/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/dll-queue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:29:43,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:29:43,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:29:43,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:29:43,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:29:43,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:29:43,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:29:43,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:29:43,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:29:43,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:29:43,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:29:43,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:29:43,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:29:43,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:29:43,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:29:43,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:29:43,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:29:43,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:29:43,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:29:43,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:29:43,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:29:43,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:29:43,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:29:43,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:29:43,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:29:43,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:29:43,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:29:43,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:29:43,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:29:43,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:29:43,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:29:43,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:29:43,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:29:43,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:29:43,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:29:43,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:29:43,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:29:43,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:29:43,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:29:43,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:29:43,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:29:43,481 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 14:29:43,515 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:29:43,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:29:43,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:29:43,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:29:43,517 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:29:43,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:29:43,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:29:43,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:29:43,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:29:43,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:29:43,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:29:43,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:29:43,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:29:43,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:29:43,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:29:43,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:29:43,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:29:43,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:29:43,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:29:43,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:29:43,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:29:43,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:29:43,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:29:43,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:29:43,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:29:43,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:29:43,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:29:43,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:29:43,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:29:43,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:29:43,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:29:43,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:29:43,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:29:43,935 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:29:43,936 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:29:43,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-queue-2.i [2020-10-28 14:29:44,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f152ba5f6/aeca962d08ca4543b8f95a659c206d04/FLAG855ddc39a [2020-10-28 14:29:44,707 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:29:44,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-queue-2.i [2020-10-28 14:29:44,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f152ba5f6/aeca962d08ca4543b8f95a659c206d04/FLAG855ddc39a [2020-10-28 14:29:44,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f152ba5f6/aeca962d08ca4543b8f95a659c206d04 [2020-10-28 14:29:45,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:29:45,012 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:29:45,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:45,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:29:45,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:29:45,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c26b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45, skipping insertion in model container [2020-10-28 14:29:45,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:29:45,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:29:45,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:45,454 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:29:45,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:45,627 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:29:45,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45 WrapperNode [2020-10-28 14:29:45,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:45,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:29:45,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:29:45,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:29:45,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:29:45,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:29:45,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:29:45,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:29:45,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (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 14:29:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:29:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:29:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:29:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:29:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:29:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:29:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:29:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:29:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:29:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:29:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:29:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:29:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:29:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:29:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:29:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:29:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:29:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:29:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:29:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:29:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:29:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:29:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:29:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:29:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:29:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:29:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:29:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:29:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:29:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:29:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:29:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:29:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:29:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:29:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:29:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:29:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:29:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:29:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:29:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:29:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:29:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:29:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:29:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:29:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:29:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:29:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:29:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:29:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:29:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:29:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:29:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:29:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:29:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:29:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:29:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:29:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:29:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:29:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:29:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:29:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:29:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:29:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:29:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:29:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:29:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:29:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:29:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:29:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:29:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:29:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:29:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:29:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:29:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:29:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:29:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:29:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:29:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:29:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:29:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:29:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:29:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:29:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:29:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:29:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:29:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:29:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