/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:30:41,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:30:41,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:30:41,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:30:41,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:30:41,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:30:41,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:30:41,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:30:41,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:30:41,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:30:41,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:30:41,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:30:41,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:30:41,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:30:41,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:30:41,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:30:41,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:30:41,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:30:41,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:30:41,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:30:41,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:30:41,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:30:41,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:30:41,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:30:41,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:30:41,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:30:41,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:30:41,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:30:41,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:30:41,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:30:41,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:30:41,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:30:41,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:30:41,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:30:41,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:30:41,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:30:41,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:30:41,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:30:41,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:30:41,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:30:41,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:30:41,414 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 [2020-10-28 14:30:41,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:30:41,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:30:41,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:30:41,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:30:41,476 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:30:41,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:30:41,476 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:30:41,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:30:41,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:30:41,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:30:41,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:30:41,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:30:41,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:30:41,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:30:41,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:30:41,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:30:41,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:30:41,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:30:41,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:30:41,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:30:41,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:30:41,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:30:41,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:30:41,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:30:41,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:30:41,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:30:41,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:30:41,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:30:41,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:30:41,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:30:41,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:30:42,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:30:42,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:30:42,021 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:30:42,022 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:30:42,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional-1.i [2020-10-28 14:30:42,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cdcac20e/ae6b031a40a141d1bf49a0e4801a660a/FLAG44d8b98ea [2020-10-28 14:30:42,947 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:30:42,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-optional-1.i [2020-10-28 14:30:42,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cdcac20e/ae6b031a40a141d1bf49a0e4801a660a/FLAG44d8b98ea [2020-10-28 14:30:43,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cdcac20e/ae6b031a40a141d1bf49a0e4801a660a [2020-10-28 14:30:43,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:30:43,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:30:43,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:30:43,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:30:43,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:30:43,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:30:43" (1/1) ... [2020-10-28 14:30:43,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53dc17a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43, skipping insertion in model container [2020-10-28 14:30:43,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:30:43" (1/1) ... [2020-10-28 14:30:43,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:30:43,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:30:43,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:30:43,608 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:30:43,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:30:43,731 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:30:43,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43 WrapperNode [2020-10-28 14:30:43,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:30:43,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:30:43,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:30:43,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:30:43,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43" (1/1) ... [2020-10-28 14:30:43,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43" (1/1) ... [2020-10-28 14:30:43,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43" (1/1) ... [2020-10-28 14:30:43,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43" (1/1) ... [2020-10-28 14:30:43,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43" (1/1) ... [2020-10-28 14:30:43,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43" (1/1) ... [2020-10-28 14:30:43,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43" (1/1) ... [2020-10-28 14:30:43,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:30:43,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:30:43,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:30:43,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:30:43,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43" (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 [2020-10-28 14:30:43,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:30:43,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:30:43,979 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:30:43,980 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:30:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:30:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:30:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:30:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:30:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:30:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:30:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:30:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:30:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:30:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:30:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:30:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:30:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:30:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:30:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:30:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:30:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:30:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:30:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:30:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:30:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:30:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:30:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:30:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:30:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:30:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:30:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:30:43,989 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:30:43,989 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:30:43,989 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:30:43,989 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:30:43,989 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:30:43,989 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:30:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:30:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:30:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:30:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:30:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:30:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:30:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:30:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:30:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:30:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:30:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:30:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:30:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:30:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:30:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:30:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:30:43,994 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:30:43,994 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:30:43,995 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:30:43,995 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:30:43,995 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:30:43,995 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:30:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:30:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:30:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:30:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:30:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:30:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:30:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:30:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:30:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:30:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:30:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:30:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:30:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:30:44,000 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:30:44,000 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:30:44,001 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:30:44,001 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:30:44,001 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:30:44,001 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:30:44,001 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:30:44,002 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:30:44,002 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:30:44,002 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:30:44,003 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:30:44,003 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:30:44,003 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:30:44,003 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:30:44,004 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:30:44,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:30:44,004 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:30:44,004 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:30:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:30:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:30:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:30:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:30:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:30:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:30:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:30:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:30:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:30:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:30:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:30:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:30:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:30:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:30:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:30:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:30:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:30:44,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:30:44,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:30:44,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:30:44,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:30:44,008 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:30:44,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:30:44,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:30:44,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:30:44,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:30:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:30:44,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:30:44,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:30:44,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:30:44,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:30:44,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:30:44,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:30:44,914 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:30:44,915 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 14:30:44,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:30:44 BoogieIcfgContainer [2020-10-28 14:30:44,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:30:44,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:30:44,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:30:44,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:30:44,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:30:43" (1/3) ... [2020-10-28 14:30:44,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea41b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:30:44, skipping insertion in model container [2020-10-28 14:30:44,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:43" (2/3) ... [2020-10-28 14:30:44,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea41b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:30:44, skipping insertion in model container [2020-10-28 14:30:44,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:30:44" (3/3) ... [2020-10-28 14:30:44,926 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-optional-1.i [2020-10-28 14:30:44,939 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:30:44,945 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:30:44,960 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:30:44,992 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:30:44,993 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:30:44,993 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:30:44,995 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:30:44,995 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:30:44,995 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:30:44,995 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:30:44,996 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:30:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-28 14:30:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:30:45,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:45,020 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] [2020-10-28 14:30:45,021 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:45,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1827068410, now seen corresponding path program 1 times [2020-10-28 14:30:45,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:45,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151609609] [2020-10-28 14:30:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:45,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:45,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:30:45,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:45,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-28 14:30:45,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:45,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:30:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:45,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 14:30:46,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:46,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:46,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:46,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:46,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:46,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:46,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:46,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:46,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:46,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:46,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151609609] [2020-10-28 14:30:46,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:46,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:30:46,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880863316] [2020-10-28 14:30:46,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:30:46,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:46,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:30:46,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:30:46,111 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-28 14:30:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:46,259 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-10-28 14:30:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:30:46,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 14:30:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:46,272 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:30:46,272 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:30:46,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:30:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:30:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 14:30:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:30:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-28 14:30:46,326 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 21 [2020-10-28 14:30:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:46,326 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-28 14:30:46,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:30:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-28 14:30:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:30:46,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:46,328 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] [2020-10-28 14:30:46,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:30:46,328 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1663384491, now seen corresponding path program 1 times [2020-10-28 14:30:46,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:46,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049911635] [2020-10-28 14:30:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:46,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:46,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:46,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:30:46,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:46,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-28 