/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_spec1_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:41:57,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:41:57,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:41:57,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:41:57,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:41:57,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:41:57,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:41:57,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:41:57,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:41:57,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:41:57,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:41:57,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:41:57,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:41:57,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:41:57,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:41:57,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:41:57,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:41:57,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:41:57,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:41:57,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:41:57,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:41:57,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:41:57,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:41:57,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:41:57,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:41:57,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:41:57,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:41:57,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:41:57,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:41:57,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:41:57,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:41:57,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:41:57,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:41:57,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:41:57,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:41:57,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:41:57,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:41:57,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:41:57,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:41:57,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:41:57,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:41:57,157 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 [2023-04-02 23:41:57,170 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:41:57,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:41:57,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:41:57,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:41:57,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:41:57,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:41:57,171 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:41:57,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:41:57,172 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:41:57,172 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:41:57,172 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:41:57,172 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:41:57,172 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:41:57,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:41:57,172 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:41:57,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:41:57,173 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:41:57,173 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:41:57,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:41:57,173 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:41:57,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:41:57,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:41:57,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:41:57,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:41:57,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:41:57,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:41:57,174 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:41:57,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:41:57,174 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:41:57,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:41:57,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:41:57,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:41:57,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:41:57,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:41:57,175 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:41:57,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:41:57,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:41:57,175 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:41:57,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:41:57,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:41:57,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:41:57,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:41:57,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:41:57,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:41:57,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:41:57,358 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:41:57,358 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:41:57,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2023-04-02 23:41:58,209 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:41:58,547 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:41:58,547 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2023-04-02 23:41:58,567 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a702bd74c/69c0696135274908ad2e873c29aaa1b8/FLAG80b4a0acc [2023-04-02 23:41:58,593 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a702bd74c/69c0696135274908ad2e873c29aaa1b8 [2023-04-02 23:41:58,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:41:58,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:41:58,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:41:58,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:41:58,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:41:58,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:41:58" (1/1) ... [2023-04-02 23:41:58,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87227f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:58, skipping insertion in model container [2023-04-02 23:41:58,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:41:58" (1/1) ... [2023-04-02 23:41:58,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:41:58,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:41:58,767 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_spec1_product18.cil.c[1545,1558] [2023-04-02 23:41:59,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:41:59,074 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:41:59,083 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_spec1_product18.cil.c[1545,1558] [2023-04-02 23:41:59,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:41:59,159 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:41:59,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59 WrapperNode [2023-04-02 23:41:59,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:41:59,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:41:59,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:41:59,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:41:59,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (1/1) ... [2023-04-02 23:41:59,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (1/1) ... [2023-04-02 23:41:59,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (1/1) ... [2023-04-02 23:41:59,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (1/1) ... [2023-04-02 23:41:59,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (1/1) ... [2023-04-02 23:41:59,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (1/1) ... [2023-04-02 23:41:59,268 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (1/1) ... [2023-04-02 23:41:59,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (1/1) ... [2023-04-02 23:41:59,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:41:59,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:41:59,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:41:59,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:41:59,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (1/1) ... [2023-04-02 