:29:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:29:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:29:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:29:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:29:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:29:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:29:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:29:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:29:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:29:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:29:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:29:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:29:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:29:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:29:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:29:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:29:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:29:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:29:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:29:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:29:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:29:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:29:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:29:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:29:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:29:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:29:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:29:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:29:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:29:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:29:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:29:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:29:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:29:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:29:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:29:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:29:46,700 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:29:46,700 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-10-28 14:29:46,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:29:46 BoogieIcfgContainer [2020-10-28 14:29:46,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:29:46,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:29:46,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:29:46,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:29:46,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:29:45" (1/3) ... [2020-10-28 14:29:46,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb03a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:29:46, skipping insertion in model container [2020-10-28 14:29:46,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (2/3) ... [2020-10-28 14:29:46,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb03a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:29:46, skipping insertion in model container [2020-10-28 14:29:46,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:29:46" (3/3) ... [2020-10-28 14:29:46,712 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-queue-2.i [2020-10-28 14:29:46,725 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:29:46,730 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:29:46,744 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:29:46,773 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:29:46,773 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:29:46,773 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:29:46,774 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:29:46,774 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:29:46,774 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:29:46,774 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:29:46,774 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:29:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-10-28 14:29:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-28 14:29:46,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:46,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:46,803 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash 218866609, now seen corresponding path program 1 times [2020-10-28 14:29:46,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:46,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664772039] [2020-10-28 14:29:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:47,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:47,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:47,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:47,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:29:47,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:47,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-28 14:29:47,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:47,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:47,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:47,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:29:47,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:47,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:29:47,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:47,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:47,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:47,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:47,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:47,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:29:47,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:47,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:47,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:47,412 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 14:29:47,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664772039] [2020-10-28 14:29:47,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:47,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:29:47,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982433686] [2020-10-28 14:29:47,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:29:47,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:29:47,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:29:47,460 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2020-10-28 14:29:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:47,792 INFO L93 Difference]: Finished difference Result 168 states and 307 transitions. [2020-10-28 14:29:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:29:47,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-28 14:29:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:47,805 INFO L225 Difference]: With dead ends: 168 [2020-10-28 14:29:47,805 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:29:47,810 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 14:29:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:29:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 14:29:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:29:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2020-10-28 14:29:47,860 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 11 [2020-10-28 14:29:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:47,861 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2020-10-28 14:29:47,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:29:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2020-10-28 14:29:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:29:47,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:47,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:47,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:29:47,863 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:47,864 INFO L82 PathProgramCache]: Analyzing trace with hash 794710855, now seen corresponding path program 1 times [2020-10-28 14:29:47,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:47,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442953236] [2020-10-28 14:29:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:47,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:47,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:47,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:29:47,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:47,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-28 14:29:47,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:47,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:47,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:47,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:29:47,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:48,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:48,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:29:48,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:48,052 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 14:29:48,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442953236] [2020-10-28 14:29:48,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:48,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:48,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324585990] [2020-10-28 14:29:48,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:48,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:48,057 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 4 states. [2020-10-28 14:29:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:48,250 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-10-28 14:29:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:48,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:29:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:48,252 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:29:48,252 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 14:29:48,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 14:29:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-28 14:29:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:29:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-28 14:29:48,265 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 12 [2020-10-28 14:29:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:48,265 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-28 14:29:48,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-28 14:29:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:29:48,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:48,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:48,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:29:48,267 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1246734287, now seen corresponding path program 1 times [2020-10-28 14:29:48,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:48,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663481614] [2020-10-28 14:29:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:29:48,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-28 14:29:48,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:29:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:29:48,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:48,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:48,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:29:48,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:48,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:48,553 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 14:29:48,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663481614] [2020-10-28 14:29:48,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:48,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:48,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161834633] [2020-10-28 