14:30:46,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:46,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:30:46,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:46,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:46,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:46,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:46,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:46,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:46,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:46,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:46,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:46,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:46,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:46,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:46,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:46,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049911635] [2020-10-28 14:30:46,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:46,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:30:46,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127752660] [2020-10-28 14:30:46,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:46,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:46,854 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-10-28 14:30:47,316 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-28 14:30:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:47,478 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2020-10-28 14:30:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:47,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-28 14:30:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:47,481 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:30:47,482 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:30:47,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:30:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:30:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-28 14:30:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:30:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-28 14:30:47,496 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 22 [2020-10-28 14:30:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:47,496 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-28 14:30:47,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-28 14:30:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:30:47,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:47,498 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] [2020-10-28 14:30:47,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:30:47,498 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:47,499 INFO L82 PathProgramCache]: Analyzing trace with hash 111622871, now seen corresponding path program 1 times [2020-10-28 14:30:47,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:47,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453965542] [2020-10-28 14:30:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:47,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:47,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:47,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:48,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:48,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:30:48,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:30:48,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-28 14:30:48,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:48,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:30:48,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:48,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:48,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:48,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:48,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:48,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:48,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:48,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:48,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:48,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:48,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:48,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453965542] [2020-10-28 14:30:48,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:48,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:30:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950575746] [2020-10-28 14:30:48,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:48,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:48,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:48,393 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 9 states. [2020-10-28 14:30:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:48,834 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2020-10-28 14:30:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:30:48,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:30:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:48,836 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:30:48,836 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 14:30:48,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:30:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 14:30:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2020-10-28 14:30:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:30:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-28 14:30:48,848 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2020-10-28 14:30:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:48,848 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-28 14:30:48,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-28 14:30:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:30:48,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:48,850 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] [2020-10-28 14:30:48,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:30:48,850 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:48,851 INFO L82 PathProgramCache]: Analyzing trace with hash 791681241, now seen corresponding path program 1 times [2020-10-28 14:30:48,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:48,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229128000] [2020-10-28 14:30:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:48,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:48,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:49,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:49,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:30:49,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:49,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-28 14:30:49,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:49,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:49,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:49,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:30:49,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:49,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:49,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:49,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:49,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:49,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:49,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:30:49,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:49,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:49,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:49,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:49,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:49,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:49,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229128000] [2020-10-28 14:30:49,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:49,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:30:49,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126477394] [2020-10-28 14:30:49,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:49,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:49,418 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 9 states. [2020-10-28 14:30:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:49,835 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-10-28 14:30:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:49,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:30:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:49,837 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:30:49,838 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:30:49,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:30:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:30:49,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-28 14:30:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:30:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-28 14:30:49,847 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 22 [2020-10-28 14:30:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:49,847 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-28 14:30:49,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-28 14:30:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:30:49,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:49,849 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] [2020-10-28 14:30:49,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:30:49,849 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:49,850 INFO L82 PathProgramCache]: Analyzing trace with hash 19277548, now seen corresponding path program 1 times [2020-10-28 14:30:49,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:49,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622697737] [2020-10-28 14:30:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:49,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:49,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:50,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:50,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:50,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:30:50,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:30:50,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-28 14:30:50,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:50,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:30:50,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:50,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:50,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:50,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:50,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:50,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:50,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:50,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:50,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:50,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:50,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622697737] [2020-10-28 14:30:50,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:50,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:30:50,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48402856] [2020-10-28 14:30:50,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:50,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:50,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:50,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:50,869 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states. [2020-10-28 14:30:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:51,355 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2020-10-28 14:30:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:30:51,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 14:30:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:51,357 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:30:51,357 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:30:51,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:30:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 48. [2020-10-28 14:30:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:30:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-10-28 14:30:51,367 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 23 [2020-10-28 14:30:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:51,367 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-10-28 14:30:51,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-10-28 14:30:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:30:51,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:51,369 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] [2020-10-28 14:30:51,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:30:51,369 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:51,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1794284910, now seen corresponding path program 1 times [2020-10-28 14:30:51,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:51,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697834486] [2020-10-28 14:30:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:51,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:51,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:51,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:51,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:51,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:51,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:30:51,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:30:51,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-28 14:30:51,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:51,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:51,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:30:51,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:30:51,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:30:51,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:51,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:51,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:51,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:51,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:51,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:51,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:51,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:51,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:51,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:51,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:51,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:51,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:51,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697834486] [2020-10-28 14:30:51,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:51,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:30:51,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079697816] [2020-10-28 14:30:51,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:30:51,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:51,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:30:51,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:30:51,897 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 6 states. [2020-10-28 14:30:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:52,148 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-10-28 14:30:52,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:52,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 14:30:52,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:52,151 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:30:52,151 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:30:52,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:30:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2020-10-28 14:30:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:30:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2020-10-28 14:30:52,167 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 23 [2020-10-28 14:30:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:52,173 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2020-10-28 14:30:52,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:30:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2020-10-28 14:30:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:30:52,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:52,175 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:52,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:30:52,175 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:52,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1378432434, now seen corresponding path program 1 times [2020-10-28 14:30:52,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:52,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880312819] [2020-10-28 14:30:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:52,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:52,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:52,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:30:52,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:52,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-28 14:30:52,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:52,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:52,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:30:52,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:53,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:53,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:53,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:53,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:53,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:53,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:53,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:53,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:53,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:53,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880312819] [2020-10-28 14:30:53,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:53,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:53,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043520649] [2020-10-28 14:30:53,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:53,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:53,202 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 11 states. [2020-10-28 14:30:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:54,034 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2020-10-28 14:30:54,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:30:54,035 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-28 14:30:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:54,036 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:30:54,036 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 14:30:54,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:30:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 14:30:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2020-10-28 14:30:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:30:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2020-10-28 14:30:54,059 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 25 [2020-10-28 14:30:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:54,059 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2020-10-28 14:30:54,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2020-10-28 14:30:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:30:54,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:54,064 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:54,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:30:54,065 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 396574928, now seen corresponding path program 1 times [2020-10-28 14:30:54,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:54,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117000471] [2020-10-28 14:30:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:54,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:54,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:54,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:55,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:55,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:30:55,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:30:55,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1408 [2020-10-28 14:30:55,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:55,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:30:55,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:55,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:55,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:55,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:55,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:55,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:55,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:30:55,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:55,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:55,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:55,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:55,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:55,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:55,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117000471] [2020-10-28 