/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_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:34:36,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:34:36,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:34:36,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:34:36,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:34:36,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:34:36,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:34:36,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:34:36,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:34:36,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:34:36,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:34:36,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:34:36,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:34:36,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:34:36,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:34:36,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:34:36,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:34:36,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:34:36,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:34:36,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:34:36,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:34:36,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:34:36,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:34:36,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:34:36,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:34:36,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:34:36,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:34:36,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:34:36,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:34:36,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:34:36,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:34:36,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:34:36,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:34:36,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:34:36,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:34:36,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:34:36,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:34:36,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:34:36,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:34:36,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:34:36,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:34:36,970 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 23:34:37,002 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:34:37,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:34:37,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:34:37,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:34:37,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:34:37,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:34:37,004 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:34:37,004 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:34:37,004 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:34:37,004 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:34:37,005 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:34:37,005 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:34:37,005 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:34:37,005 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:34:37,006 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:34:37,006 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:34:37,006 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:34:37,006 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:34:37,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:34:37,006 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:34:37,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:34:37,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:34:37,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:34:37,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:34:37,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:34:37,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:34:37,008 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:34:37,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:34:37,008 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:34:37,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:34:37,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:34:37,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:34:37,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:34:37,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:34:37,009 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:34:37,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:34:37,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:34:37,009 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:34:37,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:34:37,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:34:37,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:34:37,009 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:34:37,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:34:37,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:34:37,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:34:37,283 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:34:37,284 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:34:37,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2023-04-02 23:34:38,463 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:34:38,789 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:34:38,791 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2023-04-02 23:34:38,814 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54685b6c2/8d4d03083b9747559180972291fc3407/FLAGe6c612f8d [2023-04-02 23:34:38,827 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54685b6c2/8d4d03083b9747559180972291fc3407 [2023-04-02 23:34:38,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:34:38,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:34:38,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:34:38,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:34:38,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:34:38,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:34:38" (1/1) ... [2023-04-02 23:34:38,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a8d6c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:38, skipping insertion in model container [2023-04-02 23:34:38,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:34:38" (1/1) ... [2023-04-02 23:34:38,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:34:38,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:34:39,337 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_product21.cil.c[58922,58935] [2023-04-02 23:34:39,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:34:39,413 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:34:39,477 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_product21.cil.c[58922,58935] [2023-04-02 23:34:39,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:34:39,529 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:34:39,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39 WrapperNode [2023-04-02 23:34:39,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:34:39,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:34:39,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:34:39,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:34:39,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (1/1) ... [2023-04-02 23:34:39,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (1/1) ... [2023-04-02 23:34:39,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (1/1) ... [2023-04-02 23:34:39,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (1/1) ... [2023-04-02 23:34:39,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (1/1) ... [2023-04-02 23:34:39,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (1/1) ... [2023-04-02 23:34:39,679 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (1/1) ... [2023-04-02 23:34:39,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (1/1) ... [2023-04-02 23:34:39,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:34:39,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:34:39,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:34:39,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:34:39,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (1/1) ... [2023-04-02 23:34:39,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:34:39,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:39,750 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 23:34:39,771 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 23:34:39,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:34:39,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:34:39,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:34:39,784 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:34:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:34:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:34:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:34:39,789 