/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:35:46,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:35:46,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:35:46,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:35:46,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:35:46,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:35:46,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:35:46,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:35:46,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:35:46,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:35:46,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:35:46,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:35:46,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:35:46,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:35:46,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:35:46,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:35:46,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:35:46,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:35:46,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:35:46,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:35:46,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:35:46,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:35:46,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:35:46,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:35:46,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:35:46,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:35:46,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:35:46,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:35:46,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:35:46,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:35:46,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:35:46,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:35:46,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:35:46,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:35:46,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:35:46,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:35:46,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:35:46,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:35:46,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:35:46,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:35:46,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:35:46,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:35:46,767 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:35:46,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:35:46,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:35:46,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:35:46,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:35:46,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:35:46,769 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:35:46,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:35:46,769 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:35:46,769 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:35:46,769 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:35:46,769 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:35:46,770 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:35:46,770 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:35:46,770 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:35:46,770 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:35:46,770 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:35:46,770 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:35:46,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:35:46,771 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:35:46,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:35:46,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:35:46,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:35:46,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:35:46,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:35:46,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:35:46,772 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:35:46,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:35:46,772 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:35:46,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:35:46,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:35:46,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:35:46,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:35:46,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:35:46,772 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:35:46,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:35:46,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:35:46,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:35:46,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:35:46,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:35:46,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:35:46,773 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:35:46,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:35:46,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:35:46,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:35:46,996 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:35:46,996 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:35:46,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2023-04-01 05:35:48,131 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:35:48,383 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:35:48,384 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2023-04-01 05:35:48,397 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6924a2c84/28f12ea9fb0f4779884a14df3ff1bb1a/FLAG08207e144 [2023-04-01 05:35:48,407 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6924a2c84/28f12ea9fb0f4779884a14df3ff1bb1a [2023-04-01 05:35:48,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:35:48,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:35:48,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:35:48,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:35:48,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:35:48,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:48,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d1e4e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48, skipping insertion in model container [2023-04-01 05:35:48,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:48,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:35:48,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:35:48,675 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2023-04-01 05:35:48,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:35:48,752 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:35:48,826 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2023-04-01 05:35:48,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:35:48,906 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:35:48,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48 WrapperNode [2023-04-01 05:35:48,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:35:48,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:35:48,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:35:48,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:35:48,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:48,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:48,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:48,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:48,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:48,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:48,982 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:48,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:49,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:35:49,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:35:49,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:35:49,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:35:49,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (1/1) ... [2023-04-01 05:35:49,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:35:49,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:35:49,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:35:49,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:35:49,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:35:49,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:35:49,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:35:49,143 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:35:49,144 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 05:35:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 05:35:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:35:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 05:35:49,148 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 05:35:49,148 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 05:35:49,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-01 05:35:49,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-01 05:35:49,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-01 05:35:49,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-01 05:35:49,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:35:49,149 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 05:35:49,149 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 05:35:49,149 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 05:35:49,149 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 