14:30:55,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:55,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:55,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182073428] [2020-10-28 14:30:55,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:55,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:55,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:55,660 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand 10 states. [2020-10-28 14:30:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:56,053 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2020-10-28 14:30:56,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:56,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-28 14:30:56,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:56,056 INFO L225 Difference]: With dead ends: 101 [2020-10-28 14:30:56,056 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 14:30:56,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 14:30:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2020-10-28 14:30:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:30:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2020-10-28 14:30:56,076 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 25 [2020-10-28 14:30:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:56,077 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2020-10-28 14:30:56,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2020-10-28 14:30:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:30:56,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:56,082 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:56,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:30:56,082 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1076633298, now seen corresponding path program 1 times [2020-10-28 14:30:56,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:56,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179754898] [2020-10-28 14:30:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:56,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:57,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:30:57,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:57,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-28 14:30:57,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:57,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:30:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:57,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:57,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:57,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:57,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:57,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:57,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:57,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:57,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:57,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179754898] [2020-10-28 14:30:57,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:57,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:57,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287403648] [2020-10-28 14:30:57,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:57,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:57,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:57,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:57,539 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand 12 states. [2020-10-28 14:30:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:58,139 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-28 14:30:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:58,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-28 14:30:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:58,141 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:30:58,141 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 14:30:58,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:30:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 14:30:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-28 14:30:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:30:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-10-28 14:30:58,156 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 25 [2020-10-28 14:30:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:58,156 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-10-28 14:30:58,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-10-28 14:30:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:30:58,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:58,160 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:58,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:30:58,160 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:58,161 INFO L82 PathProgramCache]: Analyzing trace with hash 243059799, now seen corresponding path program 1 times [2020-10-28 14:30:58,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:58,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151537736] [2020-10-28 14:30:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:58,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:58,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:58,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:58,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:58,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:00,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:01,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:01,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:31:01,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:31:01,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3803 [2020-10-28 14:31:01,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:01,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:31:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:31:01,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:02,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:02,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:02,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:02,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:02,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:02,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:02,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:02,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:02,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:02,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:02,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:02,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151537736] [2020-10-28 14:31:02,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:02,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:02,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664598414] [2020-10-28 14:31:02,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:02,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:02,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:02,302 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 10 states. [2020-10-28 14:31:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:02,991 INFO L93 Difference]: Finished difference Result 108 states and 138 transitions. [2020-10-28 14:31:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:31:02,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 14:31:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:02,993 INFO L225 Difference]: With dead ends: 108 [2020-10-28 14:31:02,993 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 14:31:02,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:02,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 14:31:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 57. [2020-10-28 14:31:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:31:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-10-28 14:31:03,013 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 26 [2020-10-28 14:31:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:03,015 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-10-28 14:31:03,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2020-10-28 14:31:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:03,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:03,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:03,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:31:03,016 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1672684518, now seen corresponding path program 1 times [2020-10-28 14:31:03,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:03,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969539523] [2020-10-28 14:31:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:03,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:03,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:03,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:03,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 14:31:03,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:03,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:31:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:31:03,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:03,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:03,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:03,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:03,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:03,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:03,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:03,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:03,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969539523] [2020-10-28 14:31:03,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:03,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:31:03,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273893704] [2020-10-28 14:31:03,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:31:03,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:03,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:31:03,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:31:03,264 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand 7 states. [2020-10-28 14:31:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:03,535 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-10-28 14:31:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:31:03,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-28 14:31:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:03,536 INFO L225 Difference]: With dead ends: 88 [2020-10-28 14:31:03,536 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:31:03,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:31:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 14:31:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:31:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-28 14:31:03,545 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 32 [2020-10-28 14:31:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:03,545 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-28 14:31:03,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:31:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-28 14:31:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:03,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:03,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:03,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:31:03,546 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:03,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:03,547 INFO L82 PathProgramCache]: Analyzing trace with hash -331841837, now seen corresponding path program 1 times [2020-10-28 14:31:03,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:03,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515706912] [2020-10-28 14:31:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:03,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:04,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:04,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:04,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-28 14:31:04,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:04,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:04,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:04,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:04,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:31:04,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:05,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:05,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:05,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:05,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:05,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:31:05,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:05,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:05,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:05,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:05,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:05,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:31:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:05,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515706912] [2020-10-28 14:31:05,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:05,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:05,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549674715] [2020-10-28 14:31:05,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:05,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:05,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:05,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:05,158 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 11 states. [2020-10-28 14:31:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:06,412 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2020-10-28 14:31:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:31:06,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-28 14:31:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:06,415 INFO L225 Difference]: With dead ends: 130 [2020-10-28 14:31:06,415 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:31:06,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:31:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:31:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2020-10-28 14:31:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 14:31:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2020-10-28 14:31:06,439 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 35 [2020-10-28 14:31:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:06,439 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2020-10-28 14:31:06,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2020-10-28 14:31:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:06,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:06,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:06,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:31:06,440 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1443165525, now seen corresponding path program 1 times [2020-10-28 14:31:06,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:06,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582346496] [2020-10-28 14:31:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:06,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:06,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:06,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:07,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:07,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:07,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:07,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:08,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:09,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:09,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:09,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:31:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3424 [2020-10-28 14:31:09,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:09,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:31:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 14:31:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:31:09,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:09,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:09,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:10,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:10,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:10,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:10,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:10,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:10,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:10,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:10,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:10,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:31:10,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582346496] [2020-10-28 14:31:10,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:10,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:31:10,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91222040] [2020-10-28 14:31:10,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:31:10,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:31:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:31:10,011 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 7 states. [2020-10-28 14:31:10,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:10,289 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2020-10-28 14:31:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:31:10,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-28 14:31:10,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:10,290 INFO L225 Difference]: With dead ends: 129 [2020-10-28 14:31:10,290 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:31:10,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:31:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 87. [2020-10-28 14:31:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:31:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2020-10-28 14:31:10,304 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 35 [2020-10-28 14:31:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:10,305 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2020-10-28 14:31:10,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:31:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2020-10-28 14:31:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:10,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:10,306 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] [2020-10-28 14:31:10,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:31:10,306 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:10,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2123223895, now seen corresponding path program 1 times [2020-10-28 14:31:10,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:10,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712350164] [2020-10-28 14:31:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:10,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:11,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:11,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:11,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:11,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:12,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:12,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:13,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:13,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:13,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:31:13,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2965 [2020-10-28 14:31:13,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:13,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:31:13,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:13,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:13,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:13,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:13,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:13,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:13,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:13,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:13,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:13,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:13,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:13,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:13,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712350164] [2020-10-28 14:31:13,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:13,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:13,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775832340] [2020-10-28 