/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_spec13_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:34:47,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:34:47,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:34:47,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:34:47,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:34:47,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:34:47,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:34:47,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:34:47,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:34:47,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:34:47,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:34:47,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:34:47,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:34:47,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:34:47,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:34:47,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:34:47,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:34:47,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:34:47,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:34:47,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:34:47,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:34:47,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:34:47,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:34:47,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:34:47,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:34:47,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:34:47,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:34:47,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:34:47,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:34:47,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:34:47,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:34:47,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:34:47,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:34:47,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:34:47,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:34:47,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:34:47,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:34:47,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:34:47,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:34:47,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:34:47,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:34:47,256 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 23:34:47,292 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:34:47,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:34:47,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:34:47,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:34:47,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:34:47,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:34:47,293 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:34:47,294 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:34:47,294 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:34:47,294 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:34:47,295 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:34:47,295 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:34:47,295 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:34:47,295 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:34:47,295 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:34:47,295 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:34:47,295 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:34:47,295 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:34:47,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:34:47,296 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:34:47,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:34:47,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:34:47,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:34:47,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:34:47,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:34:47,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:34:47,297 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:34:47,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:34:47,298 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:34:47,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:34:47,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:34:47,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:34:47,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:34:47,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:34:47,298 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:34:47,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:34:47,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:34:47,299 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:34:47,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:34:47,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:34:47,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:34:47,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:34:47,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:34:47,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:34:47,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:34:47,557 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:34:47,557 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:34:47,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2023-04-02 23:34:48,700 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:34:49,004 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:34:49,004 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2023-04-02 23:34:49,022 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8981a316a/cba3505460434399b858e951ab8efa47/FLAG77f619270 [2023-04-02 23:34:49,035 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8981a316a/cba3505460434399b858e951ab8efa47 [2023-04-02 23:34:49,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:34:49,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:34:49,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:34:49,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:34:49,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:34:49,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406e0921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49, skipping insertion in model container [2023-04-02 23:34:49,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:34:49,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:34:49,567 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_spec13_product24.cil.c[51490,51503] [2023-04-02 23:34:49,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:34:49,620 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:34:49,695 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_spec13_product24.cil.c[51490,51503] [2023-04-02 23:34:49,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:34:49,756 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:34:49,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49 WrapperNode [2023-04-02 23:34:49,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:34:49,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:34:49,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:34:49,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:34:49,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,902 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:34:49,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:34:49,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:34:49,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:34:49,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (1/1) ... [2023-04-02 23:34:49,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:34:49,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:49,969 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 23:34:49,974 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 23:34:50,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:34:50,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:34:50,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:34:50,011 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:34:50,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:34:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:34:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:34:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:34:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-04-02 23:34:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:34:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:34:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:34:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:34:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-02 23:34:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:34:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:34:50,019 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:34:50,019 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:34:50,019 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-04-02 