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:34:39,789 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:34:39,789 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:34:39,789 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:34:39,789 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:34:39,790 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:34:39,790 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:34:39,791 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:34:39,791 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:34:39,791 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:34:39,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:34:39,791 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:34:39,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:34:39,791 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-04-02 23:34:39,791 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:34:39,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:34:39,792 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:34:39,792 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-02 23:34:39,792 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:34:39,792 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:34:39,793 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:34:39,793 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:34:39,793 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:34:39,793 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:34:39,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:34:39,795 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:34:39,795 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:34:39,795 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:34:39,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:34:39,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:34:39,796 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:34:39,797 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:34:39,797 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:34:39,797 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:34:39,797 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:34:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:34:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:34:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:34:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:34:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:34:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:34:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:34:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:34:39,798 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:34:39,799 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:34:39,800 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:34:39,801 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:34:39,802 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:34:39,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:34:39,802 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:34:39,802 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:34:39,803 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:34:39,804 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:34:39,804 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:34:39,804 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:34:39,804 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:34:39,805 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:34:39,805 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:34:39,805 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:34:39,805 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:34:39,805 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2023-04-02 23:34:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:34:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:34:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:34:40,074 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:34:40,076 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:34:41,426 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:34:42,203 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:34:42,204 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:34:42,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:34:42 BoogieIcfgContainer [2023-04-02 23:34:42,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:34:42,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:34:42,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:34:42,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:34:42,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:34:38" (1/3) ... [2023-04-02 23:34:42,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e6502f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:34:42, skipping insertion in model container [2023-04-02 23:34:42,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:39" (2/3) ... [2023-04-02 23:34:42,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e6502f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:34:42, skipping insertion in model container [2023-04-02 23:34:42,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:34:42" (3/3) ... [2023-04-02 23:34:42,215 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2023-04-02 23:34:42,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:34:42,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:34:42,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:34:42,295 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;@6a50aeb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:34:42,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:34:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 587 states, 353 states have (on average 1.5127478753541077) internal successors, (534), 377 states have internal predecessors, (534), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) [2023-04-02 23:34:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 23:34:42,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:42,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:42,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:42,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash -302144199, now seen corresponding path program 1 times [2023-04-02 23:34:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:42,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047959101] [2023-04-02 23:34:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:42,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 23:34:42,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:42,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047959101] [2023-04-02 23:34:42,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047959101] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:34:42,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995314336] [2023-04-02 23:34:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:42,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:42,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:42,875 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 23:34:42,877 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 23:34:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:43,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 23:34:43,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 23:34:43,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:34:43,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995314336] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:43,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:34:43,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-04-02 23:34:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897633931] [2023-04-02 23:34:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:34:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:34:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:34:43,535 INFO L87 Difference]: Start difference. First operand has 587 states, 353 states have (on average 1.5127478753541077) internal successors, (534), 377 states have internal predecessors, (534), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:34:43,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:43,728 INFO L93 Difference]: Finished difference Result 924 states and 1414 transitions. [2023-04-02 23:34:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:34:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 127 [2023-04-02 23:34:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:43,755 INFO L225 Difference]: With dead ends: 924 [2023-04-02 23:34:43,756 INFO L226 Difference]: Without dead ends: 470 [2023-04-02 23:34:43,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:34:43,773 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:43,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 680 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:34:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-04-02 23:34:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2023-04-02 23:34:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 