14:31:13,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:13,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:13,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:13,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:13,532 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 12 states. [2020-10-28 14:31:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:14,421 INFO L93 Difference]: Finished difference Result 153 states and 199 transitions. [2020-10-28 14:31:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:31:14,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:31:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:14,423 INFO L225 Difference]: With dead ends: 153 [2020-10-28 14:31:14,423 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 14:31:14,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:31:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 14:31:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2020-10-28 14:31:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:31:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2020-10-28 14:31:14,439 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 35 [2020-10-28 14:31:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:14,439 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2020-10-28 14:31:14,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2020-10-28 14:31:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:31:14,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:14,442 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:14,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:31:14,442 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:14,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1334779298, now seen corresponding path program 1 times [2020-10-28 14:31:14,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:14,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733773968] [2020-10-28 14:31:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:14,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:14,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:14,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:14,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:14,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:15,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:17,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:17,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:17,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:18,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:19,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:19,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:31:19,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 14:31:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 14:31:19,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:19,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:31:19,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:19,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:19,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:19,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:19,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:19,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:19,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:19,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:19,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:19,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:19,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:19,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:19,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:19,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733773968] [2020-10-28 14:31:19,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:19,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:19,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868657388] [2020-10-28 14:31:19,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:19,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:19,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:19,719 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand 12 states. [2020-10-28 14:31:21,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:21,357 INFO L93 Difference]: Finished difference Result 206 states and 264 transitions. [2020-10-28 14:31:21,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:31:21,358 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-28 14:31:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:21,360 INFO L225 Difference]: With dead ends: 206 [2020-10-28 14:31:21,360 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 14:31:21,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:31:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 14:31:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 110. [2020-10-28 14:31:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:31:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2020-10-28 14:31:21,383 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 36 [2020-10-28 14:31:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:21,384 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2020-10-28 14:31:21,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2020-10-28 14:31:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:31:21,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:21,387 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:21,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:31:21,388 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:21,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1475327908, now seen corresponding path program 1 times [2020-10-28 14:31:21,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:21,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924542829] [2020-10-28 14:31:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:21,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:26,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:26,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:31:26,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 14:31:26,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:31:26,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:26,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:31:26,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:26,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:31:26,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:26,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:26,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:26,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:26,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:26,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:26,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:26,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:26,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:26,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:26,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:26,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:26,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:26,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924542829] [2020-10-28 14:31:26,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:26,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:26,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144380571] [2020-10-28 14:31:26,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:26,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:26,720 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand 11 states. [2020-10-28 14:31:27,230 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-28 14:31:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:27,870 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2020-10-28 14:31:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:31:27,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-28 14:31:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:27,872 INFO L225 Difference]: With dead ends: 186 [2020-10-28 14:31:27,873 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 14:31:27,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:31:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 14:31:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 110. [2020-10-28 14:31:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:31:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2020-10-28 14:31:27,892 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 36 [2020-10-28 14:31:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:27,892 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2020-10-28 14:31:27,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2020-10-28 14:31:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:31:27,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:27,893 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:27,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:31:27,894 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:27,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1516615034, now seen corresponding path program 2 times [2020-10-28 14:31:27,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:27,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373754427] [2020-10-28 14:31:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:28,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:28,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:29,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:29,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:31:29,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:29,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1529 [2020-10-28 14:31:29,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:29,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:29,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:31:29,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:29,763 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-28 14:31:29,883 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-28 14:31:30,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:30,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:30,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:30,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:30,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:30,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:30,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:30,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:30,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:30,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:30,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:30,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:30,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373754427] [2020-10-28 14:31:30,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:30,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:30,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074261373] [2020-10-28 14:31:30,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:30,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:30,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:30,135 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand 13 states. [2020-10-28 14:31:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:31,394 INFO L93 Difference]: Finished difference Result 203 states and 264 transitions. [2020-10-28 14:31:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:31:31,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 14:31:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:31,396 INFO L225 Difference]: With dead ends: 203 [2020-10-28 14:31:31,396 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 14:31:31,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:31:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 14:31:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2020-10-28 14:31:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:31:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 183 transitions. [2020-10-28 14:31:31,427 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 183 transitions. Word has length 38 [2020-10-28 14:31:31,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:31,427 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 183 transitions. [2020-10-28 14:31:31,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 183 transitions. [2020-10-28 14:31:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:31:31,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:31,428 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:31,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:31:31,428 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash -323286530, now seen corresponding path program 2 times [2020-10-28 14:31:31,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:31,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646045030] [2020-10-28 14:31:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:31,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:31,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:31,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:32,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:32,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:32,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:32,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:33,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:33,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:35,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:35,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:31:35,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:31:35,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3907 [2020-10-28 14:31:35,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:35,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:35,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:35,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:35,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:31:35,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:35,835 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-28 14:31:36,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:36,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:36,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:36,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:36,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:36,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:36,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:36,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:36,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:36,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:36,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:36,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:36,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646045030] [2020-10-28 14:31:36,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:36,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:31:36,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742270616] [2020-10-28 14:31:36,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:31:36,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:36,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:31:36,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:36,101 INFO L87 Difference]: Start difference. First operand 142 states and 183 transitions. Second operand 15 states. [2020-10-28 14:31:36,574 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-28 14:31:36,811 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 14:31:37,025 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-28 14:31:37,295 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-28 14:31:37,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:37,954 INFO L93 Difference]: Finished difference Result 279 states and 358 transitions. [2020-10-28 14:31:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:31:37,954 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-28 14:31:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:37,956 INFO L225 Difference]: With dead ends: 279 [2020-10-28 14:31:37,956 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 14:31:37,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:31:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 14:31:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 174. [2020-10-28 14:31:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 14:31:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 224 transitions. [2020-10-28 14:31:37,984 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 224 transitions. Word has length 38 [2020-10-28 14:31:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:37,984 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 224 transitions. [2020-10-28 14:31:37,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:31:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 224 transitions. [2020-10-28 14:31:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:31:37,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:37,985 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] [2020-10-28 14:31:37,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:31:37,985 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:37,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:37,986 INFO L82 PathProgramCache]: Analyzing trace with hash 962465887, now seen corresponding path program 1 times [2020-10-28 14:31:37,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:37,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430259420] [2020-10-28 14:31:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:41,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:41,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:31:41,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:31:41,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3763 [2020-10-28 14:31:41,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:41,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:41,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:41,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:41,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:31:41,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:42,178 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2020-10-28 14:31:42,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:42,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:42,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:42,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:42,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:42,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:42,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:42,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:42,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430259420] [2020-10-28 14:31:42,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:42,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:31:42,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515468055] [2020-10-28 14:31:42,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:31:42,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:42,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:31:42,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:42,473 INFO L87 Difference]: Start difference. First operand 174 states and 224 transitions. Second operand 15 states. [2020-10-28 14:31:42,853 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-28 14:31:43,210 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-28 14:31:43,395 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-28 14:31:43,609 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-28 14:31:43,839 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-28 14:31:44,131 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-28 14:31:45,380 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-28 14:31:45,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:45,618 INFO L93 Difference]: Finished difference Result 263 states and 336 transitions. [2020-10-28 14:31:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:31:45,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-28 14:31:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:45,621 INFO L225 Difference]: With dead ends: 263 [2020-10-28 14:31:45,621 INFO L226 Difference]: Without dead ends: 259 [2020-10-28 14:31:45,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=274, Invalid=1132, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:31:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-28 14:31:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 172. [2020-10-28 14:31:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 14:31:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 221 transitions. [2020-10-28 