23:34:50,019 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:34:50,019 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2023-04-02 23:34:50,019 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:34:50,019 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:34:50,020 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:34:50,020 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:34:50,020 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:34:50,021 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:34:50,021 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:34:50,021 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:34:50,021 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:34:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:34:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:34:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:34:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:34:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:34:50,023 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:34:50,023 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:34:50,023 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:34:50,024 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:34:50,024 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:34:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:34:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:34:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:34:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:34:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:34:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2023-04-02 23:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2023-04-02 23:34:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:34:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:34:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:34:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:34:50,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:34:50,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:34:50,028 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:34:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:34:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:34:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:34:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:34:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:34:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:34:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:34:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:34:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:34:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:34:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:34:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:34:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:34:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:34:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:34:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:34:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:34:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:34:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:34:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:34:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:34:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:34:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:34:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:34:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:34:50,034 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:34:50,034 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:34:50,034 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:34:50,034 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:34:50,034 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:34:50,035 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:34:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:34:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:34:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:34:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:34:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:34:50,040 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:34:50,040 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:34:50,040 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:34:50,040 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:34:50,041 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:34:50,041 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:34:50,041 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:34:50,041 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:34:50,041 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:34:50,041 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:34:50,041 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-04-02 23:34:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2023-04-02 23:34:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2023-04-02 23:34:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2023-04-02 23:34:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:34:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:34:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:34:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:34:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:34:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:34:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:34:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:34:50,427 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:34:50,429 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:34:51,839 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:34:52,834 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:34:52,834 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:34:52,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:34:52 BoogieIcfgContainer [2023-04-02 23:34:52,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:34:52,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:34:52,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:34:52,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:34:52,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:34:49" (1/3) ... [2023-04-02 23:34:52,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f31f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:34:52, skipping insertion in model container [2023-04-02 23:34:52,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:49" (2/3) ... [2023-04-02 23:34:52,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f31f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:34:52, skipping insertion in model container [2023-04-02 23:34:52,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:34:52" (3/3) ... [2023-04-02 23:34:52,849 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product24.cil.c [2023-04-02 23:34:52,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:34:52,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:34:52,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:34:52,957 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;@6b35f6f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:34:52,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:34:52,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 631 states, 378 states have (on average 1.492063492063492) internal successors, (564), 404 states have internal predecessors, (564), 185 states have call successors, (185), 56 states have call predecessors, (185), 56 states have return successors, (185), 178 states have call predecessors, (185), 185 states have call successors, (185) [2023-04-02 23:34:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-02 23:34:52,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:52,996 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] [2023-04-02 23:34:52,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:53,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2036703279, now seen corresponding path program 1 times [2023-04-02 23:34:53,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:53,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455758037] [2023-04-02 23:34:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:53,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:54,181 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 23:34:54,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:54,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455758037] [2023-04-02 23:34:54,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455758037] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:54,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:54,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:34:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911061087] [2023-04-02 23:34:54,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:54,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:34:54,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:54,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:34:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:34:54,235 