303 states have (on average 1.528052805280528) internal successors, (463), 319 states have internal predecessors, (463), 123 states have call successors, (123), 48 states have call predecessors, (123), 43 states have return successors, (117), 114 states have call predecessors, (117), 117 states have call successors, (117) [2023-04-02 23:34:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 703 transitions. [2023-04-02 23:34:43,878 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 703 transitions. Word has length 127 [2023-04-02 23:34:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:43,879 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 703 transitions. [2023-04-02 23:34:43,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:34:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 703 transitions. [2023-04-02 23:34:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 23:34:43,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:43,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:43,898 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 23:34:44,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 23:34:44,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:44,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1016180089, now seen corresponding path program 1 times [2023-04-02 23:34:44,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:44,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879189753] [2023-04-02 23:34:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:44,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:44,973 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 23:34:44,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:44,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879189753] [2023-04-02 23:34:44,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879189753] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:44,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:44,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:34:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8707029] [2023-04-02 23:34:44,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:44,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:34:44,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:34:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:34:44,980 INFO L87 Difference]: Start difference. First operand 470 states and 703 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:34:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:45,436 INFO L93 Difference]: Finished difference Result 1345 states and 2049 transitions. [2023-04-02 23:34:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 23:34:45,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 127 [2023-04-02 23:34:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:45,447 INFO L225 Difference]: With dead ends: 1345 [2023-04-02 23:34:45,448 INFO L226 Difference]: Without dead ends: 912 [2023-04-02 23:34:45,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:34:45,451 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 1064 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 4527 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:45,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 4527 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:34:45,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-04-02 23:34:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 896. [2023-04-02 23:34:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 591 states have (on average 1.5397631133671743) internal successors, (910), 618 states have internal predecessors, (910), 224 states have call successors, (224), 83 states have call predecessors, (224), 80 states have return successors, (227), 218 states have call predecessors, (227), 217 states have call successors, (227) [2023-04-02 23:34:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1361 transitions. [2023-04-02 23:34:45,536 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1361 transitions. Word has length 127 [2023-04-02 23:34:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:45,536 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1361 transitions. [2023-04-02 23:34:45,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:34:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1361 transitions. [2023-04-02 23:34:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-02 23:34:45,546 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:45,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:45,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:34:45,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:45,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1449509862, now seen corresponding path program 1 times [2023-04-02 23:34:45,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:45,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795246720] [2023-04-02 23:34:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:45,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:45,934 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 23:34:45,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:45,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795246720] [2023-04-02 23:34:45,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795246720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:45,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:45,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:34:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104090248] [2023-04-02 23:34:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:45,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:34:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:34:45,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:34:45,937 INFO L87 Difference]: Start difference. First operand 896 states and 1361 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:34:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:46,122 INFO L93 Difference]: Finished difference Result 1353 states and 2073 transitions. [2023-04-02 23:34:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:34:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 132 [2023-04-02 23:34:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:46,128 INFO L225 Difference]: With dead ends: 1353 [2023-04-02 23:34:46,128 INFO L226 Difference]: Without dead ends: 918 [2023-04-02 23:34:46,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:34:46,131 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 6 mSDsluCounter, 3343 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4021 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:46,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4021 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:34:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-04-02 23:34:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 910. [2023-04-02 23:34:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 601 states have (on average 1.5307820299500832) internal successors, (920), 628 states have internal predecessors, (920), 224 states have call successors, (224), 83 states have call predecessors, (224), 84 states have return successors, (237), 222 states have call predecessors, (237), 217 states have call successors, (237) [2023-04-02 23:34:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1381 transitions. [2023-04-02 23:34:46,169 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1381 transitions. Word has length 132 [2023-04-02 23:34:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:46,169 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1381 transitions. [2023-04-02 23:34:46,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:34:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1381 transitions. [2023-04-02 23:34:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-02 23:34:46,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:46,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:46,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:34:46,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:46,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1807680061, now seen corresponding path program 1 times [2023-04-02 23:34:46,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:46,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401330163] [2023-04-02 23:34:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:46,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:46,529 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 23:34:46,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401330163] [2023-04-02 23:34:46,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401330163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:46,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:46,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:34:46,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135165882] [2023-04-02 23:34:46,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:46,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:34:46,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:34:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:34:46,532 