14:31:45,650 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 221 transitions. Word has length 39 [2020-10-28 14:31:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:45,651 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 221 transitions. [2020-10-28 14:31:45,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:31:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 221 transitions. [2020-10-28 14:31:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:31:45,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:45,651 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:45,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:31:45,652 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:45,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2004906059, now seen corresponding path program 1 times [2020-10-28 14:31:45,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:45,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388218964] [2020-10-28 14:31:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:45,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:47,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:47,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:48,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:48,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:48,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:48,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:48,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:49,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:49,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:49,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:49,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:50,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:50,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:31:50,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 14:31:50,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 14:31:50,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:50,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:50,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:50,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:50,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:31:50,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:51,100 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-28 14:31:51,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:51,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:51,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:51,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:51,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:51,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:31:51,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:51,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:51,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:51,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:51,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388218964] [2020-10-28 14:31:51,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:51,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:31:51,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739630609] [2020-10-28 14:31:51,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:31:51,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:31:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:51,493 INFO L87 Difference]: Start difference. First operand 172 states and 221 transitions. Second operand 15 states. [2020-10-28 14:31:52,216 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 14:31:52,581 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-28 14:31:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:53,656 INFO L93 Difference]: Finished difference Result 307 states and 395 transitions. [2020-10-28 14:31:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:31:53,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-28 14:31:53,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:53,659 INFO L225 Difference]: With dead ends: 307 [2020-10-28 14:31:53,659 INFO L226 Difference]: Without dead ends: 303 [2020-10-28 14:31:53,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:31:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-28 14:31:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 186. [2020-10-28 14:31:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 14:31:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 243 transitions. [2020-10-28 14:31:53,693 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 243 transitions. Word has length 39 [2020-10-28 14:31:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:53,694 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 243 transitions. [2020-10-28 14:31:53,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:31:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 243 transitions. [2020-10-28 14:31:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:31:53,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:53,695 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:53,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:31:53,695 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1495432969, now seen corresponding path program 1 times [2020-10-28 14:31:53,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:53,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680340432] [2020-10-28 14:31:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:53,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:53,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:55,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:55,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:55,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:56,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:56,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:56,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:56,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:56,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:57,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:57,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:57,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:57,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:57,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:58,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:58,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:58,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:31:58,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 14:31:58,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-28 14:31:58,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:58,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:58,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:31:58,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:58,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:31:58,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:59,225 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-28 14:31:59,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:59,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:59,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:59,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:59,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:59,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:59,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:59,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:59,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:59,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680340432] [2020-10-28 14:31:59,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:59,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:31:59,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275598486] [2020-10-28 14:31:59,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:31:59,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:59,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:31:59,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:59,732 INFO L87 Difference]: Start difference. First operand 186 states and 243 transitions. Second operand 16 states. [2020-10-28 14:32:00,290 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-28 14:32:00,555 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:32:00,956 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:32:01,607 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-28 14:32:01,794 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-28 14:32:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:02,665 INFO L93 Difference]: Finished difference Result 347 states and 444 transitions. [2020-10-28 14:32:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:32:02,665 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-28 14:32:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:02,668 INFO L225 Difference]: With dead ends: 347 [2020-10-28 14:32:02,669 INFO L226 Difference]: Without dead ends: 343 [2020-10-28 14:32:02,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:32:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-28 14:32:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 239. [2020-10-28 14:32:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-28 14:32:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 312 transitions. [2020-10-28 14:32:02,701 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 312 transitions. Word has length 39 [2020-10-28 14:32:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:02,701 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 312 transitions. [2020-10-28 14:32:02,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:32:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 312 transitions. [2020-10-28 14:32:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:32:02,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:02,703 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:02,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:32:02,703 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:02,703 INFO L82 PathProgramCache]: Analyzing trace with hash -331528552, now seen corresponding path program 1 times [2020-10-28 14:32:02,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:02,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983011186] [2020-10-28 14:32:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:02,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:02,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:02,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:03,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:03,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:03,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:03,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:04,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:04,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:04,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:04,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:07,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:07,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:32:07,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 14:32:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:32:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:07,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:32:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:32:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:32:07,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:07,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:07,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:07,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:07,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:07,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:07,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:07,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:07,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:07,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:07,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:07,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:07,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 14:32:07,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983011186] [2020-10-28 14:32:07,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:32:07,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:32:07,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189366682] [2020-10-28 14:32:07,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:32:07,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:32:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:32:07,767 INFO L87 Difference]: Start difference. First operand 239 states and 312 transitions. Second operand 5 states. [2020-10-28 14:32:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:07,925 INFO L93 Difference]: Finished difference Result 355 states and 463 transitions. [2020-10-28 14:32:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:32:07,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-10-28 14:32:07,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:07,929 INFO L225 Difference]: With dead ends: 355 [2020-10-28 14:32:07,930 INFO L226 Difference]: Without dead ends: 294 [2020-10-28 14:32:07,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:32:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-28 14:32:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 251. [2020-10-28 14:32:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-28 14:32:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 323 transitions. [2020-10-28 14:32:07,993 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 323 transitions. Word has length 40 [2020-10-28 14:32:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:07,994 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 323 transitions. [2020-10-28 14:32:07,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:32:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 323 transitions. [2020-10-28 14:32:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:32:07,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:07,996 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:07,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:32:07,996 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1919876454, now seen corresponding path program 1 times [2020-10-28 14:32:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:07,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548235048] [2020-10-28 14:32:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:08,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:08,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:08,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:09,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:09,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:11,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:11,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:32:11,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:32:11,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3503 [2020-10-28 14:32:11,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:11,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:32:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:32:11,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:11,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:11,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:11,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:11,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:11,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:11,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:11,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:11,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:11,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:11,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:11,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:11,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:11,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548235048] [2020-10-28 14:32:11,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:11,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:11,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383553776] [2020-10-28 14:32:11,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:11,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:11,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:11,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:11,842 INFO L87 Difference]: Start difference. First operand 251 states and 323 transitions. Second operand 12 states. [2020-10-28 14:32:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:12,685 INFO L93 Difference]: Finished difference Result 381 states and 484 transitions. [2020-10-28 14:32:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:12,686 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-28 14:32:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:12,688 INFO L225 Difference]: With dead ends: 381 [2020-10-28 14:32:12,688 INFO L226 Difference]: Without dead ends: 377 [2020-10-28 14:32:12,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-28 14:32:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 268. [2020-10-28 14:32:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-28 14:32:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 344 transitions. [2020-10-28 14:32:12,728 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 344 transitions. Word has length 40 [2020-10-28 14:32:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:12,728 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 344 transitions. [2020-10-28 14:32:12,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:12,729 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 344 transitions. [2020-10-28 14:32:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:12,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:12,730 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:12,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:32:12,730 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:12,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1175410317, now seen corresponding path program 3 times [2020-10-28 14:32:12,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:12,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55375058] [2020-10-28 14:32:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:12,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:13,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:14,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:14,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:14,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:14,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1809 [2020-10-28 14:32:14,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:14,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:32:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:15,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:15,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:15,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:15,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:15,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:15,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:15,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:15,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:15,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:15,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:15,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55375058] [2020-10-28 14:32:15,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:15,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:15,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050664121] [2020-10-28 14:32:15,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:15,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:15,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:15,091 INFO L87 Difference]: Start difference. First operand 268 states and 344 transitions. Second operand 14 states. [2020-10-28 14:32:15,628 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-28 14:32:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:16,440 INFO L93 Difference]: Finished difference Result 391 states and 495 transitions. [2020-10-28 14:32:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:16,441 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 14:32:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:16,443 INFO L225 Difference]: With dead ends: 391 [2020-10-28 14:32:16,443 INFO L226 Difference]: Without dead ends: 372 [2020-10-28 14:32:16,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-28 14:32:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 246. [2020-10-28 14:32:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-28 14:32:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 319 