05:35:49,150 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 05:35:49,150 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 05:35:49,150 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 05:35:49,150 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 05:35:49,150 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 05:35:49,151 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 05:35:49,151 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 05:35:49,151 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 05:35:49,151 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 05:35:49,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 05:35:49,151 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 05:35:49,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 05:35:49,152 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 05:35:49,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:35:49,152 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:35:49,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:35:49,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:35:49,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:35:49,153 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:35:49,154 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:35:49,154 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:35:49,154 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:35:49,154 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:35:49,154 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 05:35:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 05:35:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 05:35:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 05:35:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 05:35:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 05:35:49,158 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 05:35:49,158 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 05:35:49,158 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 05:35:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 05:35:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 05:35:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 05:35:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 05:35:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 05:35:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 05:35:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:35:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 05:35:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 05:35:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 05:35:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 05:35:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 05:35:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-01 05:35:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 05:35:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 05:35:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 05:35:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 05:35:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:35:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:35:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:35:49,440 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:35:49,443 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:35:50,476 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:35:51,118 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:35:51,119 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 05:35:51,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:35:51 BoogieIcfgContainer [2023-04-01 05:35:51,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:35:51,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:35:51,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:35:51,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:35:51,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:35:48" (1/3) ... [2023-04-01 05:35:51,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c778f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:35:51, skipping insertion in model container [2023-04-01 05:35:51,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:35:48" (2/3) ... [2023-04-01 05:35:51,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c778f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:35:51, skipping insertion in model container [2023-04-01 05:35:51,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:35:51" (3/3) ... [2023-04-01 05:35:51,130 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product21.cil.c [2023-04-01 05:35:51,143 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:35:51,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:35:51,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:35:51,200 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@43ef62f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:35:51,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:35:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 567 states, 332 states have (on average 1.4909638554216869) internal successors, (495), 359 states have internal predecessors, (495), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 163 states have call predecessors, (172), 172 states have call successors, (172) [2023-04-01 05:35:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 05:35:51,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:35:51,227 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 05:35:51,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:35:51,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:35:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1491857156, now seen corresponding path program 1 times [2023-04-01 05:35:51,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:35:51,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295765513] [2023-04-01 05:35:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:35:51,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:35:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:35:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:35:52,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:35:52,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295765513] [2023-04-01 05:35:52,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295765513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:35:52,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:35:52,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 05:35:52,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568642341] [2023-04-01 05:35:52,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:35:52,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:35:52,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:35:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:35:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:35:52,271 INFO L87 Difference]: Start difference. First operand has 567 states, 332 states have (on average 1.4909638554216869) internal successors, (495), 359 states have internal predecessors, (495), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 163 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 05:35:55,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:35:55,164 INFO L93 Difference]: Finished difference Result 1394 states and 2144 transitions. [2023-04-01 05:35:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 05:35:55,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) Word has length 106 [2023-04-01 05:35:55,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:35:55,180 INFO L225 Difference]: With dead ends: 1394 [2023-04-01 05:35:55,180 INFO L226 Difference]: Without dead ends: 975 [2023-04-01 05:35:55,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:35:55,187 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1808 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 5259 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 5834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 5259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:35:55,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1883 Valid, 938 Invalid, 5834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 5259 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 05:35:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2023-04-01 05:35:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 943. [2023-04-01 05:35:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 627 states have (on average 1.5598086124401913) internal successors, (978), 658 states have internal predecessors, (978), 232 states have call successors, (232), 82 states have call predecessors, (232), 83 states have return successors, (236), 226 states have call predecessors, (236), 224 states have call successors, (236) [2023-04-01 05:35:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1446 transitions. [2023-04-01 05:35:55,311 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1446 transitions. Word has length 106 [2023-04-01 05:35:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:35:55,312 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1446 transitions. [2023-04-01 05:35:55,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 05:35:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1446 transitions. [2023-04-01 05:35:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 05:35:55,316 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:35:55,317 