14:29:48,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:48,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:48,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:48,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:48,556 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 4 states. [2020-10-28 14:29:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:48,726 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-28 14:29:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:48,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 14:29:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:48,728 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:29:48,728 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:29:48,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:29:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 14:29:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:29:48,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-28 14:29:48,754 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 15 [2020-10-28 14:29:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:48,754 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-28 14:29:48,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:48,755 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-28 14:29:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:29:48,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:48,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:48,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:29:48,756 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:48,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1069993799, now seen corresponding path program 1 times [2020-10-28 14:29:48,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:48,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608299444] [2020-10-28 14:29:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:29:48,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 14:29:48,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:29:48,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:48,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:48,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:29:48,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:48,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:48,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:48,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:48,889 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 14:29:48,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608299444] [2020-10-28 14:29:48,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:48,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:48,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077028063] [2020-10-28 14:29:48,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:48,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:48,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:48,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:48,892 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 4 states. [2020-10-28 14:29:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:49,086 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-28 14:29:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:49,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:29:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:49,088 INFO L225 Difference]: With dead ends: 146 [2020-10-28 14:29:49,088 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:29:49,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:29:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-28 14:29:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 14:29:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-28 14:29:49,099 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 18 [2020-10-28 14:29:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:49,100 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-28 14:29:49,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-28 14:29:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:29:49,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:49,101 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 14:29:49,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:29:49,101 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash 937711355, now seen corresponding path program 1 times [2020-10-28 14:29:49,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:49,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382663646] [2020-10-28 14:29:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:49,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:29:49,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:49,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-28 14:29:49,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:49,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:49,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:29:49,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:49,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:29:49,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:49,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:49,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:49,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:49,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:49,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:29:49,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:49,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:49,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:49,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:49,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:49,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:49,615 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 14:29:49,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382663646] [2020-10-28 14:29:49,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:49,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:49,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498765113] [2020-10-28 14:29:49,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:49,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:49,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:49,618 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 5 states. [2020-10-28 14:29:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:49,813 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2020-10-28 14:29:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:29:49,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 14:29:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:49,814 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:29:49,815 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:29:49,815 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 14:29:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:29:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-28 14:29:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:29:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-28 14:29:49,825 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 23 [2020-10-28 14:29:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:49,826 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-28 14:29:49,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-28 14:29:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:29:49,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:49,828 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 14:29:49,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:29:49,828 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:49,830 INFO L82 PathProgramCache]: Analyzing trace with hash 309576248, now seen corresponding path program 1 times [2020-10-28 14:29:49,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:49,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826178627] [2020-10-28 14:29:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:49,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:29:50,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-28 14:29:50,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:29:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:29:50,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:29:50,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:50,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:50,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:50,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:50,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:50,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:50,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:50,231 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 14:29:50,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826178627] [2020-10-28 14:29:50,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:50,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:29:50,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276317282] [2020-10-28 14:29:50,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:29:50,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:50,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:29:50,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:29:50,236 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 7 states. [2020-10-28 14:29:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:50,555 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2020-10-28 14:29:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:50,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-28 14:29:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:50,557 INFO L225 Difference]: With dead ends: 130 [2020-10-28 14:29:50,557 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 14:29:50,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 14:29:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 84. [2020-10-28 14:29:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 14:29:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-28 14:29:50,568 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 25 [2020-10-28 14:29:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:50,568 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-28 14:29:50,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:29:50,569 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-28 14:29:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:29:50,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:50,570 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 14:29:50,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:29:50,570 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1376318958, now seen corresponding path program 1 times [2020-10-28 14:29:50,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:50,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592575294] [2020-10-28 14:29:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:29:51,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:51,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-28 14:29:51,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:51,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:29:51,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:29:51,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:51,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:51,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592575294] [2020-10-28 14:29:51,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:51,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834612463] [2020-10-28 14:29:51,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:51,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:51,086 