transitions. [2020-10-28 14:32:16,486 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 319 transitions. Word has length 41 [2020-10-28 14:32:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:16,486 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 319 transitions. [2020-10-28 14:32:16,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 319 transitions. [2020-10-28 14:32:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:32:16,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:16,488 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:16,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:32:16,490 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash -885941370, now seen corresponding path program 2 times [2020-10-28 14:32:16,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:16,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386459008] [2020-10-28 14:32:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:16,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:16,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:17,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:17,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:17,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:17,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:18,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:18,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:18,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:21,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:21,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:32:21,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:32:21,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:32:21,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:21,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:32:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:32:21,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:21,954 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-28 14:32:22,286 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-28 14:32:22,690 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-28 14:32:23,002 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-28 14:32:23,148 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-10-28 14:32:23,430 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2020-10-28 14:32:23,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:23,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:23,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:23,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:23,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:23,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:23,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:23,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:23,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:23,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:23,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:23,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386459008] [2020-10-28 14:32:23,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:23,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:32:23,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102002859] [2020-10-28 14:32:23,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:32:23,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:23,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:32:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:32:23,812 INFO L87 Difference]: Start difference. First operand 246 states and 319 transitions. Second operand 18 states. [2020-10-28 14:32:24,268 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-28 14:32:24,512 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-28 14:32:24,785 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-28 14:32:25,026 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-28 14:32:25,487 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2020-10-28 14:32:25,937 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-28 14:32:26,172 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-28 14:32:26,763 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2020-10-28 14:32:27,015 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-28 14:32:27,176 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 44 [2020-10-28 14:32:27,462 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2020-10-28 14:32:27,925 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2020-10-28 14:32:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:29,290 INFO L93 Difference]: Finished difference Result 490 states and 610 transitions. [2020-10-28 14:32:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:32:29,290 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-28 14:32:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:29,293 INFO L225 Difference]: With dead ends: 490 [2020-10-28 14:32:29,293 INFO L226 Difference]: Without dead ends: 486 [2020-10-28 14:32:29,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=462, Invalid=2190, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 14:32:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-28 14:32:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 252. [2020-10-28 14:32:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-28 14:32:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 329 transitions. [2020-10-28 14:32:29,339 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 329 transitions. Word has length 42 [2020-10-28 14:32:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:29,339 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 329 transitions. [2020-10-28 14:32:29,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:32:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 329 transitions. [2020-10-28 14:32:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:32:29,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:29,340 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:29,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:32:29,340 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:29,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1683402762, now seen corresponding path program 3 times [2020-10-28 14:32:29,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:29,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534001407] [2020-10-28 14:32:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:29,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:29,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:29,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:30,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:30,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:30,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:31,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:31,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:34,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:34,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:32:34,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:32:34,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4704 [2020-10-28 14:32:34,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:34,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:32:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:32:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:34,386 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-28 14:32:34,579 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-28 14:32:34,797 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-28 14:32:35,150 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-28 14:32:35,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:35,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:35,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:35,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:35,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:35,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:35,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:35,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:35,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534001407] [2020-10-28 14:32:35,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:35,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:32:35,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20944154] [2020-10-28 14:32:35,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:32:35,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:35,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:32:35,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:32:35,559 INFO L87 Difference]: Start difference. First operand 252 states and 329 transitions. Second operand 17 states. [2020-10-28 14:32:36,169 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-28 14:32:36,561 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-28 14:32:36,861 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-28 14:32:37,166 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-28 14:32:37,640 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-28 14:32:37,978 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-28 14:32:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:39,040 INFO L93 Difference]: Finished difference Result 476 states and 603 transitions. [2020-10-28 14:32:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:32:39,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-28 14:32:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:39,045 INFO L225 Difference]: With dead ends: 476 [2020-10-28 14:32:39,045 INFO L226 Difference]: Without dead ends: 472 [2020-10-28 14:32:39,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:32:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-28 14:32:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 260. [2020-10-28 14:32:39,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-28 14:32:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 343 transitions. [2020-10-28 14:32:39,096 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 343 transitions. Word has length 42 [2020-10-28 14:32:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:39,097 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 343 transitions. [2020-10-28 14:32:39,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:32:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 343 transitions. [2020-10-28 14:32:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:32:39,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:39,098 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:39,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:32:39,099 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:39,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1010832641, now seen corresponding path program 4 times [2020-10-28 14:32:39,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:39,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445646745] [2020-10-28 14:32:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:39,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:39,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:40,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:40,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:42,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:42,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:44,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:44,758 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-28 14:32:44,993 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-28 14:32:45,154 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-28 14:32:45,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:45,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:45,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:45,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:45,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:45,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:45,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:45,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445646745] [2020-10-28 14:32:45,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:45,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:32:45,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542612305] [2020-10-28 14:32:45,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:32:45,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:45,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:32:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:45,629 INFO L87 Difference]: Start difference. First operand 260 states and 343 transitions. Second operand 20 states. [2020-10-28 14:32:46,034 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-28 14:32:46,327 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-10-28 14:32:46,529 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-28 14:32:46,837 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-28 14:32:47,228 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2020-10-28 14:32:47,621 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-28 14:32:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:49,670 INFO L93 Difference]: Finished difference Result 493 states and 622 transitions. [2020-10-28 14:32:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:32:49,672 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-28 14:32:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:49,674 INFO L225 Difference]: With dead ends: 493 [2020-10-28 14:32:49,674 INFO L226 Difference]: Without dead ends: 489 [2020-10-28 14:32:49,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=421, Invalid=2029, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:32:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-10-28 14:32:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 254. [2020-10-28 14:32:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-28 14:32:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 333 transitions. [2020-10-28 14:32:49,720 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 333 transitions. Word has length 45 [2020-10-28 14:32:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:49,721 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 333 transitions. [2020-10-28 14:32:49,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:32:49,721 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 333 transitions. [2020-10-28 14:32:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:32:49,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:49,722 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:49,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:32:49,722 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1808294033, now seen corresponding path program 5 times [2020-10-28 14:32:49,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:49,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198404425] [2020-10-28 14:32:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:49,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:50,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:51,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:51,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:52,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:52,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:52,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:53,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:54,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:54,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:32:54,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:32:54,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:32:54,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:54,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:32:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:32:54,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:55,060 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-10-28 14:32:55,318 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-28 14:32:55,469 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-28 14:32:55,672 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-28 14:32:55,858 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-28 14:32:56,226 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2020-10-28 14:32:56,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:56,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:56,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:56,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:56,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:56,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:56,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:56,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:56,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:56,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:56,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:56,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:56,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198404425] [2020-10-28 14:32:56,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:56,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:32:56,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570639241] [2020-10-28 14:32:56,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:32:56,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:32:56,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:56,758 INFO L87 Difference]: Start difference. First operand 254 states and 333 transitions. Second operand 20 states. [2020-10-28 14:32:57,227 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-28 14:32:57,446 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2020-10-28 14:32:57,664 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-28 14:32:57,911 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-28 14:32:58,328 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-10-28 14:32:58,553 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-28 14:32:58,792 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2020-10-28 14:32:59,063 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-10-28 14:32:59,329 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-28 14:33:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:00,896 INFO L93 Difference]: Finished difference Result 377 states and 482 transitions. [2020-10-28 14:33:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:33:00,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-28 14:33:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:00,899 INFO L225 Difference]: With dead ends: 377 [2020-10-28 14:33:00,899 INFO L226 Difference]: Without dead ends: 373 [2020-10-28 14:33:00,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=374, Invalid=1606, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:33:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-28 14:33:00,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 208. [2020-10-28 14:33:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 14:33:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 268 transitions. [2020-10-28 14:33:00,940 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 268 transitions. Word has length 45 [2020-10-28 14:33:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:00,940 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 268 transitions. [2020-10-28 14:33:00,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:33:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 268 transitions. [2020-10-28 14:33:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:33:00,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:00,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:00,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:33:00,948 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:00,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1915088616, now seen corresponding path program 4 times [2020-10-28 14:33:00,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:00,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857516810] [2020-10-28 14:33:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:00,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:01,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:01,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:01,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:01,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:33:01,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-28 14:33:01,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:01,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:01,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:01,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:01,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:01,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:01,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:01,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:01,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:33:01,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:01,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:01,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:01,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857516810] [2020-10-28 