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:35:55,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:35:55,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:35:55,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:35:55,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2011034527, now seen corresponding path program 1 times [2023-04-01 05:35:55,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:35:55,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714112579] [2023-04-01 05:35:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:35:55,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:35:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:35:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:35:55,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:35:55,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714112579] [2023-04-01 05:35:55,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714112579] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:35:55,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:35:55,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:35:55,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340422676] [2023-04-01 05:35:55,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:35:55,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:35:55,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:35:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:35:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:35:55,558 INFO L87 Difference]: Start difference. First operand 943 states and 1446 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 05:35:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:35:55,727 INFO L93 Difference]: Finished difference Result 1509 states and 2328 transitions. [2023-04-01 05:35:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:35:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 112 [2023-04-01 05:35:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:35:55,733 INFO L225 Difference]: With dead ends: 1509 [2023-04-01 05:35:55,733 INFO L226 Difference]: Without dead ends: 980 [2023-04-01 05:35:55,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:35:55,736 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 6 mSDsluCounter, 3053 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:35:55,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3673 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:35:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2023-04-01 05:35:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 964. [2023-04-01 05:35:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 642 states have (on average 1.5467289719626167) internal successors, (993), 673 states have internal predecessors, (993), 232 states have call successors, (232), 82 states have call predecessors, (232), 89 states have return successors, (251), 232 states have call predecessors, (251), 224 states have call successors, (251) [2023-04-01 05:35:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1476 transitions. [2023-04-01 05:35:55,812 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1476 transitions. Word has length 112 [2023-04-01 05:35:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:35:55,813 INFO L495 AbstractCegarLoop]: Abstraction has 964 states and 1476 transitions. [2023-04-01 05:35:55,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 05:35:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1476 transitions. [2023-04-01 05:35:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 05:35:55,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:35:55,816 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:35:55,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:35:55,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:35:55,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:35:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash -817311297, now seen corresponding path program 1 times [2023-04-01 05:35:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:35:55,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433465392] [2023-04-01 05:35:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:35:55,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:35:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:35:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:35:56,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:35:56,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433465392] [2023-04-01 05:35:56,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433465392] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:35:56,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:35:56,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:35:56,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625226329] [2023-04-01 05:35:56,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:35:56,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:35:56,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:35:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:35:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:35:56,047 INFO L87 Difference]: Start difference. First operand 964 states and 1476 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 05:35:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:35:56,215 INFO L93 Difference]: Finished difference Result 1538 states and 2366 transitions. [2023-04-01 05:35:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:35:56,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 112 [2023-04-01 05:35:56,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:35:56,220 INFO L225 Difference]: With dead ends: 1538 [2023-04-01 05:35:56,220 INFO L226 Difference]: Without dead ends: 995 [2023-04-01 05:35:56,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:35:56,222 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 6 mSDsluCounter, 3053 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:35:56,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3673 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:35:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2023-04-01 05:35:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 967. [2023-04-01 05:35:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 645 states have (on average 1.544186046511628) internal successors, (996), 673 states have internal predecessors, (996), 232 states have call successors, (232), 82 states have call predecessors, (232), 89 states have return successors, (251), 235 states have call predecessors, (251), 224 states have call successors, (251) [2023-04-01 05:35:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1479 transitions. [2023-04-01 05:35:56,260 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1479 transitions. Word has length 112 [2023-04-01 05:35:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:35:56,261 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1479 transitions. [2023-04-01 05:35:56,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 05:35:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1479 transitions. [2023-04-01 05:35:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 05:35:56,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:35:56,263 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:35:56,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:35:56,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:35:56,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:35:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash -523679998, now seen corresponding path program 1 times [2023-04-01 05:35:56,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:35:56,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543421893] [2023-04-01 05:35:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:35:56,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:35:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:35:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:35:56,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:35:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543421893] [2023-04-01 05:35:56,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543421893] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:35:56,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:35:56,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:35:56,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746913311] [2023-04-01 05:35:56,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:35:56,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:35:56,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:35:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:35:56,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:35:56,465 INFO L87 Difference]: Start difference. First operand 967 states and 1479 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 05:35:56,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:35:56,626 INFO L93 Difference]: Finished difference Result 1543 states and 2371 transitions. [2023-04-01 05:35:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:35:56,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 111 [2023-04-01 05:35:56,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:35:56,630 INFO L225 Difference]: With dead ends: 1543 [2023-04-01 05:35:56,631 INFO L226 Difference]: Without dead ends: 998 [2023-04-01 05:35:56,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:35:56,633 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 7 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:35:56,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3649 