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 4 states. [2020-10-28 14:29:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:51,301 INFO L93 Difference]: Finished difference Result 171 states and 215 transitions. [2020-10-28 14:29:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:51,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-28 14:29:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:51,303 INFO L225 Difference]: With dead ends: 171 [2020-10-28 14:29:51,304 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 14:29:51,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 14:29:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-28 14:29:51,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:29:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-10-28 14:29:51,334 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 26 [2020-10-28 14:29:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:51,334 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-10-28 14:29:51,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-10-28 14:29:51,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:29:51,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:51,337 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:51,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:29:51,338 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2123363362, now seen corresponding path program 1 times [2020-10-28 14:29:51,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:51,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672923724] [2020-10-28 14:29:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:29:51,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:51,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-28 14:29:51,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:29:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:29:51,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:51,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:51,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672923724] [2020-10-28 14:29:51,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:51,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2412704] [2020-10-28 14:29:51,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:51,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:51,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:51,759 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 4 states. [2020-10-28 14:29:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:52,015 INFO L93 Difference]: Finished difference Result 198 states and 247 transitions. [2020-10-28 14:29:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:52,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:29:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:52,018 INFO L225 Difference]: With dead ends: 198 [2020-10-28 14:29:52,018 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 14:29:52,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 14:29:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2020-10-28 14:29:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:29:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2020-10-28 14:29:52,068 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 30 [2020-10-28 14:29:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:52,069 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2020-10-28 14:29:52,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2020-10-28 14:29:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:29:52,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:52,075 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] [2020-10-28 14:29:52,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:29:52,076 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:52,077 INFO L82 PathProgramCache]: Analyzing trace with hash -84648472, now seen corresponding path program 1 times [2020-10-28 14:29:52,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:52,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506249996] [2020-10-28 14:29:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:29:52,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:52,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 642 [2020-10-28 14:29:52,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:29:52,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:29:52,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:52,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:52,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:29:52,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:52,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:29:52,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506249996] [2020-10-28 14:29:52,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:52,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:52,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053617549] [2020-10-28 14:29:52,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:52,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:52,808 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 4 states. [2020-10-28 14:29:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:53,031 INFO L93 Difference]: Finished difference Result 221 states and 274 transitions. [2020-10-28 14:29:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:53,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:29:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:53,033 INFO L225 Difference]: With dead ends: 221 [2020-10-28 14:29:53,033 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 14:29:53,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 14:29:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2020-10-28 14:29:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 14:29:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-10-28 14:29:53,042 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 33 [2020-10-28 14:29:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:53,043 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-10-28 14:29:53,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-10-28 14:29:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:29:53,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:53,044 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] [2020-10-28 14:29:53,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:29:53,044 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:53,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:53,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2040254526, now seen corresponding path program 1 times [2020-10-28 14:29:53,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:53,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562406839] [2020-10-28 14:29:53,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:29:53,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:53,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-28 14:29:53,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:29:53,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:53,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:29:53,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:53,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:53,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:53,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:29:53,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:53,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:53,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:53,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:53,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562406839] [2020-10-28 14:29:53,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:53,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:53,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276687991] [2020-10-28 14:29:53,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:53,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:53,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:53,655 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand 8 states. [2020-10-28 14:29:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:54,062 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-10-28 14:29:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:54,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 14:29:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:54,068 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:29:54,068 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 14:29:54,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:29:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 14:29:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-28 14:29:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 14:29:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-28 14:29:54,090 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 34 [2020-10-28 14:29:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:54,091 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-28 14:29:54,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-28 14:29:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:29:54,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:54,099 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:54,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:29:54,099 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1668646551, now seen corresponding path program 1 times [2020-10-28 14:29:54,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:54,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648075736] [2020-10-28 14:29:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:29:54,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-28 14:29:54,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:54,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:54,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:29:54,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:54,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:54,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:29:54,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:54,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:54,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:54,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:54,687 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 14:29:54,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648075736] [2020-10-28 14:29:54,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:54,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:54,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195669841] [2020-10-28 14:29:54,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:54,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:54,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:54,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:54,692 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 8 states. [2020-10-28 14:29:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:55,149 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2020-10-28 14:29:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:29:55,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-28 14:29:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:55,151 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:29:55,151 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 14:29:55,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:29:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 14:29:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 130. [2020-10-28 14:29:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 