INFO L87 Difference]: Start difference. First operand 910 states and 1381 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:34:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:46,729 INFO L93 Difference]: Finished difference Result 1370 states and 2095 transitions. [2023-04-02 23:34:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:34:46,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 131 [2023-04-02 23:34:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:46,735 INFO L225 Difference]: With dead ends: 1370 [2023-04-02 23:34:46,736 INFO L226 Difference]: Without dead ends: 928 [2023-04-02 23:34:46,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:34:46,744 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 6 mSDsluCounter, 3343 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4021 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:46,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4021 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:34:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2023-04-02 23:34:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 912. [2023-04-02 23:34:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 603 states have (on average 1.529021558872305) internal successors, (922), 628 states have internal predecessors, (922), 224 states have call successors, (224), 83 states have call predecessors, (224), 84 states have return successors, (237), 224 states have call predecessors, (237), 217 states have call successors, (237) [2023-04-02 23:34:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1383 transitions. [2023-04-02 23:34:46,785 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1383 transitions. Word has length 131 [2023-04-02 23:34:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:46,787 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1383 transitions. [2023-04-02 23:34:46,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:34:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1383 transitions. [2023-04-02 23:34:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-02 23:34:46,791 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:46,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:46,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:34:46,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:46,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash -867480006, now seen corresponding path program 1 times [2023-04-02 23:34:46,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:46,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974142077] [2023-04-02 23:34:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:46,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:47,124 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 23:34:47,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:47,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974142077] [2023-04-02 23:34:47,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974142077] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:47,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:47,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:34:47,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240455774] [2023-04-02 23:34:47,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:47,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:34:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:47,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:34:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:34:47,126 INFO L87 Difference]: Start difference. First operand 912 states and 1383 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:34:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:47,308 INFO L93 Difference]: Finished difference Result 1373 states and 2098 transitions. [2023-04-02 23:34:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:34:47,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 132 [2023-04-02 23:34:47,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:47,313 INFO L225 Difference]: With dead ends: 1373 [2023-04-02 23:34:47,313 INFO L226 Difference]: Without dead ends: 930 [2023-04-02 23:34:47,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:34:47,315 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 6 mSDsluCounter, 3343 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4021 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:47,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4021 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:34:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2023-04-02 23:34:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 914. [2023-04-02 23:34:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 605 states have (on average 1.5272727272727273) internal successors, (924), 628 states have internal predecessors, (924), 224 states have call successors, (224), 83 states have call predecessors, (224), 84 states have return successors, (237), 226 states have call predecessors, (237), 217 states have call successors, (237) [2023-04-02 23:34:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1385 transitions. [2023-04-02 23:34:47,349 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1385 transitions. Word has length 132 [2023-04-02 23:34:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:47,349 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1385 transitions. [2023-04-02 23:34:47,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:34:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1385 transitions. [2023-04-02 23:34:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-02 23:34:47,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:47,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:47,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:34:47,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:47,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:47,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1925586926, now seen corresponding path program 1 times [2023-04-02 23:34:47,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:47,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21768792] [2023-04-02 23:34:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:47,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:47,808 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 23:34:47,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21768792] [2023-04-02 23:34:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21768792] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:47,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:47,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:34:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799566930] [2023-04-02 23:34:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:47,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:34:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:34:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:34:47,810 INFO L87 Difference]: Start difference. First operand 914 states and 1385 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-02 23:34:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:48,736 INFO L93 Difference]: Finished difference Result 1929 states and 2950 transitions. [2023-04-02 23:34:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:34:48,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 136 [2023-04-02 23:34:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:48,749 INFO L225 Difference]: With dead ends: 1929 [2023-04-02 23:34:48,749 INFO L226 Difference]: Without dead ends: 1360 [2023-04-02 23:34:48,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:34:48,755 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 1249 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:48,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 2148 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 23:34:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2023-04-02 23:34:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1341. [2023-04-02 23:34:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 881 states have (on average 1.4824063564131669) internal successors, (1306), 915 states have internal predecessors, (1306), 328 states have call successors, (328), 126 states have call predecessors, (328), 131 states have return successors, (367), 335 states have call predecessors, (367), 320 states have call successors, (367) [2023-04-02 23:34:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2001 transitions. [2023-04-02 23:34:48,814 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2001 transitions. Word has length 136 [2023-04-02 23:34:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:48,816 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 2001 transitions. [2023-04-02 23:34:48,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-02 23:34:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2001 transitions. [2023-04-02 23:34:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-02 23:34:48,819 