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:35:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2023-04-01 05:35:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 970. [2023-04-01 05:35:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 648 states have (on average 1.5416666666666667) internal successors, (999), 673 states have internal predecessors, (999), 232 states have call successors, (232), 82 states have call predecessors, (232), 89 states have return successors, (251), 238 states have call predecessors, (251), 224 states have call successors, (251) [2023-04-01 05:35:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1482 transitions. [2023-04-01 05:35:56,666 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1482 transitions. Word has length 111 [2023-04-01 05:35:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:35:56,667 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1482 transitions. [2023-04-01 05:35:56,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 05:35:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1482 transitions. [2023-04-01 05:35:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-01 05:35:56,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:35:56,669 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:35:56,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:35:56,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:35:56,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:35:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1680843399, now seen corresponding path program 1 times [2023-04-01 05:35:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:35:56,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168500933] [2023-04-01 05:35:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:35:56,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:35:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:35:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:35:56,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:35:56,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168500933] [2023-04-01 05:35:56,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168500933] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:35:56,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:35:56,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:35:56,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908974324] [2023-04-01 05:35:56,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:35:56,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:35:56,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:35:56,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:35:56,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:35:56,994 INFO L87 Difference]: Start difference. First operand 970 states and 1482 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-01 05:35:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:35:59,059 INFO L93 Difference]: Finished difference Result 2080 states and 3197 transitions. [2023-04-01 05:35:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:35:59,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) Word has length 116 [2023-04-01 05:35:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:35:59,067 INFO L225 Difference]: With dead ends: 2080 [2023-04-01 05:35:59,068 INFO L226 Difference]: Without dead ends: 1408 [2023-04-01 05:35:59,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:35:59,071 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 2566 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 2837 mSolverCounterSat, 1041 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2746 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 3878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1041 IncrementalHoareTripleChecker+Valid, 2837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 05:35:59,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2746 Valid, 370 Invalid, 3878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1041 Valid, 2837 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 05:35:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2023-04-01 05:35:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1358. [2023-04-01 05:35:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 890 states have (on average 1.4955056179775281) internal successors, (1331), 930 states have internal predecessors, (1331), 334 states have call successors, (334), 122 states have call predecessors, (334), 133 states have return successors, (371), 341 states have call predecessors, (371), 326 states have call successors, (371) [2023-04-01 05:35:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 2036 transitions. [2023-04-01 05:35:59,130 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 2036 transitions. Word has length 116 [2023-04-01 05:35:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:35:59,130 INFO L495 AbstractCegarLoop]: Abstraction has 1358 states and 2036 transitions. [2023-04-01 05:35:59,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-01 05:35:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 2036 transitions. [2023-04-01 05:35:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 05:35:59,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:35:59,132 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:35:59,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:35:59,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:35:59,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:35:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1749536806, now seen corresponding path program 1 times [2023-04-01 05:35:59,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:35:59,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131130560] [2023-04-01 05:35:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:35:59,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:35:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:35:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:35:59,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:35:59,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131130560] [2023-04-01 05:35:59,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131130560] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:35:59,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:35:59,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 05:35:59,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491698284] [2023-04-01 05:35:59,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:35:59,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:35:59,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:35:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:35:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:35:59,441 INFO L87 Difference]: Start difference. First operand 1358 states and 2036 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 05:35:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:35:59,807 INFO L93 Difference]: Finished difference Result 2646 states and 4067 transitions. [2023-04-01 05:35:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:35:59,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 118 [2023-04-01 05:35:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:35:59,815 INFO L225 Difference]: With dead ends: 2646 [2023-04-01 05:35:59,815 INFO L226 Difference]: Without dead ends: 1562 [2023-04-01 05:35:59,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-01 05:35:59,821 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 246 mSDsluCounter, 4187 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 4823 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:35:59,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 4823 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:35:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2023-04-01 05:35:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1562. [2023-04-01 05:35:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1078 states have (on average 1.507421150278293) internal successors, (1625), 1124 states have internal predecessors, (1625), 339 states have call successors, (339), 127 states have call predecessors, (339), 144 states have return successors, (376), 346 states have call predecessors, (376), 331 states have call successors, (376) [2023-04-01 05:35:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2340 transitions. [2023-04-01 05:35:59,890 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2340 transitions. Word has length 118 [2023-04-01 05:35:59,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:35:59,890 INFO L495 AbstractCegarLoop]: Abstraction has 1562 states and 2340 transitions. [2023-04-01 05:35:59,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 05:35:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2340 transitions. [2023-04-01 05:35:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 05:35:59,893 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:35:59,893 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:35:59,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 05:35:59,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:35:59,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:35:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash 75638369, now seen corresponding path program 1 times [2023-04-01 05:35:59,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:35:59,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856103002] [2023-04-01 