14:29:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2020-10-28 14:29:55,160 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 35 [2020-10-28 14:29:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:55,160 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2020-10-28 14:29:55,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2020-10-28 14:29:55,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:29:55,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:55,161 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] [2020-10-28 14:29:55,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:29:55,161 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:55,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1242507287, now seen corresponding path program 1 times [2020-10-28 14:29:55,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:55,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187454041] [2020-10-28 14:29:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:55,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:55,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:29:55,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:55,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-28 14:29:55,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:55,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:55,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:29:55,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:55,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:29:55,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:55,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:55,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:55,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:55,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:55,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:55,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:55,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:55,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:55,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:55,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:55,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:55,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187454041] [2020-10-28 14:29:55,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:55,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:55,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929495580] [2020-10-28 14:29:55,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:55,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:55,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:55,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:55,745 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand 8 states. [2020-10-28 14:29:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:56,245 INFO L93 Difference]: Finished difference Result 169 states and 197 transitions. [2020-10-28 14:29:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:29:56,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-28 14:29:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:56,247 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:29:56,247 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 14:29:56,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:29:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 14:29:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2020-10-28 14:29:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 14:29:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2020-10-28 14:29:56,258 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 37 [2020-10-28 14:29:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:56,259 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2020-10-28 14:29:56,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2020-10-28 14:29:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:29:56,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:56,260 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:56,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:29:56,260 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:56,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:56,260 INFO L82 PathProgramCache]: Analyzing trace with hash -28871154, now seen corresponding path program 1 times [2020-10-28 14:29:56,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:56,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071099564] [2020-10-28 14:29:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:56,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:56,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:57,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:29:57,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:57,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-28 14:29:57,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:57,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:57,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:57,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:29:57,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:29:57,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:57,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:57,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:57,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:57,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:57,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:57,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:57,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:57,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 14:29:57,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071099564] [2020-10-28 14:29:57,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:57,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:57,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303316178] [2020-10-28 14:29:57,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:57,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:57,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:57,176 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand 4 states. [2020-10-28 14:29:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:57,478 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2020-10-28 14:29:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:57,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 14:29:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:57,480 INFO L225 Difference]: With dead ends: 211 [2020-10-28 14:29:57,480 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 14:29:57,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:57,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 14:29:57,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-10-28 14:29:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:29:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2020-10-28 14:29:57,492 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 42 [2020-10-28 14:29:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:57,493 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2020-10-28 14:29:57,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2020-10-28 14:29:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:29:57,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:57,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:57,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:29:57,495 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:57,496 INFO L82 PathProgramCache]: Analyzing trace with hash 989426657, now seen corresponding path program 1 times [2020-10-28 14:29:57,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:57,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22833336] [2020-10-28 14:29:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:57,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:58,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:29:58,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:29:58,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1311 [2020-10-28 14:29:58,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:58,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:58,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:29:58,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:29:58,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:29:58,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:58,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:58,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:58,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:58,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:58,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:58,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:58,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:58,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:58,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:58,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:58,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22833336] [2020-10-28 14:29:58,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:58,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:58,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275491884] [2020-10-28 14:29:58,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:58,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:58,918 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 5 states. [2020-10-28 14:29:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:59,151 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2020-10-28 14:29:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:29:59,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-28 14:29:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:59,153 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:29:59,153 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:29:59,154 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 14:29:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:29:59,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-28 14:29:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:29:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-28 14:29:59,170 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 43 [2020-10-28 14:29:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:59,170 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-28 14:29:59,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-28 14:29:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:29:59,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:59,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:59,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:29:59,172 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:59,172 INFO L82 PathProgramCache]: Analyzing trace with hash 402620643, now seen corresponding path program 1 times [2020-10-28 14:29:59,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:59,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139860388] [2020-10-28 14:29:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:59,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:29:59,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:59,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-28 14:29:59,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:29:59,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:59,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:29:59,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:59,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:59,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:59,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:59,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:29:59,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:59,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139860388] [2020-10-28 