23:41:59,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:41:59,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:41:59,322 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) [2023-04-02 23:41:59,343 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 [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:41:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:41:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:41:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:41:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:41:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:41:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:41:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:41:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:41:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:41:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:41:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:41:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:41:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:41:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:41:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:41:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2023-04-02 23:41:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:41:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__weight [2023-04-02 23:41:59,381 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:41:59,381 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:41:59,381 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:41:59,381 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:41:59,381 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:41:59,381 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:41:59,381 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:41:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:41:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:41:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:41:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:41:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:41:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:41:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:41:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:41:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:41:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:41:59,385 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:41:59,385 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:41:59,385 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:41:59,385 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:41:59,385 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:41:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:41:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:41:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:41:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:41:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:41:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:41:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:41:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:41:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:41:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2023-04-02 23:41:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2023-04-02 23:41:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2023-04-02 23:41:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:41:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:41:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:41:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:41:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:41:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:41:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:41:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:41:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:41:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:41:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:41:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:41:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:41:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:41:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2023-04-02 23:41:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__weight [2023-04-02 23:41:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:41:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:41:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:41:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:41:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:41:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:41:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:41:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:41:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:41:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:41:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:41:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:41:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:41:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:41:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:41:59,635 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:41:59,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:42:00,530 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:42:01,157 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:42:01,157 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:42:01,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:42:01 BoogieIcfgContainer [2023-04-02 23:42:01,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:42:01,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:42:01,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:42:01,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:42:01,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:41:58" (1/3) ... [2023-04-02 23:42:01,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567c99b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:42:01, skipping insertion in model container [2023-04-02 23:42:01,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:41:59" (2/3) ... [2023-04-02 23:42:01,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567c99b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:42:01, skipping insertion in model container [2023-04-02 23:42:01,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:42:01" (3/3) ... [2023-04-02 23:42:01,165 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2023-04-02 23:42:01,177 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:42:01,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:42:01,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:42:01,231 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;@7599995c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:42:01,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:42:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 558 states, 325 states have (on average 1.4984615384615385) internal successors, (487), 354 states have internal predecessors, (487), 171 states have call successors, (171), 49 states have call predecessors, (171), 49 states have return successors, (171), 161 states have call predecessors, (171), 171 states have call successors, (171) [2023-04-02 23:42:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-02 23:42:01,246 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:01,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:01,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:01,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1721919034, now seen corresponding path program 1 times [2023-04-02 23:42:01,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:01,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076193944] [2023-04-02 23:42:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:01,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:42:02,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:02,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076193944] [2023-04-02 23:42:02,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076193944] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:02,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:02,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:42:02,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732311205] [2023-04-02 23:42:02,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:02,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:42:02,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:42:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:42:02,291 INFO L87 Difference]: Start difference. First operand has 558 states, 325 states have (on average 1.4984615384615385) internal successors, (487), 354 states have internal predecessors, (487), 171 states have call successors, (171), 49 states have call predecessors, (171), 49 states have return successors, (171), 161 states have call predecessors, (171), 171 states have call successors, (171) Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 23:42:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:03,925 INFO L93 Difference]: Finished difference Result 1309 states and 2045 transitions. [2023-04-02 23:42:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:42:03,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 97 [2023-04-02 23:42:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:03,951 INFO L225 Difference]: With dead ends: 1309 [2023-04-02 23:42:03,951 INFO L226 Difference]: Without dead ends: 910 [2023-04-02 23:42:03,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:42:03,962 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 2068 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 922 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2141 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:03,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2141 Valid, 469 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [922 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 23:42:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-04-02 23:42:04,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 821. [2023-04-02 23:42:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 546 states have (on average 1.5787545787545787) internal successors, (862), 576 states have internal predecessors, (862), 206 states have call successors, (206), 69 states have call predecessors, (206), 68 states have return successors, (208), 185 states have call predecessors, (208), 198 states have call successors, (208) [2023-04-02 23:42:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1276 transitions. [2023-04-02 23:42:04,058 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1276 transitions. Word has length 97 [2023-04-02 23:42:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:04,058 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1276 transitions. [2023-04-02 23:42:04,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 23:42:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1276 transitions. [2023-04-02 23:42:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-02 23:42:04,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:04,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:04,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:42:04,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:04,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash -878789030, now seen corresponding path program 1 times [2023-04-02 23:42:04,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:04,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904829938] [2023-04-02 23:42:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:04,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:42:04,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:04,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904829938] [2023-04-02 23:42:04,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904829938] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:04,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:04,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-02 23:42:04,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108055699] [2023-04-02 23:42:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:04,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 23:42:04,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:04,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 23:42:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:42:04,719 INFO L87 Difference]: Start difference. First operand 821 states and 1276 transitions. Second operand has 12 states, 9 states have (on average 6.777777777777778) internal successors, (61), 10 states have internal predecessors, (61), 6 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-02 23:42:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:07,834 INFO L93 Difference]: Finished difference Result 2435 states and 3822 transitions. [2023-04-02 23:42:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 23:42:07,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.777777777777778) internal successors, (61), 10 states have internal predecessors, (61), 6 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) Word has length 125 [2023-04-02 23:42:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:07,842 INFO L225 Difference]: With dead ends: 2435 [2023-04-02 23:42:07,842 INFO L226 Difference]: Without dead ends: 1667 [2023-04-02 23:42:07,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-04-02 23:42:07,845 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1153 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 8558 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 9084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 8558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:07,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1197 Valid, 1390 Invalid, 9084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 8558 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 23:42:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2023-04-02 23:42:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1608. [2023-04-02 23:42:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1086 states have (on average 1.567219152854512) internal successors, (1702), 1133 states have internal predecessors, (1702), 386 states have call successors, (386), 123 states have call predecessors, (386), 135 states have return successors, (418), 371 states have call predecessors, (418), 378 states have call successors, (418) [2023-04-02 23:42:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2506 transitions. [2023-04-02 23:42:07,922 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2506 transitions. Word has length 125 [2023-04-02 23:42:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:07,923 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2506 transitions. [2023-04-02 23:42:07,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.777777777777778) internal successors, (61), 10 states have internal predecessors, (61), 6 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-02 23:42:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2506 transitions. [2023-04-02 23:42:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-02 23:42:07,925 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:07,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:42:07,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:07,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash -215632885, now seen corresponding path program 1 times [2023-04-02 23:42:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274208163] [2023-04-02 23:42:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:42:08,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:08,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274208163] [2023-04-02 23:42:08,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274208163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:08,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:08,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:42:08,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344194934] [2023-04-02 23:42:08,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:08,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:42:08,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:08,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:42:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:42:08,254 INFO L87 Difference]: Start difference. First operand 1608 states and 2506 transitions. Second operand has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:42:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:08,447 INFO L93 Difference]: Finished difference Result 3443 states and 5455 transitions. [2023-04-02 23:42:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:42:08,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 126 [2023-04-02 23:42:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:08,461 INFO L225 Difference]: With dead ends: 3443 [2023-04-02 23:42:08,462 INFO L226 Difference]: Without dead ends: 1890 [2023-04-02 23:42:08,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:42:08,467 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 33 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4269 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:08,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4269 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:42:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2023-04-02 23:42:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1632. [2023-04-02 23:42:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1104 states have (on average 1.5579710144927537) internal successors, (1720), 1151 states have internal predecessors, (1720), 386 states have call successors, (386), 123 states have call predecessors, (386), 141 states have return successors, (424), 377 states have call predecessors, (424), 378 states have call successors, (424) [2023-04-02 23:42:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2530 transitions. [2023-04-02 23:42:08,548 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2530 transitions. Word has length 126 [2023-04-02 23:42:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:08,549 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 2530 transitions. [2023-04-02 23:42:08,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:42:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2530 transitions. [2023-04-02 23:42:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-02 23:42:08,554 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:08,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:08,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:42:08,555 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:08,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash -17132644, now seen corresponding path program 1 times [2023-04-02 23:42:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:08,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529405344] [2023-04-02 23:42:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:42:09,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529405344] [2023-04-02 23:42:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529405344] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:09,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:09,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:42:09,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701503914] [2023-04-02 23:42:09,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:09,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:42:09,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:42:09,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:42:09,014 INFO L87 Difference]: Start difference. First operand 1632 states and 2530 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 5 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) [2023-04-02 23:42:11,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:11,161 INFO L93 Difference]: Finished difference Result 4451 states and 6997 transitions. [2023-04-02 23:42:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 23:42:11,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 5 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) Word has length 130 [2023-04-02 23:42:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:11,175 INFO L225 Difference]: With dead ends: 4451 [2023-04-02 23:42:11,175 INFO L226 Difference]: Without dead ends: 2874 [2023-04-02 23:42:11,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:42:11,183 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 1701 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 3373 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 3894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 3373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:11,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1773 Valid, 655 Invalid, 3894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 3373 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 23:42:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2023-04-02 23:42:11,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2809. [2023-04-02 23:42:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 1958 states have (on average 1.5934627170582227) internal successors, (3120), 2036 states have internal predecessors, (3120), 623 states have call successors, (623), 194 states have call predecessors, (623), 227 states have return successors, (693), 608 states have call predecessors, (693), 615 states have call successors, (693) [2023-04-02 23:42:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 4436 transitions. [2023-04-02 23:42:11,328 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 4436 transitions. Word has length 130 [2023-04-02 23:42:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:11,329 INFO L495 AbstractCegarLoop]: Abstraction has 2809 states and 4436 transitions. [2023-04-02 23:42:11,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 5 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) [2023-04-02 23:42:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 4436 transitions. [2023-04-02 23:42:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-02 23:42:11,331 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:11,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:11,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:42:11,331 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:11,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:11,332 INFO L85 PathProgramCache]: Analyzing trace with hash -525099894, now seen corresponding path program 1 times [2023-04-02 23:42:11,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:11,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437784725] [2023-04-02 23:42:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:11,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:42:11,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:11,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437784725] [2023-04-02 23:42:11,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437784725] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:11,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:11,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:42:11,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220368177] [2023-04-02 23:42:11,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:11,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:42:11,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:11,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:42:11,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:42:11,516 INFO L87 Difference]: Start difference. First operand 2809 states and 4436 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:42:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:11,731 INFO L93 Difference]: Finished difference Result 4888 states and 7752 transitions. [2023-04-02 23:42:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:42:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) Word has length 134 [2023-04-02 23:42:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:11,746 INFO L225 Difference]: With dead ends: 4888 [2023-04-02 23:42:11,746 INFO L226 Difference]: Without dead ends: 2873 [2023-04-02 23:42:11,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:42:11,755 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 7 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:11,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2385 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:42:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2023-04-02 23:42:11,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2849. [2023-04-02 23:42:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 1988 states have (on average 1.5845070422535212) internal successors, (3150), 2066 states have internal predecessors, (3150), 623 states have call successors, (623), 194 states have call predecessors, (623), 237 states have return successors, (713), 618 states have call predecessors, (713), 615 states have call successors, (713) [2023-04-02 23:42:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4486 transitions. [2023-04-02 23:42:11,884 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4486 transitions. Word has length 134 [2023-04-02 23:42:11,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:11,886 INFO L495 AbstractCegarLoop]: Abstraction has 2849 states and 4486 transitions. [2023-04-02 23:42:11,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:42:11,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4486 transitions. [2023-04-02 23:42:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 23:42:11,889 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:11,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:11,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:42:11,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:11,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash -940344094, now seen corresponding path program 1 times [2023-04-02 23:42:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:11,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598396605] [2023-04-02 23:42:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:11,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:42:12,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598396605] [2023-04-02 23:42:12,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598396605] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:12,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:12,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:42:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034302414] [2023-04-02 23:42:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:12,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:42:12,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:42:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:42:12,331 INFO L87 Difference]: Start difference. First operand 2849 states and 4486 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2023-04-02 23:42:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:14,070 INFO L93 Difference]: Finished difference Result 6771 states and 10683 transitions. [2023-04-02 23:42:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:42:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) Word has length 138 [2023-04-02 23:42:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:14,094 INFO L225 Difference]: With dead ends: 6771 [2023-04-02 23:42:14,094 INFO L226 Difference]: Without dead ends: 4524 [2023-04-02 23:42:14,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:42:14,107 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 2166 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 2732 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 2732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:14,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2329 Valid, 420 Invalid, 3556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 2732 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 23:42:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4524 states. [2023-04-02 23:42:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4524 to 4460. [2023-04-02 23:42:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 3051 states have (on average 1.5362176335627664) internal successors, (4687), 3182 states have internal predecessors, (4687), 1000 states have call successors, (1000), 331 states have call predecessors, (1000), 408 states have return successors, (1184), 996 states have call predecessors, (1184), 992 states have call successors, (1184) [2023-04-02 23:42:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 6871 transitions. [2023-04-02 23:42:14,390 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 6871 transitions. Word has length 138 [2023-04-02 23:42:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:14,390 INFO L495 AbstractCegarLoop]: Abstraction has 4460 states and 6871 transitions. [2023-04-02 23:42:14,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2023-04-02 23:42:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 6871 transitions. [2023-04-02 23:42:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-02 23:42:14,392 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:14,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:14,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:42:14,392 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:14,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:14,393 INFO L85 PathProgramCache]: Analyzing trace with hash 829035385, now seen corresponding path program 1 times [2023-04-02 23:42:14,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:14,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089746918] [2023-04-02 23:42:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:14,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:42:14,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:14,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089746918] [2023-04-02 23:42:14,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089746918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:14,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:14,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:42:14,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346445181] [2023-04-02 23:42:14,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:14,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:42:14,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:14,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:42:14,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:42:14,610 INFO L87 Difference]: Start difference. First operand 4460 states and 6871 transitions. Second operand has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:42:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:15,095 INFO L93 Difference]: Finished difference Result 8858 states and 13957 transitions. [2023-04-02 23:42:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:42:15,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 141 [2023-04-02 23:42:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:15,116 INFO L225 Difference]: With dead ends: 8858 [2023-04-02 23:42:15,116 INFO L226 Difference]: Without dead ends: 4460 [2023-04-02 23:42:15,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:42:15,134 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 211 mSDsluCounter, 2903 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3530 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:15,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3530 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:42:15,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2023-04-02 23:42:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 4460. [2023-04-02 23:42:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 3051 states have (on average 1.4968862667977711) internal successors, (4567), 3182 states have internal predecessors, (4567), 1000 states have call successors, (1000), 331 states have call predecessors, (1000), 408 states have return successors, (1184), 996 states have call predecessors, (1184), 992 states have call successors, (1184) [2023-04-02 23:42:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 6751 transitions. [2023-04-02 23:42:15,376 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 6751 transitions. Word has length 141 [2023-04-02 23:42:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:15,377 INFO L495 AbstractCegarLoop]: Abstraction has 4460 states and 6751 transitions. [2023-04-02 23:42:15,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:42:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 6751 transitions. [2023-04-02 23:42:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-02 23:42:15,379 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:15,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:15,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:42:15,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:15,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash -727363910, now seen corresponding path program 1 times [2023-04-02 23:42:15,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:15,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246844003] [2023-04-02 23:42:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:15,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:42:15,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:15,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246844003] [2023-04-02 23:42:15,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246844003] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:15,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:15,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:42:15,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211185998] [2023-04-02 23:42:15,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:15,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:42:15,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:15,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:42:15,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:42:15,813 INFO L87 Difference]: Start difference. First operand 4460 states and 6751 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 5 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-02 23:42:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:17,749 INFO L93 Difference]: Finished difference Result 8415 states and 12755 transitions. [2023-04-02 23:42:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:42:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 5 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) Word has length 143 [2023-04-02 23:42:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:17,778 INFO L225 Difference]: With dead ends: 8415 [2023-04-02 23:42:17,778 INFO L226 Difference]: Without dead ends: 4671 [2023-04-02 23:42:17,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:42:17,792 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 988 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:17,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 571 Invalid, 3572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 23:42:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2023-04-02 23:42:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 4550. [2023-04-02 23:42:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4550 states, 3111 states have (on average 1.4918032786885247) internal successors, (4641), 3256 states have internal predecessors, (4641), 1002 states have call successors, (1002), 347 states have call predecessors, (1002), 436 states have return successors, (1222), 996 states have call predecessors, (1222), 994 states have call successors, (1222) [2023-04-02 23:42:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4550 states to 4550 states and 6865 transitions. [2023-04-02 23:42:18,059 INFO L78 Accepts]: Start accepts. Automaton has 4550 states and 6865 transitions. Word has length 143 [2023-04-02 23:42:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:18,059 INFO L495 AbstractCegarLoop]: Abstraction has 4550 states and 6865 transitions. [2023-04-02 23:42:18,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 5 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-02 23:42:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4550 states and 6865 transitions. [2023-04-02 23:42:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-02 23:42:18,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:18,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:18,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:42:18,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:18,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1074189219, now seen corresponding path program 1 times [2023-04-02 23:42:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:18,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986356872] [2023-04-02 23:42:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 23:42:18,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:18,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986356872] [2023-04-02 23:42:18,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986356872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:18,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:18,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:42:18,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699865724] [2023-04-02 23:42:18,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:18,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:42:18,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:42:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:42:18,314 INFO L87 Difference]: Start difference. First operand 4550 states and 6865 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:42:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:18,934 INFO L93 Difference]: Finished difference Result 4603 states and 6947 transitions. [2023-04-02 23:42:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:42:18,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) Word has length 150 [2023-04-02 23:42:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:18,951 INFO L225 Difference]: With dead ends: 4603 [2023-04-02 23:42:18,952 INFO L226 Difference]: Without dead ends: 4586 [2023-04-02 23:42:18,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:42:18,956 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 646 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:18,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1914 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:42:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2023-04-02 23:42:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4556. [2023-04-02 23:42:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4556 states, 3117 states have (on average 1.490856592877767) internal successors, (4647), 3262 states have internal predecessors, (4647), 1002 states have call successors, (1002), 347 states have call predecessors, (1002), 436 states have return successors, (1222), 996 states have call predecessors, (1222), 994 states have call successors, (1222) [2023-04-02 23:42:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 6871 transitions. [2023-04-02 23:42:19,217 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 6871 transitions. Word has length 150 [2023-04-02 23:42:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:19,217 INFO L495 AbstractCegarLoop]: Abstraction has 4556 states and 6871 transitions. [2023-04-02 23:42:19,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:42:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 6871 transitions. [2023-04-02 23:42:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-02 23:42:19,220 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:19,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:19,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:42:19,221 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:19,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:19,221 INFO L85 PathProgramCache]: Analyzing trace with hash -544056936, now seen corresponding path program 1 times [2023-04-02 23:42:19,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:19,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614000506] [2023-04-02 23:42:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:19,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:42:19,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:19,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614000506] [2023-04-02 23:42:19,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614000506] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:19,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:19,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:42:19,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817054761] [2023-04-02 23:42:19,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:19,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:42:19,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:42:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:42:19,534 INFO L87 Difference]: Start difference. First operand 4556 states and 6871 transitions. Second operand has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (30), 5 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:42:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:20,268 INFO L93 Difference]: Finished difference Result 4798 states and 7204 transitions. [2023-04-02 23:42:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:42:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (30), 5 states have call predecessors, (30), 2 states have call successors, (30) Word has length 152 [2023-04-02 23:42:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:20,285 INFO L225 Difference]: With dead ends: 4798 [2023-04-02 23:42:20,285 INFO L226 Difference]: Without dead ends: 4781 [2023-04-02 23:42:20,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:42:20,287 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 629 mSDsluCounter, 3438 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 4028 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:20,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 4028 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:42:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2023-04-02 23:42:20,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 4695. [2023-04-02 23:42:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 3206 states have (on average 1.4844042420461634) internal successors, (4759), 3351 states have internal predecessors, (4759), 1032 states have call successors, (1032), 367 states have call predecessors, (1032), 456 states have return successors, (1267), 1026 states have call predecessors, (1267), 1024 states have call successors, (1267) [2023-04-02 23:42:20,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 7058 transitions. [2023-04-02 23:42:20,503 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 7058 transitions. Word has length 152 [2023-04-02 23:42:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:20,504 INFO L495 AbstractCegarLoop]: Abstraction has 4695 states and 7058 transitions. [2023-04-02 23:42:20,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (30), 5 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:42:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 7058 transitions. [2023-04-02 23:42:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-02 23:42:20,506 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:20,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:20,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:42:20,507 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:20,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:20,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1641625720, now seen corresponding path program 1 times [2023-04-02 23:42:20,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:20,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310141308] [2023-04-02 23:42:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:20,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:42:21,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310141308] [2023-04-02 23:42:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310141308] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:21,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:21,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-02 23:42:21,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209944602] [2023-04-02 23:42:21,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:21,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 23:42:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 23:42:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:42:21,421 INFO L87 Difference]: Start difference. First operand 4695 states and 7058 transitions. Second operand has 13 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 6 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (34), 10 states have call predecessors, (34), 5 states have call successors, (34) [2023-04-02 23:42:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:28,923 INFO L93 Difference]: Finished difference Result 15550 states and 24219 transitions. [2023-04-02 23:42:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-04-02 23:42:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 6 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (34), 10 states have call predecessors, (34), 5 states have call successors, (34) Word has length 170 [2023-04-02 23:42:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:28,986 INFO L225 Difference]: With dead ends: 15550 [2023-04-02 23:42:28,986 INFO L226 Difference]: Without dead ends: 10609 [2023-04-02 23:42:29,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=3138, Unknown=0, NotChecked=0, Total=3660 [2023-04-02 23:42:29,006 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 6287 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 13492 mSolverCounterSat, 2839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6335 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 16331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2839 IncrementalHoareTripleChecker+Valid, 13492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:29,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6335 Valid, 1836 Invalid, 16331 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2839 Valid, 13492 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-04-02 23:42:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2023-04-02 23:42:29,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 10160. [2023-04-02 23:42:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 6931 states have (on average 1.5090174577982975) internal successors, (10459), 7293 states have internal predecessors, (10459), 2269 states have call successors, (2269), 765 states have call predecessors, (2269), 959 states have return successors, (2881), 2251 states have call predecessors, (2881), 2261 states have call successors, (2881) [2023-04-02 23:42:29,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 15609 transitions. [2023-04-02 23:42:29,719 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 15609 transitions. Word has length 170 [2023-04-02 23:42:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:29,719 INFO L495 AbstractCegarLoop]: Abstraction has 10160 states and 15609 transitions. [2023-04-02 23:42:29,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 6 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (34), 10 states have call predecessors, (34), 5 states have call successors, (34) [2023-04-02 23:42:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 15609 transitions. [2023-04-02 23:42:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-02 23:42:29,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:29,725 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:29,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 23:42:29,725 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:29,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:29,725 INFO L85 PathProgramCache]: Analyzing trace with hash 547030402, now seen corresponding path program 1 times [2023-04-02 23:42:29,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:29,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397037980] [2023-04-02 23:42:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:29,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:42:30,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:30,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397037980] [2023-04-02 23:42:30,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397037980] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:30,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:42:30,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:42:30,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725213113] [2023-04-02 23:42:30,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:30,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:42:30,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:30,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:42:30,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:42:30,115 INFO L87 Difference]: Start difference. First operand 10160 states and 15609 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (33), 6 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-02 23:42:32,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:32,910 INFO L93 Difference]: Finished difference Result 28098 states and 43912 transitions. [2023-04-02 23:42:32,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:42:32,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (33), 6 states have call predecessors, (33), 3 states have call successors, (33) Word has length 168 [2023-04-02 23:42:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:32,983 INFO L225 Difference]: With dead ends: 28098 [2023-04-02 23:42:32,983 INFO L226 Difference]: Without dead ends: 18583 [2023-04-02 23:42:33,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:42:33,014 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 2008 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2074 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:33,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2074 Valid, 1074 Invalid, 3735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 23:42:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18583 states. [2023-04-02 23:42:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18583 to 17124. [2023-04-02 23:42:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17124 states, 11601 states have (on average 1.501767089044048) internal successors, (17422), 12289 states have internal predecessors, (17422), 3837 states have call successors, (3837), 1341 states have call predecessors, (3837), 1685 states have return successors, (4943), 3832 states have call predecessors, (4943), 3829 states have call successors, (4943) [2023-04-02 23:42:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17124 states to 17124 states and 26202 transitions. [2023-04-02 23:42:34,177 INFO L78 Accepts]: Start accepts. Automaton has 17124 states and 26202 transitions. Word has length 168 [2023-04-02 23:42:34,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:34,177 INFO L495 AbstractCegarLoop]: Abstraction has 17124 states and 26202 transitions. [2023-04-02 23:42:34,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (33), 6 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-02 23:42:34,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17124 states and 26202 transitions. [2023-04-02 23:42:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-02 23:42:34,182 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:34,182 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 23:42:34,183 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:34,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash 906843600, now seen corresponding path program 1 times [2023-04-02 23:42:34,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:34,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385397102] [2023-04-02 23:42:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:34,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:42:36,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:36,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385397102] [2023-04-02 23:42:36,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385397102] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:42:36,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244772413] [2023-04-02 23:42:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:36,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:42:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:42:36,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:42:36,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:42:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:36,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 3223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 23:42:36,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:42:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 23:42:36,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:42:36,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244772413] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:42:36,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:42:36,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [28] total 35 [2023-04-02 23:42:36,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266429370] [2023-04-02 23:42:36,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:42:36,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 23:42:36,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:42:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 23:42:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 23:42:36,797 INFO L87 Difference]: Start difference. First operand 17124 states and 26202 transitions. Second operand has 10 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (34), 5 states have call predecessors, (34), 1 states have call successors, (34) [2023-04-02 23:42:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:42:37,876 INFO L93 Difference]: Finished difference Result 17271 states and 26413 transitions. [2023-04-02 23:42:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 23:42:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (34), 5 states have call predecessors, (34), 1 states have call successors, (34) Word has length 173 [2023-04-02 23:42:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:42:37,932 INFO L225 Difference]: With dead ends: 17271 [2023-04-02 23:42:37,932 INFO L226 Difference]: Without dead ends: 17254 [2023-04-02 23:42:37,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 23:42:37,940 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 10 mSDsluCounter, 4749 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 5346 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:42:37,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 5346 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:42:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2023-04-02 23:42:38,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 17214. [2023-04-02 23:42:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17214 states, 11661 states have (on average 1.4961838607323557) internal successors, (17447), 12349 states have internal predecessors, (17447), 3837 states have call successors, (3837), 1341 states have call predecessors, (3837), 1715 states have return successors, (4993), 3862 states have call predecessors, (4993), 3829 states have call successors, (4993) [2023-04-02 23:42:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17214 states to 17214 states and 26277 transitions. [2023-04-02 23:42:39,039 INFO L78 Accepts]: Start accepts. Automaton has 17214 states and 26277 transitions. Word has length 173 [2023-04-02 23:42:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:42:39,039 INFO L495 AbstractCegarLoop]: Abstraction has 17214 states and 26277 transitions. [2023-04-02 23:42:39,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (34), 5 states have call predecessors, (34), 1 states have call successors, (34) [2023-04-02 23:42:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 17214 states and 26277 transitions. [2023-04-02 23:42:39,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-04-02 23:42:39,045 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:42:39,045 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:42:39,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:42:39,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 23:42:39,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:42:39,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:42:39,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2067181702, now seen corresponding path program 1 times [2023-04-02 23:42:39,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:42:39,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987944356] [2023-04-02 23:42:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:39,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:42:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-04-02 23:42:39,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:42:39,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987944356] [2023-04-02 23:42:39,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987944356] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:42:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642221237] [2023-04-02 23:42:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:42:39,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:42:39,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:42:39,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:42:39,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:42:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:42:40,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 3270 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-02 23:42:40,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:42:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:42:40,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:42:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 23:42:43,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642221237] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:42:43,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300943201] [2023-04-02 23:42:43,493 INFO L159 IcfgInterpreter]: Started Sifa with 165 locations of interest [2023-04-02 23:42:43,494 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:42:43,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:42:43,499 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:42:43,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:42:45,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 187 for LOIs [2023-04-02 23:42:45,890 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 243 for LOIs [2023-04-02 23:42:48,501 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 243 for LOIs [2023-04-02 23:42:52,488 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...