05:35:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:35:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:35:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:36:00,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:00,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856103002] [2023-04-01 05:36:00,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856103002] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:00,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:00,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:36:00,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62429295] [2023-04-01 05:36:00,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:00,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:36:00,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:00,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:36:00,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:36:00,233 INFO L87 Difference]: Start difference. First operand 1562 states and 2340 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 05:36:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:02,451 INFO L93 Difference]: Finished difference Result 6237 states and 9667 transitions. [2023-04-01 05:36:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:36:02,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 119 [2023-04-01 05:36:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:02,477 INFO L225 Difference]: With dead ends: 6237 [2023-04-01 05:36:02,478 INFO L226 Difference]: Without dead ends: 4718 [2023-04-01 05:36:02,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:36:02,489 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 2191 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2268 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 4009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:02,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2268 Valid, 929 Invalid, 4009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 05:36:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2023-04-01 05:36:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 4421. [2023-04-01 05:36:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4421 states, 3101 states have (on average 1.506610770719123) internal successors, (4672), 3233 states have internal predecessors, (4672), 921 states have call successors, (921), 332 states have call predecessors, (921), 398 states have return successors, (1158), 942 states have call predecessors, (1158), 913 states have call successors, (1158) [2023-04-01 05:36:02,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 6751 transitions. [2023-04-01 05:36:02,764 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 6751 transitions. Word has length 119 [2023-04-01 05:36:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:02,765 INFO L495 AbstractCegarLoop]: Abstraction has 4421 states and 6751 transitions. [2023-04-01 05:36:02,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 05:36:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 6751 transitions. [2023-04-01 05:36:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 05:36:02,768 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:02,768 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:36:02,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 05:36:02,768 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:02,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -997623116, now seen corresponding path program 1 times [2023-04-01 05:36:02,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:02,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964799053] [2023-04-01 05:36:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:36:03,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:03,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964799053] [2023-04-01 05:36:03,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964799053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:03,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:03,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:36:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823928586] [2023-04-01 05:36:03,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:03,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:36:03,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:03,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:36:03,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:36:03,142 INFO L87 Difference]: Start difference. First operand 4421 states and 6751 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 05:36:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:05,125 INFO L93 Difference]: Finished difference Result 7945 states and 12198 transitions. [2023-04-01 05:36:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:36:05,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 121 [2023-04-01 05:36:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:05,151 INFO L225 Difference]: With dead ends: 7945 [2023-04-01 05:36:05,151 INFO L226 Difference]: Without dead ends: 4591 [2023-04-01 05:36:05,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:36:05,168 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1047 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:05,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 519 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 3353 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 05:36:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2023-04-01 05:36:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 4505. [2023-04-01 05:36:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 3156 states have (on average 1.5015842839036755) internal successors, (4739), 3300 states have internal predecessors, (4739), 925 states have call successors, (925), 347 states have call predecessors, (925), 423 states have return successors, (1193), 944 states have call predecessors, (1193), 917 states have call successors, (1193) [2023-04-01 05:36:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 6857 transitions. [2023-04-01 05:36:05,421 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 6857 transitions. Word has length 121 [2023-04-01 05:36:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:05,422 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 6857 transitions. [2023-04-01 05:36:05,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 05:36:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 6857 transitions. [2023-04-01 05:36:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 05:36:05,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:05,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:36:05,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 05:36:05,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:05,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1822250551, now seen corresponding path program 1 times [2023-04-01 05:36:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:05,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239518406] [2023-04-01 05:36:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:05,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 05:36:05,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:05,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239518406] [2023-04-01 05:36:05,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239518406] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:05,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:05,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:36:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88059977] [2023-04-01 05:36:05,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:05,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:36:05,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:36:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:36:05,639 INFO L87 Difference]: Start difference. First operand 4505 states and 6857 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:36:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:06,238 INFO L93 Difference]: Finished difference Result 4560 states and 6945 transitions. [2023-04-01 05:36:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:36:06,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 125 [2023-04-01 05:36:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:06,258 INFO L225 Difference]: With dead ends: 4560 [2023-04-01 05:36:06,258 INFO L226 Difference]: Without dead ends: 4543 [2023-04-01 05:36:06,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:36:06,261 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 657 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:06,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 1986 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 05:36:06,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2023-04-01 05:36:06,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4511. [2023-04-01 05:36:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 3162 states have (on average 1.5006325110689438) internal successors, (4745), 3306 states have internal predecessors, (4745), 925 states have call successors, (925), 347 states have call predecessors, (925), 423 states have return successors, (1193), 944 states have call predecessors, (1193), 917 states have call successors, (1193) [2023-04-01 05:36:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 6863 transitions. [2023-04-01 05:36:06,508 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 6863 transitions. Word has length 125 [2023-04-01 05:36:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:06,508 