14:29:59,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:59,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:29:59,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584960741] [2020-10-28 14:29:59,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:29:59,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:59,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:29:59,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:29:59,619 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2020-10-28 14:30:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:00,103 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-10-28 14:30:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:00,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-28 14:30:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:00,105 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:30:00,105 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:30:00,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:30:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 14:30:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:30:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-28 14:30:00,118 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 43 [2020-10-28 14:30:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:00,120 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-28 14:30:00,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-28 14:30:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:30:00,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:00,121 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:00,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:30:00,121 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash -579609298, now seen corresponding path program 1 times [2020-10-28 14:30:00,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:00,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478557082] [2020-10-28 14:30:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:00,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:00,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:30:00,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:00,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-28 14:30:00,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:00,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:30:00,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:00,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:00,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:00,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:00,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:00,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:00,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:00,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:00,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:00,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:00,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:00,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:30:00,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478557082] [2020-10-28 14:30:00,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:00,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:30:00,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132011901] [2020-10-28 14:30:00,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:00,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:00,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:00,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:00,938 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 8 states. [2020-10-28 14:30:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:01,233 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-28 14:30:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:30:01,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-28 14:30:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:01,234 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:30:01,234 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 14:30:01,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 14:30:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-28 14:30:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:30:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-28 14:30:01,244 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 44 [2020-10-28 14:30:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:01,244 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-28 14:30:01,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-28 14:30:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:30:01,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:01,245 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:01,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:30:01,246 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1664297424, now seen corresponding path program 1 times [2020-10-28 14:30:01,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:01,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166809997] [2020-10-28 14:30:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:01,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:01,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:01,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:30:01,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:01,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-28 14:30:01,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:01,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:30:01,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:01,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:01,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:01,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:01,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:01,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:01,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:01,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:01,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:01,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:01,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:01,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166809997] [2020-10-28 14:30:01,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:01,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:01,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364276174] [2020-10-28 14:30:01,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:01,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:01,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:01,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:01,977 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 10 states. [2020-10-28 14:30:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:02,457 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-10-28 14:30:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:02,458 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-28 14:30:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:02,458 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:30:02,459 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:30:02,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:30:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-28 14:30:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:30:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-28 14:30:02,466 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 46 [2020-10-28 14:30:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:02,467 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-28 14:30:02,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-28 14:30:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:30:02,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:02,468 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:02,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:30:02,468 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash -501133880, now seen corresponding path program 1 times [2020-10-28 14:30:02,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:02,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467224618] [2020-10-28 14:30:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:02,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:02,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:03,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:03,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:30:03,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:03,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-28 14:30:03,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:03,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:03,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:30:03,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:30:03,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:30:03,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:03,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:03,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:03,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:03,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:03,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:03,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:03,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:03,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:03,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:03,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:03,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:03,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 14:30:03,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467224618] [2020-10-28 14:30:03,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:03,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:30:03,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637304929] [2020-10-28 14:30:03,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:30:03,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:03,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:30:03,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:03,535 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 4 states. [2020-10-28 14:30:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:03,773 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-10-28 14:30:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:30:03,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-28 14:30:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:03,775 INFO L225 Difference]: With dead ends: 112 [2020-10-28 14:30:03,775 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:30:03,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:30:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-28 14:30:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:30:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-10-28 14:30:03,791 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 47 [2020-10-28 14:30:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:03,792 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-10-28 14:30:03,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:30:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-10-28 14:30:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:30:03,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:03,793 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:03,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:30:03,793 