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:48,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:48,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:34:48,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:48,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:48,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1610757857, now seen corresponding path program 1 times [2023-04-02 23:34:48,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:48,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313566628] [2023-04-02 23:34:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:48,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:49,278 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 23:34:49,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:49,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313566628] [2023-04-02 23:34:49,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313566628] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:49,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:49,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:34:49,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805302898] [2023-04-02 23:34:49,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:49,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:34:49,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:49,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:34:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:34:49,281 INFO L87 Difference]: Start difference. First operand 1341 states and 2001 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-02 23:34:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:49,668 INFO L93 Difference]: Finished difference Result 2501 states and 3799 transitions. [2023-04-02 23:34:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:34:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) Word has length 139 [2023-04-02 23:34:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:49,677 INFO L225 Difference]: With dead ends: 2501 [2023-04-02 23:34:49,677 INFO L226 Difference]: Without dead ends: 1489 [2023-04-02 23:34:49,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:34:49,683 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 232 mSDsluCounter, 4602 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 5299 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:49,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 5299 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:34:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2023-04-02 23:34:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1489. [2023-04-02 23:34:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1016 states have (on average 1.4872047244094488) internal successors, (1511), 1055 states have internal predecessors, (1511), 332 states have call successors, (332), 130 states have call predecessors, (332), 140 states have return successors, (371), 339 states have call predecessors, (371), 324 states have call successors, (371) [2023-04-02 23:34:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2214 transitions. [2023-04-02 23:34:49,754 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2214 transitions. Word has length 139 [2023-04-02 23:34:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:49,755 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 2214 transitions. [2023-04-02 23:34:49,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-02 23:34:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2214 transitions. [2023-04-02 23:34:49,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-02 23:34:49,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:49,760 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:49,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:34:49,760 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:49,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash -476402017, now seen corresponding path program 1 times [2023-04-02 23:34:49,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:49,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745557585] [2023-04-02 23:34:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:50,213 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 23:34:50,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:50,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745557585] [2023-04-02 23:34:50,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745557585] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:50,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:50,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:34:50,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413660652] [2023-04-02 23:34:50,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:50,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:34:50,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:34:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:34:50,216 INFO L87 Difference]: Start difference. First operand 1489 states and 2214 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-02 23:34:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:51,187 INFO L93 Difference]: Finished difference Result 5729 states and 8876 transitions. [2023-04-02 23:34:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:34:51,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 139 [2023-04-02 23:34:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:51,219 INFO L225 Difference]: With dead ends: 5729 [2023-04-02 23:34:51,219 INFO L226 Difference]: Without dead ends: 4277 [2023-04-02 23:34:51,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:34:51,232 INFO L413 NwaCegarLoop]: 1344 mSDtfsCounter, 1305 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:51,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 2663 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 23:34:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2023-04-02 23:34:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 4224. [2023-04-02 23:34:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 2939 states have (on average 1.483157536577067) internal successors, (4359), 3051 states have internal predecessors, (4359), 890 states have call successors, (890), 353 states have call predecessors, (890), 394 states have return successors, (1184), 909 states have call predecessors, (1184), 876 states have call successors, (1184) [2023-04-02 23:34:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 6433 transitions. [2023-04-02 23:34:51,457 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 6433 transitions. Word has length 139 [2023-04-02 23:34:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:51,458 INFO L495 AbstractCegarLoop]: Abstraction has 4224 states and 6433 transitions. [2023-04-02 23:34:51,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-02 23:34:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 6433 transitions. [2023-04-02 23:34:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-02 23:34:51,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:51,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:51,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:34:51,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:51,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:51,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1055239108, now seen corresponding path program 1 times [2023-04-02 23:34:51,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:51,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828781632] [2023-04-02 23:34:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:51,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:52,023 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 23:34:52,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:52,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828781632] [2023-04-02 23:34:52,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828781632] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:52,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:52,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:34:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291288190] [2023-04-02 23:34:52,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:52,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:34:52,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:34:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:34:52,025 INFO L87 Difference]: Start difference. First operand 4224 states and 6433 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-02 23:34:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:52,663 INFO L93 Difference]: Finished difference Result 7242 states and 11098 transitions. [2023-04-02 23:34:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:34:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 140 [2023-04-02 23:34:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:52,692 INFO L225 Difference]: With dead ends: 7242 [2023-04-02 23:34:52,692 INFO L226 Difference]: Without dead ends: 4264 [2023-04-02 23:34:52,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:34:52,712 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 581 