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 6863 transitions. [2023-04-01 05:36:06,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:36:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 6863 transitions. [2023-04-01 05:36:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-01 05:36:06,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:06,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:36:06,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 05:36:06,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:06,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:06,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1777065935, now seen corresponding path program 1 times [2023-04-01 05:36:06,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:06,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362647032] [2023-04-01 05:36:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:06,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 05:36:06,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362647032] [2023-04-01 05:36:06,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362647032] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:06,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:06,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:36:06,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284431344] [2023-04-01 05:36:06,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:06,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:36:06,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:06,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:36:06,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:36:06,734 INFO L87 Difference]: Start difference. First operand 4511 states and 6863 transitions. Second operand has 8 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-01 05:36:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:07,051 INFO L93 Difference]: Finished difference Result 4534 states and 6892 transitions. [2023-04-01 05:36:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:36:07,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) Word has length 130 [2023-04-01 05:36:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:07,070 INFO L225 Difference]: With dead ends: 4534 [2023-04-01 05:36:07,071 INFO L226 Difference]: Without dead ends: 4517 [2023-04-01 05:36:07,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:36:07,074 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 10 mSDsluCounter, 3647 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4258 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:07,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4258 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:36:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2023-04-01 05:36:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4511. [2023-04-01 05:36:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 3162 states have (on average 1.4981024667931688) internal successors, (4737), 3306 states have internal predecessors, (4737), 925 states have call successors, (925), 347 states have call predecessors, (925), 423 states have return successors, (1193), 944 states have call predecessors, (1193), 917 states have call successors, (1193) [2023-04-01 05:36:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 6855 transitions. [2023-04-01 05:36:07,327 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 6855 transitions. Word has length 130 [2023-04-01 05:36:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:07,328 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 6855 transitions. [2023-04-01 05:36:07,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-01 05:36:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 6855 transitions. [2023-04-01 05:36:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 05:36:07,331 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:07,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 05:36:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 05:36:07,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:07,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash -649140589, now seen corresponding path program 1 times [2023-04-01 05:36:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:07,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806278443] [2023-04-01 05:36:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:36:07,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806278443] [2023-04-01 05:36:07,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806278443] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:07,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:07,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:36:07,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36348697] [2023-04-01 05:36:07,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:07,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:36:07,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:07,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:36:07,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:36:07,597 INFO L87 Difference]: Start difference. First operand 4511 states and 6855 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 05:36:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:09,072 INFO L93 Difference]: Finished difference Result 13598 states and 21008 transitions. [2023-04-01 05:36:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:36:09,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 144 [2023-04-01 05:36:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:09,118 INFO L225 Difference]: With dead ends: 13598 [2023-04-01 05:36:09,119 INFO L226 Difference]: Without dead ends: 9132 [2023-04-01 05:36:09,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:36:09,139 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1217 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:09,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 507 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 05:36:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9132 states. [2023-04-01 05:36:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9132 to 8824. [2023-04-01 05:36:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8824 states, 6238 states have (on average 1.501763385700545) internal successors, (9368), 6531 states have internal predecessors, (9368), 1743 states have call successors, (1743), 655 states have call predecessors, (1743), 842 states have return successors, (2440), 1775 states have call predecessors, (2440), 1734 states have call successors, (2440) [2023-04-01 05:36:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8824 states to 8824 states and 13551 transitions. [2023-04-01 05:36:09,647 INFO L78 Accepts]: Start accepts. Automaton has 8824 states and 13551 transitions. Word has length 144 [2023-04-01 05:36:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:09,648 INFO L495 AbstractCegarLoop]: Abstraction has 8824 states and 13551 transitions. [2023-04-01 05:36:09,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 05:36:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8824 states and 13551 transitions. [2023-04-01 05:36:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 05:36:09,651 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:09,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 05:36:09,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 05:36:09,652 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:09,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1349901977, now seen corresponding path program 1 times [2023-04-01 05:36:09,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:09,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910052842] [2023-04-01 05:36:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:09,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:36:09,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910052842] [2023-04-01 05:36:09,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910052842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:09,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:09,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:36:09,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912802673] [2023-04-01 05:36:09,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:09,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:36:09,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:09,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:36:09,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:36:09,917 INFO L87 Difference]: Start difference. First operand 8824 states and 13551 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 05:36:11,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:11,903 INFO L93 Difference]: Finished difference Result 26525 states and 41635 transitions. [2023-04-01 05:36:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:36:11,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 145 [2023-04-01 05:36:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:12,133 INFO L225 Difference]: With dead ends: 26525 [2023-04-01 05:36:12,134 INFO L226 Difference]: Without dead ends: 17749 [2023-04-01 05:36:12,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:36:12,165 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1213 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:12,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 512 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 05:36:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17749 