INFO L87 Difference]: Start difference. First operand has 631 states, 378 states have (on average 1.492063492063492) internal successors, (564), 404 states have internal predecessors, (564), 185 states have call successors, (185), 56 states have call predecessors, (185), 56 states have return successors, (185), 178 states have call predecessors, (185), 185 states have call successors, (185) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-04-02 23:34:54,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:54,781 INFO L93 Difference]: Finished difference Result 1479 states and 2260 transitions. [2023-04-02 23:34:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:34:54,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 95 [2023-04-02 23:34:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:54,813 INFO L225 Difference]: With dead ends: 1479 [2023-04-02 23:34:54,813 INFO L226 Difference]: Without dead ends: 977 [2023-04-02 23:34:54,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:34:54,825 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 728 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:54,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1451 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:34:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-04-02 23:34:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 933. [2023-04-02 23:34:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 621 states have (on average 1.5297906602254427) internal successors, (950), 648 states have internal predecessors, (950), 228 states have call successors, (228), 88 states have call predecessors, (228), 83 states have return successors, (230), 209 states have call predecessors, (230), 221 states have call successors, (230) [2023-04-02 23:34:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1408 transitions. [2023-04-02 23:34:54,945 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1408 transitions. Word has length 95 [2023-04-02 23:34:54,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:54,946 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1408 transitions. [2023-04-02 23:34:54,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-04-02 23:34:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1408 transitions. [2023-04-02 23:34:54,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-02 23:34:54,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:54,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2023-04-02 23:34:54,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:34:54,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:54,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:54,958 INFO L85 PathProgramCache]: Analyzing trace with hash -979138660, now seen corresponding path program 1 times [2023-04-02 23:34:54,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:54,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052190135] [2023-04-02 23:34:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:54,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:34:55,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:55,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052190135] [2023-04-02 23:34:55,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052190135] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:55,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:55,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:34:55,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341633942] [2023-04-02 23:34:55,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:55,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:34:55,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:34:55,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:34:55,767 INFO L87 Difference]: Start difference. First operand 933 states and 1408 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-02 23:34:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:58,598 INFO L93 Difference]: Finished difference Result 2797 states and 4286 transitions. [2023-04-02 23:34:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:34:58,599 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), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) Word has length 143 [2023-04-02 23:34:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:58,618 INFO L225 Difference]: With dead ends: 2797 [2023-04-02 23:34:58,619 INFO L226 Difference]: Without dead ends: 1902 [2023-04-02 23:34:58,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:34:58,653 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1395 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 4032 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 4549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 4032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:58,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 656 Invalid, 4549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 4032 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 23:34:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2023-04-02 23:34:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1839. [2023-04-02 23:34:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1235 states have (on average 1.5327935222672064) internal successors, (1893), 1287 states have internal predecessors, (1893), 436 states have call successors, (436), 166 states have call predecessors, (436), 167 states have return successors, (480), 411 states have call predecessors, (480), 427 states have call successors, (480) [2023-04-02 23:34:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2809 transitions. [2023-04-02 23:34:58,783 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2809 transitions. Word has length 143 [2023-04-02 23:34:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:58,785 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 2809 transitions. [2023-04-02 23:34:58,785 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), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-02 23:34:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2809 transitions. [2023-04-02 23:34:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-02 23:34:58,795 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:58,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2023-04-02 23:34:58,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:34:58,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:58,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:58,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1958991114, now seen corresponding path program 1 times [2023-04-02 23:34:58,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:58,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498545997] [2023-04-02 23:34:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:58,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:34:59,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498545997] [2023-04-02 23:34:59,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498545997] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:59,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:59,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 23:34:59,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881355426] [2023-04-02 23:34:59,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:59,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 23:34:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:59,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 23:34:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:34:59,591 INFO L87 Difference]: Start difference. First operand 1839 states and 2809 transitions. Second operand has 10 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (35), 4 states have call predecessors, (35), 4 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-02 23:35:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:00,500 INFO L93 Difference]: Finished difference Result 4039 states and 6187 transitions. [2023-04-02 23:35:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 23:35:00,502 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (35), 4 states have call predecessors, (35), 4 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 146 [2023-04-02 23:35:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:00,516 INFO L225 Difference]: With dead ends: 4039 [2023-04-02 23:35:00,517 INFO L226 Difference]: Without dead ends: 2237 [2023-04-02 23:35:00,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:35:00,527 INFO L413 NwaCegarLoop]: 858 mSDtfsCounter, 531 mSDsluCounter, 5399 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 6257 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:00,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 6257 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 23:35:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2023-04-02 23:35:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2220. [2023-04-02 23:35:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 1485 states have (on average 1.5043771043771044) internal successors, (2234), 1534 states have internal predecessors, (2234), 515 states have call successors, (515), 216 states have call predecessors, (515), 219 states have return successors, (600), 496 states have call predecessors, (600), 504 states have call successors, (600) [2023-04-02 23:35:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3349 transitions. [2023-04-02 23:35:00,638 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3349 transitions. Word has length 146 [2023-04-02 23:35:00,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:00,638 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 3349 transitions. [2023-04-02 23:35:00,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (35), 4 states have call predecessors, (35), 4 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-02 23:35:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3349 transitions. [2023-04-02 23:35:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-02 23:35:00,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:00,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2023-04-02 23:35:00,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:35:00,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:00,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1738827258, now seen corresponding path program 1 times [2023-04-02 23:35:00,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303598181] [2023-04-02 23:35:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:00,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 23:35:00,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:00,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303598181] [2023-04-02 23:35:00,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303598181] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:00,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716388293] [2023-04-02 23:35:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:00,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:00,881 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 23:35:00,886 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 23:35:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:01,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:35:01,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:35:01,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:01,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716388293] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:01,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:01,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-02 23:35:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982444925] [2023-04-02 23:35:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:01,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:35:01,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:01,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:35:01,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:35:01,516 INFO L87 Difference]: Start difference. First operand 2220 states and 3349 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:01,748 INFO L93 Difference]: Finished difference Result 4439 states and 6819 transitions. [2023-04-02 23:35:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:35:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 147 [2023-04-02 23:35:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:01,767 INFO L225 Difference]: With dead ends: 4439 [2023-04-02 23:35:01,768 INFO L226 Difference]: Without dead ends: 2256 [2023-04-02 23:35:01,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:35:01,783 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 85 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:01,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 2034 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:35:01,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2023-04-02 23:35:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2256. [2023-04-02 23:35:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 1515 states have (on average 1.4983498349834983) internal successors, (2270), 1564 states have internal predecessors, (2270), 515 states have call successors, (515), 222 states have call predecessors, (515), 225 states have return successors, (600), 496 states have call predecessors, (600), 504 states have call successors, (600) [2023-04-02 23:35:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 3385 transitions. [2023-04-02 23:35:01,912 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 3385 transitions. Word has length 147 [2023-04-02 23:35:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:01,913 INFO L495 AbstractCegarLoop]: Abstraction has 2256 states and 3385 transitions. [2023-04-02 23:35:01,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 3385 transitions. [2023-04-02 23:35:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 23:35:01,918 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:01,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1] [2023-04-02 23:35:01,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:02,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:02,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:02,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:02,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1549051421, now seen corresponding path program 1 times [2023-04-02 23:35:02,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:02,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240610870] [2023-04-02 23:35:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:02,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 23:35:02,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:02,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240610870] [2023-04-02 23:35:02,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240610870] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:02,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232363564] [2023-04-02 23:35:02,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:02,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:02,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:02,457 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 23:35:02,480 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 23:35:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:03,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:35:03,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 23:35:03,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:03,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232363564] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:03,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:03,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 23:35:03,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926369312] [2023-04-02 23:35:03,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:03,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:35:03,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:35:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:35:03,053 INFO L87 Difference]: Start difference. First operand 2256 states and 3385 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:03,299 INFO L93 Difference]: Finished difference Result 4493 states and 6849 transitions. [2023-04-02 23:35:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:35:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 149 [2023-04-02 23:35:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:03,316 INFO L225 Difference]: With dead ends: 4493 [2023-04-02 23:35:03,316 INFO L226 Difference]: Without dead ends: 2250 [2023-04-02 23:35:03,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 149 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 23:35:03,329 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 91 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2030 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:03,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 2030 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:35:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2023-04-02 23:35:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2250. [2023-04-02 23:35:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 1509 states have (on average 1.4884029158383034) internal successors, (2246), 1558 states have internal predecessors, (2246), 515 states have call successors, (515), 222 states have call predecessors, (515), 225 states have return successors, (600), 496 states have call predecessors, (600), 504 states have call successors, (600) [2023-04-02 23:35:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 3361 transitions. [2023-04-02 23:35:03,450 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 3361 transitions. Word has length 149 [2023-04-02 23:35:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:03,450 INFO L495 AbstractCegarLoop]: Abstraction has 2250 states and 3361 transitions. [2023-04-02 23:35:03,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 3361 transitions. [2023-04-02 23:35:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-02 23:35:03,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:03,455 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:03,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:03,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:03,670 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:03,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash 682154760, now seen corresponding path program 1 times [2023-04-02 23:35:03,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:03,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556751102] [2023-04-02 23:35:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:03,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 23:35:03,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:03,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556751102] [2023-04-02 23:35:03,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556751102] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:03,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552237498] [2023-04-02 23:35:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:03,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:03,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:03,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:03,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:35:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:04,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:35:04,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:35:04,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:04,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552237498] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:04,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:04,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 23:35:04,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641444848] [2023-04-02 23:35:04,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:04,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:35:04,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:35:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:35:04,641 INFO L87 Difference]: Start difference. First operand 2250 states and 3361 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:35:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:05,632 INFO L93 Difference]: Finished difference Result 5706 states and 8884 transitions. [2023-04-02 23:35:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:35:05,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 150 [2023-04-02 23:35:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:05,660 INFO L225 Difference]: With dead ends: 5706 [2023-04-02 23:35:05,660 INFO L226 Difference]: Without dead ends: 3493 [2023-04-02 23:35:05,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:35:05,676 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 731 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 2192 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:05,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 2192 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 23:35:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2023-04-02 23:35:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 3445. [2023-04-02 23:35:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 2314 states have (on average 1.439066551426102) internal successors, (3330), 2388 states have internal predecessors, (3330), 774 states have call successors, (774), 348 states have call predecessors, (774), 356 states have return successors, (1074), 748 states have call predecessors, (1074), 759 states have call successors, (1074) [2023-04-02 23:35:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 5178 transitions. [2023-04-02 23:35:05,876 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 5178 transitions. Word has length 150 [2023-04-02 23:35:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:05,879 INFO L495 AbstractCegarLoop]: Abstraction has 3445 states and 5178 transitions. [2023-04-02 23:35:05,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:35:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 5178 transitions. [2023-04-02 23:35:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-02 23:35:05,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:05,883 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:05,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:06,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:06,094 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:06,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:06,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1284261569, now seen corresponding path program 1 times [2023-04-02 23:35:06,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:06,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925516511] [2023-04-02 23:35:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:06,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 23:35:06,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925516511] [2023-04-02 23:35:06,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925516511] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754608540] [2023-04-02 23:35:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:06,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:06,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:06,606 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:06,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:35:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:07,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 2897 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 23:35:07,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 23:35:07,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:07,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754608540] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:07,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:07,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-04-02 23:35:07,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525391226] [2023-04-02 23:35:07,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:07,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:35:07,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:35:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:35:07,388 INFO L87 Difference]: Start difference. First operand 3445 states and 5178 transitions. Second operand has 7 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 4 states have call predecessors, (35), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-02 23:35:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:08,450 INFO L93 Difference]: Finished difference Result 7815 states and 12160 transitions. [2023-04-02 23:35:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:35:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 4 states have call predecessors, (35), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 151 [2023-04-02 23:35:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:08,480 INFO L225 Difference]: With dead ends: 7815 [2023-04-02 23:35:08,480 INFO L226 Difference]: Without dead ends: 4407 [2023-04-02 23:35:08,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:35:08,498 INFO L413 NwaCegarLoop]: 908 mSDtfsCounter, 1434 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 3068 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:08,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1437 Valid, 3068 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 23:35:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2023-04-02 23:35:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 4363. [2023-04-02 23:35:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 2963 states have (on average 1.423219709753628) internal successors, (4217), 3039 states have internal predecessors, (4217), 911 states have call successors, (911), 464 states have call predecessors, (911), 488 states have return successors, (1707), 899 states have call predecessors, (1707), 888 states have call successors, (1707) [2023-04-02 23:35:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 6835 transitions. [2023-04-02 23:35:08,811 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 6835 transitions. Word has length 151 [2023-04-02 23:35:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:08,812 INFO L495 AbstractCegarLoop]: Abstraction has 4363 states and 6835 transitions. [2023-04-02 23:35:08,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 4 states have call predecessors, (35), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-02 23:35:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 6835 transitions. [2023-04-02 23:35:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-02 23:35:08,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:08,816 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:08,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:09,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:09,027 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:09,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash -118600864, now seen corresponding path program 1 times [2023-04-02 23:35:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:09,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934084215] [2023-04-02 23:35:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:35:09,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:09,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934084215] [2023-04-02 23:35:09,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934084215] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:09,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039363411] [2023-04-02 23:35:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:09,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:09,305 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:09,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:35:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:09,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:35:09,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 23:35:09,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:09,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039363411] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:09,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:09,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 23:35:09,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306805411] [2023-04-02 23:35:09,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:09,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:35:09,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:09,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:35:09,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:35:09,837 INFO L87 Difference]: Start difference. First operand 4363 states and 6835 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:10,231 INFO L93 Difference]: Finished difference Result 8782 states and 14221 transitions. [2023-04-02 23:35:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:35:10,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 151 [2023-04-02 23:35:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:10,261 INFO L225 Difference]: With dead ends: 8782 [2023-04-02 23:35:10,261 INFO L226 Difference]: Without dead ends: 4469 [2023-04-02 23:35:10,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 149 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 23:35:10,287 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 2 mSDsluCounter, 2135 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2853 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:10,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2853 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:35:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2023-04-02 23:35:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4403. [2023-04-02 23:35:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 2993 states have (on average 1.4189776144336785) internal successors, (4247), 3069 states have internal predecessors, (4247), 911 states have call successors, (911), 464 states have call predecessors, (911), 498 states have return successors, (1717), 909 states have call predecessors, (1717), 888 states have call successors, (1717) [2023-04-02 23:35:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 6875 transitions. [2023-04-02 23:35:10,579 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 6875 transitions. Word has length 151 [2023-04-02 23:35:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:10,579 INFO L495 AbstractCegarLoop]: Abstraction has 4403 states and 6875 transitions. [2023-04-02 23:35:10,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 6875 transitions. [2023-04-02 23:35:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-02 23:35:10,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:10,584 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:10,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:10,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:10,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:10,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:10,795 INFO L85 PathProgramCache]: Analyzing trace with hash 35590295, now seen corresponding path program 1 times [2023-04-02 23:35:10,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:10,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122091818] [2023-04-02 23:35:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:10,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:35:11,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122091818] [2023-04-02 23:35:11,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122091818] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064687899] [2023-04-02 23:35:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:11,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:11,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:11,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:11,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:35:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:11,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 2903 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:35:11,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 23:35:11,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064687899] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:11,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:11,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 23:35:11,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700986571] [2023-04-02 23:35:11,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:11,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:35:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:35:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:35:11,779 INFO L87 Difference]: Start difference. First operand 4403 states and 6875 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:12,163 INFO L93 Difference]: Finished difference Result 8989 states and 14553 transitions. [2023-04-02 23:35:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:35:12,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 153 [2023-04-02 23:35:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:12,191 INFO L225 Difference]: With dead ends: 8989 [2023-04-02 23:35:12,192 INFO L226 Difference]: Without dead ends: 4637 [2023-04-02 23:35:12,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:35:12,211 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 19 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:12,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1992 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:35:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2023-04-02 23:35:12,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 4583. [2023-04-02 23:35:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 3173 states have (on average 1.4311377245508983) internal successors, (4541), 3249 states have internal predecessors, (4541), 911 states have call successors, (911), 464 states have call predecessors, (911), 498 states have return successors, (1717), 909 states have call predecessors, (1717), 888 states have call successors, (1717) [2023-04-02 23:35:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 7169 transitions. [2023-04-02 23:35:12,474 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 7169 transitions. Word has length 153 [2023-04-02 23:35:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:12,475 INFO L495 AbstractCegarLoop]: Abstraction has 4583 states and 7169 transitions. [2023-04-02 23:35:12,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:12,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 7169 transitions. [2023-04-02 23:35:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-02 23:35:12,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:12,479 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:12,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:12,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:12,695 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:12,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1699142131, now seen corresponding path program 1 times [2023-04-02 23:35:12,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:12,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483589547] [2023-04-02 23:35:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:12,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:35:13,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:13,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483589547] [2023-04-02 23:35:13,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483589547] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:13,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531297165] [2023-04-02 23:35:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:13,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:13,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:13,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:13,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:35:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:13,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:35:13,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:35:13,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531297165] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:13,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:13,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 23:35:13,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729302541] [2023-04-02 23:35:13,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:13,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:35:13,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:13,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:35:13,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:35:13,761 INFO L87 Difference]: Start difference. First operand 4583 states and 7169 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:35:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:14,932 INFO L93 Difference]: Finished difference Result 11486 states and 19549 transitions. [2023-04-02 23:35:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:35:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 155 [2023-04-02 23:35:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:14,983 INFO L225 Difference]: With dead ends: 11486 [2023-04-02 23:35:14,983 INFO L226 Difference]: Without dead ends: 7871 [2023-04-02 23:35:15,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:35:15,005 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 726 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:15,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 2474 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 23:35:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2023-04-02 23:35:15,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 7722. [2023-04-02 23:35:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7722 states, 5364 states have (on average 1.4256152125279642) internal successors, (7647), 5487 states have internal predecessors, (7647), 1514 states have call successors, (1514), 782 states have call predecessors, (1514), 843 states have return successors, (3611), 1518 states have call predecessors, (3611), 1477 states have call successors, (3611) [2023-04-02 23:35:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7722 states to 7722 states and 12772 transitions. [2023-04-02 23:35:15,631 INFO L78 Accepts]: Start accepts. Automaton has 7722 states and 12772 transitions. Word has length 155 [2023-04-02 23:35:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:15,632 INFO L495 AbstractCegarLoop]: Abstraction has 7722 states and 12772 transitions. [2023-04-02 23:35:15,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:35:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 7722 states and 12772 transitions. [2023-04-02 23:35:15,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-02 23:35:15,638 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:15,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:15,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 23:35:15,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:15,849 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:15,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash 330520055, now seen corresponding path program 1 times [2023-04-02 23:35:15,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:15,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243878177] [2023-04-02 23:35:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:35:16,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:16,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243878177] [2023-04-02 23:35:16,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243878177] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:16,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161702231] [2023-04-02 23:35:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:16,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:16,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:16,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:16,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 23:35:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:16,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 2904 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:35:16,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 23:35:16,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161702231] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-02 23:35:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469897453] [2023-04-02 23:35:16,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:35:16,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:16,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:35:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:35:16,504 INFO L87 Difference]: Start difference. First operand 7722 states and 12772 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:16,997 INFO L93 Difference]: Finished difference Result 15605 states and 27224 transitions. [2023-04-02 23:35:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:35:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 155 [2023-04-02 23:35:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:17,045 INFO L225 Difference]: With dead ends: 15605 [2023-04-02 23:35:17,045 INFO L226 Difference]: Without dead ends: 7934 [2023-04-02 23:35:17,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:35:17,089 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 5 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:17,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1419 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:35:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7934 states. [2023-04-02 23:35:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7934 to 7754. [2023-04-02 23:35:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7754 states, 5396 states have (on average 1.4119718309859155) internal successors, (7619), 5519 states have internal predecessors, (7619), 1514 states have call successors, (1514), 782 states have call predecessors, (1514), 843 states have return successors, (3611), 1518 states have call predecessors, (3611), 1477 states have call successors, (3611) [2023-04-02 23:35:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7754 states to 7754 states and 12744 transitions. [2023-04-02 23:35:17,654 INFO L78 Accepts]: Start accepts. Automaton has 7754 states and 12744 transitions. Word has length 155 [2023-04-02 23:35:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:17,654 INFO L495 AbstractCegarLoop]: Abstraction has 7754 states and 12744 transitions. [2023-04-02 23:35:17,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:35:17,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7754 states and 12744 transitions. [2023-04-02 23:35:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-02 23:35:17,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:17,662 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:17,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-02 23:35:17,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 23:35:17,872 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:17,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:17,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1040890713, now seen corresponding path program 1 times [2023-04-02 23:35:17,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:17,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043692400] [2023-04-02 23:35:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:17,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:35:18,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:18,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043692400] [2023-04-02 23:35:18,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043692400] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:18,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773661242] [2023-04-02 23:35:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:18,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:18,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:18,283 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:18,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 23:35:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:18,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 2906 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:35:18,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:35:18,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:18,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773661242] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:18,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:18,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 23:35:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143655205] [2023-04-02 23:35:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:18,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:35:18,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:18,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:35:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:35:18,813 INFO L87 Difference]: Start difference. First operand 7754 states and 12744 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:35:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:20,066 INFO L93 Difference]: Finished difference Result 17754 states and 31254 transitions. [2023-04-02 23:35:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:35:20,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 156 [2023-04-02 23:35:20,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:20,124 INFO L225 Difference]: With dead ends: 17754 [2023-04-02 23:35:20,124 INFO L226 Difference]: Without dead ends: 11018 [2023-04-02 23:35:20,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:35:20,161 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 742 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 2333 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:20,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 2333 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 23:35:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11018 states. [2023-04-02 23:35:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11018 to 10886. [2023-04-02 23:35:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10886 states, 7580 states have (on average 1.4094986807387864) internal successors, (10684), 7750 states have internal predecessors, (10684), 2117 states have call successors, (2117), 1100 states have call predecessors, (2117), 1188 states have return successors, (6023), 2127 states have call predecessors, (6023), 2066 states have call successors, (6023) [2023-04-02 23:35:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10886 states to 10886 states and 18824 transitions. [2023-04-02 23:35:20,940 INFO L78 Accepts]: Start accepts. Automaton has 10886 states and 18824 transitions. Word has length 156 [2023-04-02 23:35:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:20,940 INFO L495 AbstractCegarLoop]: Abstraction has 10886 states and 18824 transitions. [2023-04-02 23:35:20,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:35:20,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10886 states and 18824 transitions. [2023-04-02 23:35:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-02 23:35:20,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:20,945 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:20,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:21,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:21,155 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:21,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1015659645, now seen corresponding path program 1 times [2023-04-02 23:35:21,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:21,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446239449] [2023-04-02 23:35:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:21,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:35:21,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:21,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446239449] [2023-04-02 23:35:21,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446239449] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:21,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159106636] [2023-04-02 23:35:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:21,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:21,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:21,569 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:21,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 23:35:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:22,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:35:22,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:35:22,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:22,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159106636] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:22,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:22,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 23:35:22,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368688480] [2023-04-02 23:35:22,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:22,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:35:22,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:22,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:35:22,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:35:22,082 INFO L87 Difference]: Start difference. First operand 10886 states and 18824 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:35:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:23,492 INFO L93 Difference]: Finished difference Result 23478 states and 42539 transitions. [2023-04-02 23:35:23,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:35:23,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 157 [2023-04-02 23:35:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:23,573 INFO L225 Difference]: With dead ends: 23478 [2023-04-02 23:35:23,574 INFO L226 Difference]: Without dead ends: 13656 [2023-04-02 23:35:23,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:35:23,620 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 761 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:23,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 2297 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 23:35:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13656 states. [2023-04-02 23:35:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13656 to 13207. [2023-04-02 23:35:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13207 states, 9106 states have (on average 1.406325499670547) internal successors, (12806), 9316 states have internal predecessors, (12806), 2640 states have call successors, (2640), 1365 states have call predecessors, (2640), 1460 states have return successors, (7973), 2643 states have call predecessors, (7973), 2579 states have call successors, (7973) [2023-04-02 23:35:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13207 states to 13207 states and 23419 transitions. [2023-04-02 23:35:24,688 INFO L78 Accepts]: Start accepts. Automaton has 13207 states and 23419 transitions. Word has length 157 [2023-04-02 23:35:24,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:24,689 INFO L495 AbstractCegarLoop]: Abstraction has 13207 states and 23419 transitions. [2023-04-02 23:35:24,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:35:24,689 INFO L276 IsEmpty]: Start isEmpty. Operand 13207 states and 23419 transitions. [2023-04-02 23:35:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-02 23:35:24,694 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:24,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:24,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:24,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 23:35:24,905 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:24,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1147990690, now seen corresponding path program 1 times [2023-04-02 23:35:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:24,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368327449] [2023-04-02 23:35:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 23:35:25,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:25,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368327449] [2023-04-02 23:35:25,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368327449] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:25,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111430089] [2023-04-02 23:35:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:25,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:25,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:25,112 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:25,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 23:35:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:25,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:35:25,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:35:25,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:35:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 23:35:25,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111430089] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:35:25,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1382978229] [2023-04-02 23:35:25,998 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2023-04-02 23:35:25,998 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:35:26,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:35:26,018 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:35:26,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:35:28,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 178 for LOIs [2023-04-02 23:35:28,867 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 230 for LOIs [2023-04-02 23:35:31,421 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 230 for LOIs [2023-04-02 23:35:31,851 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 230 for LOIs [2023-04-02 23:35:35,196 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 123071 conjuctions. This might take some time...