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:52,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 3000 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:34:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2023-04-02 23:34:52,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 4239. [2023-04-02 23:34:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 2948 states have (on average 1.4816824966078697) internal successors, (4368), 3063 states have internal predecessors, (4368), 893 states have call successors, (893), 356 states have call predecessors, (893), 397 states have return successors, (1193), 909 states have call predecessors, (1193), 879 states have call successors, (1193) [2023-04-02 23:34:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 6454 transitions. [2023-04-02 23:34:53,013 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 6454 transitions. Word has length 140 [2023-04-02 23:34:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:53,013 INFO L495 AbstractCegarLoop]: Abstraction has 4239 states and 6454 transitions. [2023-04-02 23:34:53,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-02 23:34:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 6454 transitions. [2023-04-02 23:34:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-02 23:34:53,018 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:53,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:53,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:34:53,019 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:53,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:53,019 INFO L85 PathProgramCache]: Analyzing trace with hash 829498051, now seen corresponding path program 1 times [2023-04-02 23:34:53,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:53,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906995446] [2023-04-02 23:34:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 23:34:53,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:53,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906995446] [2023-04-02 23:34:53,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906995446] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:34:53,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083868228] [2023-04-02 23:34:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:53,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:53,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:53,204 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 23:34:53,206 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 23:34:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:53,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:34:53,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 23:34:53,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:34:53,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083868228] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:53,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:34:53,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-02 23:34:53,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971120054] [2023-04-02 23:34:53,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:53,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:34:53,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:53,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:34:53,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:34:53,726 INFO L87 Difference]: Start difference. First operand 4239 states and 6454 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, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:34:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:54,026 INFO L93 Difference]: Finished difference Result 8495 states and 13136 transitions. [2023-04-02 23:34:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:34:54,027 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, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 145 [2023-04-02 23:34:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:54,053 INFO L225 Difference]: With dead ends: 8495 [2023-04-02 23:34:54,054 INFO L226 Difference]: Without dead ends: 4293 [2023-04-02 23:34:54,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 146 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 23:34:54,079 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 85 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:54,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1893 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:34:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2023-04-02 23:34:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4293. [2023-04-02 23:34:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 2993 states have (on average 1.4774473772134982) internal successors, (4422), 3108 states have internal predecessors, (4422), 893 states have call successors, (893), 365 states have call predecessors, (893), 406 states have return successors, (1193), 909 states have call predecessors, (1193), 879 states have call successors, (1193) [2023-04-02 23:34:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6508 transitions. [2023-04-02 23:34:54,340 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6508 transitions. Word has length 145 [2023-04-02 23:34:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:54,341 INFO L495 AbstractCegarLoop]: Abstraction has 4293 states and 6508 transitions. [2023-04-02 23:34:54,341 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, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:34:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6508 transitions. [2023-04-02 23:34:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-02 23:34:54,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:54,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:54,359 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 23:34:54,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 23:34:54,558 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:54,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1085575162, now seen corresponding path program 1 times [2023-04-02 23:34:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:54,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879696817] [2023-04-02 23:34:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:54,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:34:54,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:54,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879696817] [2023-04-02 23:34:54,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879696817] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:34:54,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070161257] [2023-04-02 23:34:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:54,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:54,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:54,816 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 23:34:54,819 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 23:34:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:55,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:34:55,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 23:34:55,354 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:34:55,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070161257] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:55,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:34:55,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 23:34:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144474515] [2023-04-02 23:34:55,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:55,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:34:55,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:34:55,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:34:55,356 INFO L87 Difference]: Start difference. First operand 4293 states and 6508 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:34:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:55,614 INFO L93 Difference]: Finished difference Result 8576 states and 13158 transitions. [2023-04-02 23:34:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:34:55,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 147 [2023-04-02 23:34:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:55,651 INFO L225 Difference]: With dead ends: 8576 [2023-04-02 23:34:55,651 INFO L226 Difference]: Without dead ends: 4284 [2023-04-02 23:34:55,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 147 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 23:34:55,676 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 91 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:55,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1889 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:34:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2023-04-02 23:34:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 4284. [2023-04-02 23:34:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 2984 states have (on average 1.4698391420911527) internal successors, (4386), 3099 states have internal predecessors, (4386), 893 states have call successors, (893), 