states. [2023-04-01 05:36:13,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17749 to 17354. [2023-04-01 05:36:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17354 states, 12339 states have (on average 1.50206661804036) internal successors, (18534), 12938 states have internal predecessors, (18534), 3310 states have call successors, (3310), 1271 states have call predecessors, (3310), 1704 states have return successors, (5138), 3390 states have call predecessors, (5138), 3299 states have call successors, (5138) [2023-04-01 05:36:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 26982 transitions. [2023-04-01 05:36:13,334 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 26982 transitions. Word has length 145 [2023-04-01 05:36:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:13,335 INFO L495 AbstractCegarLoop]: Abstraction has 17354 states and 26982 transitions. [2023-04-01 05:36:13,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 05:36:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 26982 transitions. [2023-04-01 05:36:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 05:36:13,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:13,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 05:36:13,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 05:36:13,338 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:13,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:13,338 INFO L85 PathProgramCache]: Analyzing trace with hash -123930918, now seen corresponding path program 1 times [2023-04-01 05:36:13,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:13,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920835268] [2023-04-01 05:36:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:13,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:36:13,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:13,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920835268] [2023-04-01 05:36:13,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920835268] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:13,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:13,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:36:13,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837337700] [2023-04-01 05:36:13,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:13,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:36:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:36:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:36:13,642 INFO L87 Difference]: Start difference. First operand 17354 states and 26982 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 05:36:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:16,894 INFO L93 Difference]: Finished difference Result 52333 states and 84209 transitions. [2023-04-01 05:36:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:36:16,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 147 [2023-04-01 05:36:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:17,070 INFO L225 Difference]: With dead ends: 52333 [2023-04-01 05:36:17,071 INFO L226 Difference]: Without dead ends: 35033 [2023-04-01 05:36:17,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:36:17,145 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1210 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:17,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 517 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 05:36:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35033 states. [2023-04-01 05:36:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35033 to 34473. [2023-04-01 05:36:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34473 states, 24562 states have (on average 1.5005292728605162) internal successors, (36856), 25789 states have internal predecessors, (36856), 6430 states have call successors, (6430), 2503 states have call predecessors, (6430), 3480 states have return successors, (11426), 6642 states have call predecessors, (11426), 6415 states have call successors, (11426) [2023-04-01 05:36:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34473 states to 34473 states and 54712 transitions. [2023-04-01 05:36:20,153 INFO L78 Accepts]: Start accepts. Automaton has 34473 states and 54712 transitions. Word has length 147 [2023-04-01 05:36:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:20,154 INFO L495 AbstractCegarLoop]: Abstraction has 34473 states and 54712 transitions. [2023-04-01 05:36:20,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 05:36:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 34473 states and 54712 transitions. [2023-04-01 05:36:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 05:36:20,156 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:20,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 05:36:20,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 05:36:20,157 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:20,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash 125365595, now seen corresponding path program 1 times [2023-04-01 05:36:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:20,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613200207] [2023-04-01 05:36:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:20,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:36:20,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613200207] [2023-04-01 05:36:20,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613200207] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:20,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:20,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:36:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550346385] [2023-04-01 05:36:20,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:20,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:36:20,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:36:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:36:20,377 INFO L87 Difference]: Start difference. First operand 34473 states and 54712 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 05:36:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:26,294 INFO L93 Difference]: Finished difference Result 104148 states and 174582 transitions. [2023-04-01 05:36:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:36:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 147 [2023-04-01 05:36:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:26,931 INFO L225 Difference]: With dead ends: 104148 [2023-04-01 05:36:26,931 INFO L226 Difference]: Without dead ends: 69741 [2023-04-01 05:36:27,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:36:27,046 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1207 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:27,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 522 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 05:36:27,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69741 states. [2023-04-01 05:36:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69741 to 68840. [2023-04-01 05:36:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68840 states, 49057 states have (on average 1.497971747151273) internal successors, (73486), 51572 states have internal predecessors, (73486), 12638 states have call successors, (12638), 4967 states have call predecessors, (12638), 7144 states have return successors, (26910), 13194 states have call predecessors, (26910), 12615 states have call successors, (26910) [2023-04-01 05:36:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68840 states to 68840 states and 113034 transitions. [2023-04-01 05:36:32,892 INFO L78 Accepts]: Start accepts. Automaton has 68840 states and 113034 transitions. Word has length 147 [2023-04-01 05:36:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:32,893 INFO L495 AbstractCegarLoop]: Abstraction has 68840 states and 113034 transitions. [2023-04-01 05:36:32,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 05:36:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 68840 states and 113034 transitions. [2023-04-01 05:36:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 05:36:32,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:32,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 05:36:32,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 05:36:32,896 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:32,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:32,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1111286172, now seen corresponding path program 1 times [2023-04-01 05:36:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:32,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142158432] [2023-04-01 05:36:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:36:33,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142158432] [2023-04-01 05:36:33,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142158432] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:33,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:33,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:36:33,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483773925] [2023-04-01 05:36:33,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:33,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:36:33,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:36:33,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:36:33,121 INFO L87 Difference]: Start difference. First operand 68840 states and 113034 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29)