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:03,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1666759241, now seen corresponding path program 1 times [2020-10-28 14:30:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:03,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263892848] [2020-10-28 14:30:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:03,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:04,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:04,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:30:04,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:04,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-28 14:30:04,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:04,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:04,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:04,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:04,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:30:04,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:04,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:04,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:04,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:04,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:04,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:04,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:04,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:04,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:04,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:04,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:04,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:04,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:04,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263892848] [2020-10-28 14:30:04,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:04,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:04,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411334531] [2020-10-28 14:30:04,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:04,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:04,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:04,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:04,640 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 9 states. [2020-10-28 14:30:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:05,025 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-28 14:30:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:30:05,026 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-28 14:30:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:05,027 INFO L225 Difference]: With dead ends: 90 [2020-10-28 14:30:05,027 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 14:30:05,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 14:30:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-28 14:30:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 14:30:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-28 14:30:05,037 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 47 [2020-10-28 14:30:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:05,038 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-28 14:30:05,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-28 14:30:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:30:05,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:05,038 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:05,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:30:05,039 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:05,039 INFO L82 PathProgramCache]: Analyzing trace with hash -127104064, now seen corresponding path program 1 times [2020-10-28 14:30:05,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:05,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375473758] [2020-10-28 14:30:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:05,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:05,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:05,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:30:05,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:05,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-28 14:30:05,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:05,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:05,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:05,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:05,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:05,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:05,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:05,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:05,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:05,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:05,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:05,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:05,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375473758] [2020-10-28 14:30:05,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:05,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:05,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089827424] [2020-10-28 14:30:05,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:05,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:05,896 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 9 states. [2020-10-28 14:30:06,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:06,512 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2020-10-28 14:30:06,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:06,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-28 14:30:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:06,514 INFO L225 Difference]: With dead ends: 129 [2020-10-28 14:30:06,514 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:30:06,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:30:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-10-28 14:30:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:30:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2020-10-28 14:30:06,524 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 50 [2020-10-28 14:30:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:06,524 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2020-10-28 14:30:06,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2020-10-28 14:30:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:30:06,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:06,525 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:06,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:30:06,526 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2035219383, now seen corresponding path program 1 times [2020-10-28 14:30:06,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:06,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537861914] [2020-10-28 14:30:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:30:06,580 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:30:06,581 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:30:06,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:30:06,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:30:06 BoogieIcfgContainer [2020-10-28 14:30:06,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:30:06,612 INFO L168 Benchmark]: Toolchain (without parser) took 21603.65 ms. Allocated memory was 152.0 MB in the beginning and 386.9 MB in the end (delta: 234.9 MB). Free memory was 127.2 MB in the beginning and 239.6 MB in the end (delta: -112.4 MB). Peak memory consumption was 123.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:06,612 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 125.8 MB. Free memory is still 101.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:30:06,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.30 ms. Allocated memory is still 152.0 MB. Free memory was 126.6 MB in the beginning and 103.6 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:06,613 INFO L168 Benchmark]: Boogie Preprocessor took 152.12 ms. Allocated memory is still 152.0 MB. Free memory was 103.6 MB in the beginning and 134.0 MB in the end (delta: -30.4 MB). Peak memory consumption was 6.2 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:06,614 INFO L168 Benchmark]: RCFGBuilder took 918.96 ms. Allocated memory is still 152.0 MB. Free memory was 134.0 MB in the beginning and 123.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 46.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:06,615 INFO L168 Benchmark]: TraceAbstraction took 19904.77 ms. Allocated memory was 152.0 MB in the beginning and 386.9 MB in the end (delta: 234.9 MB). Free memory was 123.1 MB in the beginning and 239.6 MB in the end (delta: -116.5 MB). Peak memory consumption was 117.9 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:06,617 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 125.8 MB. Free memory is still 101.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 616.30 ms. Allocated memory is still 152.0 MB. Free memory was 126.6 MB in the beginning and 103.6 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 152.12 ms. Allocated memory is still 152.0 MB. Free memory was 103.6 MB in the beginning and 134.0 MB in the end (delta: -30.4 MB). Peak memory consumption was 6.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 918.96 ms. Allocated memory is still 152.0 MB. Free memory was 134.0 MB in the beginning and 123.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 46.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19904.77 ms. Allocated memory was 152.0 MB in the beginning and 386.9 MB in the end (delta: 234.9 MB). Free memory was 123.1 MB in the beginning and 239.6 MB in the end (delta: -116.5 MB). Peak memory consumption was 117.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] head->data = 0 [L1001] SLL* item = head; [L1002] int status = 0; [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND TRUE !status [L1013] item->data = 1 [L1014] status = 1 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND FALSE !(!status) [L1016] COND TRUE status == 1 [L1018] item->data = 2 [L1019] status = 2 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND FALSE !(!status) [L1016] COND FALSE !(status == 1) [L1021] COND TRUE status >= 2 [L1023] item->data = 3 [L1024] status = 3 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1031] COND FALSE !(!(head != ((void*)0))) [L1032] COND FALSE !(status == 1) [L1037] COND FALSE !(status == 2) [L1043] COND TRUE status == 3 [L1045] COND FALSE !(!(head != ((void*)0))) [L1046] EXPR head->next [L1046] COND FALSE !(!(head->next != ((void*)0))) [L1047] EXPR head->next [L1047] EXPR head->next->next [L1047] COND FALSE !(!(head->next->next != ((void*)0))) [L1048] EXPR head->next [L1048] EXPR head->next->next [L1048] EXPR head->next->next->next [L1048] COND FALSE !(!(head->next->next->next != ((void*)0))) [L1049] EXPR head->next [L1049] EXPR head->next->next [L1049] EXPR head->next->next->next [L1049] EXPR head->next->next->next->data [L1049] COND TRUE !(head->next->next->next->data != 3) [L1049] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-queue-2.c", 16, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.8s, OverallIterations: 21, TraceHistogramMax: 4, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1424 SDtfs, 854 SDslu, 2693 SDs, 0 SdLazy, 3066 SolverSat, 267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 170 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 714 NumberOfCodeBlocks, 714 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 641 ConstructedInterpolants, 0 QuantifiedInterpolants, 311123 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 11 PerfectInterpolantSequences, 90/208 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...