14:33:01,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:01,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:01,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546013988] [2020-10-28 14:33:01,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:01,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:01,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:01,892 INFO L87 Difference]: Start difference. First operand 208 states and 268 transitions. Second operand 10 states. [2020-10-28 14:33:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:02,599 INFO L93 Difference]: Finished difference Result 316 states and 397 transitions. [2020-10-28 14:33:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:02,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 14:33:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:02,601 INFO L225 Difference]: With dead ends: 316 [2020-10-28 14:33:02,601 INFO L226 Difference]: Without dead ends: 205 [2020-10-28 14:33:02,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:02,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-28 14:33:02,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-10-28 14:33:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-28 14:33:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 262 transitions. [2020-10-28 14:33:02,633 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 262 transitions. Word has length 45 [2020-10-28 14:33:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:02,634 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 262 transitions. [2020-10-28 14:33:02,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 262 transitions. [2020-10-28 14:33:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:33:02,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:02,635 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:02,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:33:02,635 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1185702655, now seen corresponding path program 5 times [2020-10-28 14:33:02,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:02,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193616718] [2020-10-28 14:33:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:02,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:03,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:04,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:04,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:33:04,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:04,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1806 [2020-10-28 14:33:04,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:04,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:04,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:33:04,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:04,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:33:04,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:04,928 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-28 14:33:05,229 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-10-28 14:33:05,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:05,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:05,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:05,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:05,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:05,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:05,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:05,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:05,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:05,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:05,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:05,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:05,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193616718] [2020-10-28 14:33:05,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:05,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:05,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869316091] [2020-10-28 14:33:05,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:05,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:05,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:05,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:05,458 INFO L87 Difference]: Start difference. First operand 205 states and 262 transitions. Second operand 16 states. [2020-10-28 14:33:05,904 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 65 [2020-10-28 14:33:06,159 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-10-28 14:33:06,360 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 47 [2020-10-28 14:33:06,639 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-28 14:33:06,947 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-28 14:33:07,699 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-28 14:33:07,916 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-28 14:33:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:08,525 INFO L93 Difference]: Finished difference Result 429 states and 543 transitions. [2020-10-28 14:33:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:33:08,526 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-28 14:33:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:08,528 INFO L225 Difference]: With dead ends: 429 [2020-10-28 14:33:08,528 INFO L226 Difference]: Without dead ends: 410 [2020-10-28 14:33:08,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:33:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-28 14:33:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 305. [2020-10-28 14:33:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-28 14:33:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 386 transitions. [2020-10-28 14:33:08,587 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 386 transitions. Word has length 48 [2020-10-28 14:33:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:08,587 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 386 transitions. [2020-10-28 14:33:08,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:08,588 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 386 transitions. [2020-10-28 14:33:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:33:08,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:08,589 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:08,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:33:08,589 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash -654198909, now seen corresponding path program 3 times [2020-10-28 14:33:08,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:08,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255070904] [2020-10-28 14:33:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:08,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:08,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:08,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:09,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:09,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:10,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:10,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:10,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:10,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:13,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:13,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:33:13,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:33:13,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:33:13,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:13,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:13,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:13,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:13,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:33:13,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:13,917 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-10-28 14:33:14,186 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-28 14:33:14,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:14,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:14,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:14,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:14,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:14,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:33:14,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:14,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:14,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:14,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:14,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:14,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255070904] [2020-10-28 14:33:14,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:14,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:33:14,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008366316] [2020-10-28 14:33:14,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:33:14,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:33:14,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:14,674 INFO L87 Difference]: Start difference. First operand 305 states and 386 transitions. Second operand 17 states. [2020-10-28 14:33:15,146 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 14:33:15,355 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-28 14:33:15,735 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-28 14:33:15,989 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-28 14:33:16,198 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-28 14:33:16,418 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-28 14:33:17,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:17,995 INFO L93 Difference]: Finished difference Result 431 states and 544 transitions. [2020-10-28 14:33:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:33:17,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-28 14:33:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:17,999 INFO L225 Difference]: With dead ends: 431 [2020-10-28 14:33:17,999 INFO L226 Difference]: Without dead ends: 400 [2020-10-28 14:33:18,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:33:18,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-28 14:33:18,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 291. [2020-10-28 14:33:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-28 14:33:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 369 transitions. [2020-10-28 14:33:18,062 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 369 transitions. Word has length 48 [2020-10-28 14:33:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:18,062 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 369 transitions. [2020-10-28 14:33:18,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:33:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 369 transitions. [2020-10-28 14:33:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:33:18,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:18,064 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:18,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:33:18,064 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 711435296, now seen corresponding path program 2 times [2020-10-28 14:33:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:18,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8856914] [2020-10-28 14:33:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:18,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:18,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:18,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:18,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:18,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:19,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:19,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:19,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:20,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:20,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:20,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:22,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:22,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:22,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:23,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:23,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:33:23,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 14:33:23,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:33:23,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:23,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:33:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:33:23,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:23,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:23,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:23,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:23,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:23,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:23,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:23,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:23,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:23,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:23,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:23,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:23,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:23,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8856914] [2020-10-28 14:33:23,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:23,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:23,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68483099] [2020-10-28 14:33:23,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:23,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:23,847 INFO L87 Difference]: Start difference. First operand 291 states and 369 transitions. Second operand 16 states. [2020-10-28 14:33:24,250 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-28 14:33:24,616 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-28 14:33:24,778 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-28 14:33:24,989 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-28 14:33:25,301 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-28 14:33:25,522 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-28 14:33:25,936 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-28 14:33:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:27,381 INFO L93 Difference]: Finished difference Result 533 states and 666 transitions. [2020-10-28 14:33:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:33:27,382 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-28 14:33:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:27,386 INFO L225 Difference]: With dead ends: 533 [2020-10-28 14:33:27,386 INFO L226 Difference]: Without dead ends: 529 [2020-10-28 14:33:27,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=299, Invalid=1507, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:33:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-10-28 14:33:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 371. [2020-10-28 14:33:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-28 14:33:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 471 transitions. [2020-10-28 14:33:27,466 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 471 transitions. Word has length 49 [2020-10-28 14:33:27,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:27,467 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 471 transitions. [2020-10-28 14:33:27,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 471 transitions. [2020-10-28 14:33:27,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:33:27,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:27,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:27,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:33:27,469 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 449247270, now seen corresponding path program 6 times [2020-10-28 14:33:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:27,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436994928] [2020-10-28 14:33:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:27,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:27,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:27,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:27,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:28,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:28,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:28,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:29,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:30,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:31,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:31,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:31,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:32,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:33:32,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 14:33:32,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-28 14:33:32,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:32,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:32,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:32,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:32,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:33:32,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:32,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:32,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:32,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:32,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:32,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:32,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:32,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:32,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:32,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:32,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:32,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:32,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436994928] [2020-10-28 14:33:32,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:32,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:33:32,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049822623] [2020-10-28 14:33:32,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:33:32,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:32,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:33:32,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:32,888 INFO L87 Difference]: Start difference. First operand 371 states and 471 transitions. Second operand 12 states. [2020-10-28 14:33:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:34,309 INFO L93 Difference]: Finished difference Result 588 states and 735 transitions. [2020-10-28 14:33:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:33:34,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-28 14:33:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:34,314 INFO L225 Difference]: With dead ends: 588 [2020-10-28 14:33:34,314 INFO L226 Difference]: Without dead ends: 584 [2020-10-28 14:33:34,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:33:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-10-28 14:33:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 370. [2020-10-28 14:33:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-28 14:33:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 469 transitions. [2020-10-28 14:33:34,398 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 469 transitions. Word has length 49 [2020-10-28 14:33:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:34,399 INFO L481 AbstractCegarLoop]: Abstraction has 370 states and 469 transitions. [2020-10-28 14:33:34,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:33:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 469 transitions. [2020-10-28 14:33:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:33:34,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:34,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:34,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:33:34,401 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash 701854648, now seen corresponding path program 6 times [2020-10-28 14:33:34,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:34,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904578588] [2020-10-28 14:33:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:34,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:35,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:38,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:33:38,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:38,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3994 [2020-10-28 14:33:38,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:38,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:38,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:38,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:38,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:33:38,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:38,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:38,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:38,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:38,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:38,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:38,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:38,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:38,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:38,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:38,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:38,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:38,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904578588] [2020-10-28 14:33:38,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:38,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:38,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387696309] [2020-10-28 14:33:38,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:38,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:38,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:38,984 INFO L87 Difference]: Start difference. First operand 370 states and 469 transitions. Second operand 15 states. [2020-10-28 14:33:39,825 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-28 14:33:41,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:41,027 INFO L93 Difference]: Finished difference Result 672 states and 849 transitions. [2020-10-28 14:33:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:33:41,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-28 14:33:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:41,030 INFO L225 Difference]: With dead ends: 672 [2020-10-28 14:33:41,030 INFO L226 Difference]: Without dead ends: 653 [2020-10-28 14:33:41,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:33:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2020-10-28 14:33:41,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 512. [2020-10-28 14:33:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-10-28 14:33:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 648 transitions. [2020-10-28 14:33:41,143 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 648 transitions. Word has length 51 [2020-10-28 14:33:41,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:41,143 INFO L481 AbstractCegarLoop]: Abstraction has 512 states and 648 transitions. [2020-10-28 14:33:41,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:33:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 648 transitions. [2020-10-28 14:33:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:33:41,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:41,145 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:41,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:33:41,146 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1138046916, now seen corresponding path program 4 times [2020-10-28 14:33:41,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:41,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070661197] [2020-10-28 14:33:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:41,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:41,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:33:46,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:33:46,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 14:33:46,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:33:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:33:46,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:46,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:46,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:46,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:46,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:46,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:46,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070661197] [2020-10-28 14:33:46,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:46,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:46,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566417369] [2020-10-28 14:33:46,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:46,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:46,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:46,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:46,741 INFO L87 Difference]: Start difference. First operand 512 states and 648 transitions. Second operand 16 states. [2020-10-28 14:33:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:48,155 INFO L93 Difference]: Finished difference Result 773 states and 971 transitions. [2020-10-28 14:33:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:33:48,155 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-28 14:33:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:48,158 INFO L225 Difference]: With dead ends: 773 [2020-10-28 14:33:48,158 INFO L226 Difference]: Without dead ends: 742 [2020-10-28 14:33:48,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:33:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2020-10-28 14:33:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 570. [2020-10-28 14:33:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-10-28 14:33:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 724 transitions. [2020-10-28 14:33:48,269 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 724 transitions. Word has length 51 [2020-10-28 14:33:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:48,270 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 724 transitions. [2020-10-28 14:33:48,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 724 transitions. [2020-10-28 14:33:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:33:48,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:48,272 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:48,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:33:48,272 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2049600777, now seen corresponding path program 3 times [2020-10-28 14:33:48,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:48,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850376780] [2020-10-28 14:33:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:53,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:33:53,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:33:53,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 14:33:53,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:53,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:33:53,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:53,516 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-10-28 14:33:53,665 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-28 14:33:53,822 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-28 14:33:53,972 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-28 14:33:54,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:54,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:54,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:54,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:33:54,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:54,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:54,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:54,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:54,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850376780] [2020-10-28 14:33:54,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:54,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:54,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741032254] [2020-10-28 14:33:54,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:54,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:54,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:54,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:54,368 INFO L87 Difference]: Start difference. First operand 570 states and 724 transitions. Second operand 15 states. [2020-10-28 14:33:55,321 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-28 14:33:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:57,169 INFO L93 Difference]: Finished difference Result 944 states and 1212 transitions. [2020-10-28 14:33:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:33:57,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-28 14:33:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:57,173 INFO L225 Difference]: With dead ends: 944 [2020-10-28 14:33:57,174 INFO L226 Difference]: Without dead ends: 913 [2020-10-28 14:33:57,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:33:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2020-10-28 14:33:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 703. [2020-10-28 14:33:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-10-28 14:33:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 895 transitions. [2020-10-28 14:33:57,322 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 895 transitions. Word has length 52 [2020-10-28 14:33:57,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:57,322 INFO L481 AbstractCegarLoop]: Abstraction has 703 states and 895 transitions. [2020-10-28 14:33:57,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:33:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 895 transitions. [2020-10-28 14:33:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:33:57,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:57,324 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:57,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:33:57,325 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash 405464955, now seen corresponding path program 7 times [2020-10-28 14:33:57,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:57,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264934162] [2020-10-28 14:33:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:57,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:02,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:34:02,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 14:34:02,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 14:34:02,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:02,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:02,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:34:02,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:02,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:34:02,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:02,922 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-28 14:34:03,136 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-28 14:34:03,654 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-28 14:34:03,798 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-28 14:34:03,947 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-10-28 14:34:04,080 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-10-28 14:34:04,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:04,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:04,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:04,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:04,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:04,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:04,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:04,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:04,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:04,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:04,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:04,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:04,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264934162] [2020-10-28 14:34:04,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:04,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:34:04,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905489146] [2020-10-28 14:34:04,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:34:04,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:34:04,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:34:04,673 INFO L87 Difference]: Start difference. First operand 703 states and 895 transitions. Second operand 20 states. [2020-10-28 14:34:05,217 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2020-10-28 14:34:05,494 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 46 [2020-10-28 14:34:05,729 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-28 14:34:06,146 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2020-10-28 14:34:06,399 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2020-10-28 14:34:06,696 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-28 14:34:07,249 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 78 [2020-10-28 14:34:07,547 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-10-28 14:34:08,058 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-10-28 14:34:08,472 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-28 14:34:08,838 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-28 14:34:09,139 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-28 14:34:09,523 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-28 14:34:09,689 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-28 14:34:10,586 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-28 14:34:10,936 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-28 14:34:11,653 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 14:34:11,843 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 14:34:12,255 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:34:12,896 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-28 14:34:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:13,934 INFO L93 Difference]: Finished difference Result 1093 states and 1361 transitions. [2020-10-28 14:34:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 14:34:13,935 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-28 14:34:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:13,939 INFO L225 Difference]: With dead ends: 1093 [2020-10-28 14:34:13,939 INFO L226 Difference]: Without dead ends: 1089 [2020-10-28 14:34:13,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=913, Invalid=4199, Unknown=0, NotChecked=0, Total=5112 [2020-10-28 14:34:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2020-10-28 14:34:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 699. [2020-10-28 14:34:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2020-10-28 14:34:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 894 transitions. [2020-10-28 14:34:14,103 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 894 transitions. Word has length 52 [2020-10-28 14:34:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:14,103 INFO L481 AbstractCegarLoop]: Abstraction has 699 states and 894 transitions. [2020-10-28 14:34:14,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:34:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 894 transitions. [2020-10-28 14:34:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:34:14,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:14,106 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:14,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:34:14,106 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1832220671, now seen corresponding path program 8 times [2020-10-28 14:34:14,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:14,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813870408] [2020-10-28 14:34:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:16,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:16,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:17,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:17,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:18,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:18,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:19,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:34:19,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 14:34:19,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 14:34:19,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:19,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:34:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:34:19,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:19,380 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-10-28 14:34:19,516 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-28 14:34:19,663 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-28 14:34:19,880 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-28 14:34:20,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:20,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:20,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:20,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:20,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:20,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:34:20,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:20,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:20,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:20,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:20,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:20,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:20,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813870408] [2020-10-28 14:34:20,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:20,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:34:20,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910323071] [2020-10-28 14:34:20,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:34:20,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:20,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:34:20,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:20,464 INFO L87 Difference]: Start difference. First operand 699 states and 894 transitions. Second operand 18 states. [2020-10-28 14:34:20,847 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-28 14:34:21,072 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-28 14:34:21,597 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-28 14:34:21,970 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-28 14:34:22,191 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-28 14:34:22,476 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-28 14:34:22,707 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-28 14:34:22,900 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-28 14:34:23,708 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-28 14:34:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:24,173 INFO L93 Difference]: Finished difference Result 856 states and 1081 transitions. [2020-10-28 14:34:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:34:24,174 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-28 14:34:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:24,178 INFO L225 Difference]: With dead ends: 856 [2020-10-28 14:34:24,178 INFO L226 Difference]: Without dead ends: 837 [2020-10-28 14:34:24,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:34:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-10-28 14:34:24,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 735. [2020-10-28 14:34:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2020-10-28 14:34:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 936 transitions. [2020-10-28 14:34:24,318 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 936 transitions. Word has length 52 [2020-10-28 14:34:24,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:24,318 INFO L481 AbstractCegarLoop]: Abstraction has 735 states and 936 transitions. [2020-10-28 14:34:24,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:34:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 936 transitions. [2020-10-28 14:34:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:34:24,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:24,320 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:24,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:34:24,321 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1211869136, now seen corresponding path program 9 times [2020-10-28 14:34:24,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:24,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506094696] [2020-10-28 14:34:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:24,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:25,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:25,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:26,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:27,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:27,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking...