/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 EqDomain -i ../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:39:57,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:39:57,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:39:57,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:39:57,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:39:57,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:39:57,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:39:57,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:39:57,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:39:57,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:39:57,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:39:57,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:39:57,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:39:57,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:39:57,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:39:57,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:39:57,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:39:57,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:39:57,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:39:57,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:39:57,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:39:57,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:39:57,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:39:57,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:39:57,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:39:57,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:39:57,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:39:57,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:39:57,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:39:57,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:39:57,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:39:57,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:39:57,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:39:57,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:39:57,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:39:57,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:39:57,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:39:57,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:39:57,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:39:57,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:39:57,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:39:57,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:39:57,604 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:39:57,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:39:57,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:39:57,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:39:57,606 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:39:57,606 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:39:57,607 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:39:57,607 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:39:57,607 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:39:57,607 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:39:57,607 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:39:57,607 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:39:57,608 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:39:57,608 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:39:57,608 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:39:57,608 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:39:57,608 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:39:57,608 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:39:57,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:39:57,609 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:39:57,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:39:57,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:39:57,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:39:57,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:39:57,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:39:57,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:39:57,610 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:39:57,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:39:57,610 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:39:57,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:39:57,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:39:57,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:39:57,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:39:57,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:39:57,610 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:39:57,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:39:57,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:39:57,611 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:39:57,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:39:57,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:39:57,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:39:57,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:39:57,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:39:57,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:39:57,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:39:57,799 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:39:57,800 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:39:57,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2023-04-01 11:39:58,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:39:59,126 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:39:59,127 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2023-04-01 11:39:59,148 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3173ad79/92a6638d7b52492cb2f798bb76b0a0f7/FLAG33dbf09cf [2023-04-01 11:39:59,161 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3173ad79/92a6638d7b52492cb2f798bb76b0a0f7 [2023-04-01 11:39:59,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:39:59,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:39:59,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:39:59,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:39:59,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:39:59,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b82cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59, skipping insertion in model container [2023-04-01 11:39:59,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:39:59,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:39:59,422 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_product31.cil.c[11232,11245] [2023-04-01 11:39:59,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:39:59,659 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:39:59,686 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_product31.cil.c[11232,11245] [2023-04-01 11:39:59,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:39:59,743 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:39:59,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59 WrapperNode [2023-04-01 11:39:59,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:39:59,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:39:59,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:39:59,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:39:59,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,869 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:39:59,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:39:59,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:39:59,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:39:59,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (1/1) ... [2023-04-01 11:39:59,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:39:59,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:39:59,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:39:59,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:39:59,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 11:39:59,947 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 11:39:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 11:39:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-01 11:39:59,950 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-01 11:39:59,950 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 11:39:59,950 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 11:39:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 11:39:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 11:39:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 11:39:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 11:39:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2023-04-01 11:39:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2023-04-01 11:39:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2023-04-01 11:39:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2023-04-01 11:39:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 11:39:59,952 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 11:39:59,952 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 11:39:59,952 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 11:39:59,952 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 11:39:59,952 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 11:39:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 11:39:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 11:39:59,955 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 11:39:59,955 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 11:39:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:39:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:39:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:39:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:39:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 11:39:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 11:39:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 11:39:59,958 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 11:39:59,958 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 11:39:59,958 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 11:39:59,958 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 11:39:59,958 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 11:39:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 11:39:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 11:39:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 11:39:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 11:39:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 11:39:59,961 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 11:39:59,962 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 11:39:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 11:39:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 11:39:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 11:39:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:39:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 11:39:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 11:39:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:39:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:39:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:40:00,208 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:40:00,210 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:40:01,233 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:40:01,862 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:40:01,863 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 11:40:01,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:40:01 BoogieIcfgContainer [2023-04-01 11:40:01,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:40:01,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:40:01,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:40:01,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:40:01,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:39:59" (1/3) ... [2023-04-01 11:40:01,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d3f359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:40:01, skipping insertion in model container [2023-04-01 11:40:01,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:59" (2/3) ... [2023-04-01 11:40:01,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d3f359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:40:01, skipping insertion in model container [2023-04-01 11:40:01,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:40:01" (3/3) ... [2023-04-01 11:40:01,873 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2023-04-01 11:40:01,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:40:01,887 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:40:01,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:40:01,950 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;@533b44f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:40:01,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:40:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 602 states, 351 states have (on average 1.4729344729344729) internal successors, (517), 378 states have internal predecessors, (517), 183 states have call successors, (183), 55 states have call predecessors, (183), 55 states have return successors, (183), 174 states have call predecessors, (183), 183 states have call successors, (183) [2023-04-01 11:40:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 11:40:01,988 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:01,989 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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] [2023-04-01 11:40:01,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:01,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash -429114000, now seen corresponding path program 1 times [2023-04-01 11:40:01,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:01,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498959516] [2023-04-01 11:40:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:02,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:40:02,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:02,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498959516] [2023-04-01 11:40:02,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498959516] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:02,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:02,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:40:02,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667895710] [2023-04-01 11:40:02,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:40:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:02,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:40:02,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:40:02,522 INFO L87 Difference]: Start difference. First operand has 602 states, 351 states have (on average 1.4729344729344729) internal successors, (517), 378 states have internal predecessors, (517), 183 states have call successors, (183), 55 states have call predecessors, (183), 55 states have return successors, (183), 174 states have call predecessors, (183), 183 states have call successors, (183) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-04-01 11:40:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:02,665 INFO L93 Difference]: Finished difference Result 511 states and 751 transitions. [2023-04-01 11:40:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:40:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 135 [2023-04-01 11:40:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:02,684 INFO L225 Difference]: With dead ends: 511 [2023-04-01 11:40:02,685 INFO L226 Difference]: Without dead ends: 477 [2023-04-01 11:40:02,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:40:02,690 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:02,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 669 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:40:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-04-01 11:40:02,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2023-04-01 11:40:02,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 298 states have (on average 1.5033557046979866) internal successors, (448), 317 states have internal predecessors, (448), 130 states have call successors, (130), 52 states have call predecessors, (130), 48 states have return successors, (122), 119 states have call predecessors, (122), 122 states have call successors, (122) [2023-04-01 11:40:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 700 transitions. [2023-04-01 11:40:02,769 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 700 transitions. Word has length 135 [2023-04-01 11:40:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:02,772 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 700 transitions. [2023-04-01 11:40:02,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-04-01 11:40:02,773 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 700 transitions. [2023-04-01 11:40:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 11:40:02,777 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:02,777 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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] [2023-04-01 11:40:02,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:40:02,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:02,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1346058678, now seen corresponding path program 1 times [2023-04-01 11:40:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:02,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323786666] [2023-04-01 11:40:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:02,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:40:03,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:03,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323786666] [2023-04-01 11:40:03,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323786666] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:03,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:03,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:40:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044604981] [2023-04-01 11:40:03,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:03,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:40:03,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:03,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:40:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:40:03,498 INFO L87 Difference]: Start difference. First operand 477 states and 700 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-01 11:40:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:05,561 INFO L93 Difference]: Finished difference Result 1336 states and 2011 transitions. [2023-04-01 11:40:05,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:40:05,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) Word has length 136 [2023-04-01 11:40:05,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:05,567 INFO L225 Difference]: With dead ends: 1336 [2023-04-01 11:40:05,567 INFO L226 Difference]: Without dead ends: 912 [2023-04-01 11:40:05,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:40:05,571 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1295 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 3525 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 4016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 3525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:05,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1391 Valid, 504 Invalid, 4016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 3525 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 11:40:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-04-01 11:40:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 887. [2023-04-01 11:40:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 568 states have (on average 1.5211267605633803) internal successors, (864), 601 states have internal predecessors, (864), 234 states have call successors, (234), 87 states have call predecessors, (234), 84 states have return successors, (232), 222 states have call predecessors, (232), 226 states have call successors, (232) [2023-04-01 11:40:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1330 transitions. [2023-04-01 11:40:05,617 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1330 transitions. Word has length 136 [2023-04-01 11:40:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:05,617 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1330 transitions. [2023-04-01 11:40:05,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-01 11:40:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1330 transitions. [2023-04-01 11:40:05,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-01 11:40:05,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:05,620 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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] [2023-04-01 11:40:05,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:40:05,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:05,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1864466842, now seen corresponding path program 1 times [2023-04-01 11:40:05,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:05,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263529171] [2023-04-01 11:40:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:05,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:40:05,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:05,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263529171] [2023-04-01 11:40:05,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263529171] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:05,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:05,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:40:05,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107843927] [2023-04-01 11:40:05,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:05,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:40:05,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:40:05,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:40:05,902 INFO L87 Difference]: Start difference. First operand 887 states and 1330 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:40:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:06,360 INFO L93 Difference]: Finished difference Result 926 states and 1386 transitions. [2023-04-01 11:40:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:40:06,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) Word has length 140 [2023-04-01 11:40:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:06,366 INFO L225 Difference]: With dead ends: 926 [2023-04-01 11:40:06,366 INFO L226 Difference]: Without dead ends: 909 [2023-04-01 11:40:06,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:40:06,367 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 708 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:06,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 2126 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:40:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2023-04-01 11:40:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 891. [2023-04-01 11:40:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 572 states have (on average 1.5174825174825175) internal successors, (868), 605 states have internal predecessors, (868), 234 states have call successors, (234), 87 states have call predecessors, (234), 84 states have return successors, (232), 222 states have call predecessors, (232), 226 states have call successors, (232) [2023-04-01 11:40:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1334 transitions. [2023-04-01 11:40:06,418 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1334 transitions. Word has length 140 [2023-04-01 11:40:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:06,419 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1334 transitions. [2023-04-01 11:40:06,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:40:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1334 transitions. [2023-04-01 11:40:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 11:40:06,423 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:06,424 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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] [2023-04-01 11:40:06,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:40:06,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:06,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash -23054261, now seen corresponding path program 1 times [2023-04-01 11:40:06,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:06,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446364706] [2023-04-01 11:40:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:06,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:40:06,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:06,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446364706] [2023-04-01 11:40:06,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446364706] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:06,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:06,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:40:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639984054] [2023-04-01 11:40:06,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:06,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:40:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:40:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:40:06,773 INFO L87 Difference]: Start difference. First operand 891 states and 1334 transitions. Second operand has 8 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 1 states have call successors, (29) [2023-04-01 11:40:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:06,937 INFO L93 Difference]: Finished difference Result 912 states and 1360 transitions. [2023-04-01 11:40:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:40:06,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 1 states have call successors, (29) Word has length 145 [2023-04-01 11:40:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:06,942 INFO L225 Difference]: With dead ends: 912 [2023-04-01 11:40:06,942 INFO L226 Difference]: Without dead ends: 895 [2023-04-01 11:40:06,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:40:06,943 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 10 mSDsluCounter, 3935 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4594 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:06,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4594 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:40:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-04-01 11:40:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 891. [2023-04-01 11:40:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 572 states have (on average 1.513986013986014) internal successors, (866), 605 states have internal predecessors, (866), 234 states have call successors, (234), 87 states have call predecessors, (234), 84 states have return successors, (232), 222 states have call predecessors, (232), 226 states have call successors, (232) [2023-04-01 11:40:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1332 transitions. [2023-04-01 11:40:06,974 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1332 transitions. Word has length 145 [2023-04-01 11:40:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:06,975 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1332 transitions. [2023-04-01 11:40:06,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 1 states have call successors, (29) [2023-04-01 11:40:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1332 transitions. [2023-04-01 11:40:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 11:40:06,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:06,977 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-01 11:40:06,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:40:06,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:06,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1693358747, now seen corresponding path program 1 times [2023-04-01 11:40:06,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:06,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516801101] [2023-04-01 11:40:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 11:40:11,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:11,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516801101] [2023-04-01 11:40:11,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516801101] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:40:11,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998783244] [2023-04-01 11:40:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:11,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:40:11,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:40:11,474 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) [2023-04-01 11:40:11,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:40:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:11,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 123 conjunts are in the unsatisfiable core [2023-04-01 11:40:11,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:40:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 11:40:12,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:40:12,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998783244] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:12,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:40:12,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [32] total 48 [2023-04-01 11:40:12,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638629078] [2023-04-01 11:40:12,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:12,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 11:40:12,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:12,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 11:40:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2120, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 11:40:12,971 INFO L87 Difference]: Start difference. First operand 891 states and 1332 transitions. Second operand has 18 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 14 states have internal predecessors, (74), 8 states have call successors, (36), 4 states have call predecessors, (36), 9 states have return successors, (32), 9 states have call predecessors, (32), 7 states have call successors, (32) [2023-04-01 11:40:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:16,905 INFO L93 Difference]: Finished difference Result 1728 states and 2611 transitions. [2023-04-01 11:40:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 11:40:16,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 14 states have internal predecessors, (74), 8 states have call successors, (36), 4 states have call predecessors, (36), 9 states have return successors, (32), 9 states have call predecessors, (32), 7 states have call successors, (32) Word has length 160 [2023-04-01 11:40:16,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:16,910 INFO L225 Difference]: With dead ends: 1728 [2023-04-01 11:40:16,910 INFO L226 Difference]: Without dead ends: 890 [2023-04-01 11:40:16,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=229, Invalid=3677, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 11:40:16,916 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 857 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 8674 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 9161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 8674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:16,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 1650 Invalid, 9161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 8674 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 11:40:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2023-04-01 11:40:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 884. [2023-04-01 11:40:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 568 states have (on average 1.5088028169014085) internal successors, (857), 600 states have internal predecessors, (857), 231 states have call successors, (231), 87 states have call predecessors, (231), 84 states have return successors, (230), 220 states have call predecessors, (230), 224 states have call successors, (230) [2023-04-01 11:40:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1318 transitions. [2023-04-01 11:40:16,958 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1318 transitions. Word has length 160 [2023-04-01 11:40:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:16,960 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1318 transitions. [2023-04-01 11:40:16,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 14 states have internal predecessors, (74), 8 states have call successors, (36), 4 states have call predecessors, (36), 9 states have return successors, (32), 9 states have call predecessors, (32), 7 states have call successors, (32) [2023-04-01 11:40:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1318 transitions. [2023-04-01 11:40:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 11:40:16,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:16,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-01 11:40:16,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:40:17,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:40:17,172 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:17,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:17,173 INFO L85 PathProgramCache]: Analyzing trace with hash 954214940, now seen corresponding path program 1 times [2023-04-01 11:40:17,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:17,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263925875] [2023-04-01 11:40:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:17,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:40:18,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:18,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263925875] [2023-04-01 11:40:18,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263925875] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:40:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031132783] [2023-04-01 11:40:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:40:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:40:18,710 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) [2023-04-01 11:40:18,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:40:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:19,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 129 conjunts are in the unsatisfiable core [2023-04-01 11:40:19,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:40:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 11:40:20,282 INFO L327 TraceCheckSpWp]: Computing backward predicates...