365 states have call predecessors, (893), 406 states have return successors, (1193), 909 states have call predecessors, (1193), 879 states have call successors, (1193) [2023-04-02 23:34:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 6472 transitions. [2023-04-02 23:34:55,906 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 6472 transitions. Word has length 147 [2023-04-02 23:34:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:55,907 INFO L495 AbstractCegarLoop]: Abstraction has 4284 states and 6472 transitions. [2023-04-02 23:34:55,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:34:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 6472 transitions. [2023-04-02 23:34:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-02 23:34:55,910 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:55,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:55,921 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 23:34:56,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:56,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:56,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:56,121 INFO L85 PathProgramCache]: Analyzing trace with hash 133225845, now seen corresponding path program 1 times [2023-04-02 23:34:56,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:56,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855516357] [2023-04-02 23:34:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:56,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:34:56,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:56,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855516357] [2023-04-02 23:34:56,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855516357] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:34:56,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139270967] [2023-04-02 23:34:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:56,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:56,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:56,372 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 23:34:56,374 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 23:34:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:56,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:34:56,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 23:34:56,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:34:56,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139270967] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:56,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:34:56,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 23:34:56,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140656016] [2023-04-02 23:34:56,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:56,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:34:56,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:56,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:34:56,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:34:56,931 INFO L87 Difference]: Start difference. First operand 4284 states and 6472 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:34:57,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:57,976 INFO L93 Difference]: Finished difference Result 11000 states and 17293 transitions. [2023-04-02 23:34:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:34:57,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 147 [2023-04-02 23:34:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:58,017 INFO L225 Difference]: With dead ends: 11000 [2023-04-02 23:34:58,017 INFO L226 Difference]: Without dead ends: 6753 [2023-04-02 23:34:58,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 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 23:34:58,034 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 681 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:58,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 1973 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 23:34:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6753 states. [2023-04-02 23:34:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6753 to 6674. [2023-04-02 23:34:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6674 states, 4633 states have (on average 1.4463630477012734) internal successors, (6701), 4827 states have internal predecessors, (6701), 1399 states have call successors, (1399), 577 states have call predecessors, (1399), 641 states have return successors, (2114), 1419 states have call predecessors, (2114), 1379 states have call successors, (2114) [2023-04-02 23:34:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6674 states to 6674 states and 10214 transitions. [2023-04-02 23:34:58,389 INFO L78 Accepts]: Start accepts. Automaton has 6674 states and 10214 transitions. Word has length 147 [2023-04-02 23:34:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:58,390 INFO L495 AbstractCegarLoop]: Abstraction has 6674 states and 10214 transitions. [2023-04-02 23:34:58,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:34:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 6674 states and 10214 transitions. [2023-04-02 23:34:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 23:34:58,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:58,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:58,411 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 23:34:58,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:58,606 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:58,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:58,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1179963397, now seen corresponding path program 1 times [2023-04-02 23:34:58,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:58,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235983772] [2023-04-02 23:34:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:58,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:34:59,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235983772] [2023-04-02 23:34:59,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235983772] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:34:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827913040] [2023-04-02 23:34:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:59,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:59,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:59,112 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 23:34:59,115 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 23:34:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:59,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 2669 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 23:34:59,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:34:59,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:34:59,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827913040] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:59,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:34:59,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-04-02 23:34:59,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169824122] [2023-04-02 23:34:59,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:59,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:34:59,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:59,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:34:59,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:34:59,828 INFO L87 Difference]: Start difference. First operand 6674 states and 10214 transitions. Second operand has 7 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-02 23:35:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:00,875 INFO L93 Difference]: Finished difference Result 14584 states and 22847 transitions. [2023-04-02 23:35:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:35:00,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 149 [2023-04-02 23:35:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:00,919 INFO L225 Difference]: With dead ends: 14584 [2023-04-02 23:35:00,919 INFO L226 Difference]: Without dead ends: 7947 [2023-04-02 23:35:00,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 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 23:35:00,948 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 1264 mSDsluCounter, 2291 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:00,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1267 Valid, 3174 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 23:35:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2023-04-02 23:35:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 7923. [2023-04-02 23:35:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7923 states, 5505 states have (on average 1.4272479564032698) internal successors, (7857), 5709 states have internal predecessors, (7857), 1591 states have call successors, (1591), 755 states have call predecessors, (1591), 826 states have return successors, (3106), 1608 states have call predecessors, (3106), 1559 states have call successors, (3106) [2023-04-02 23:35:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7923 states to 7923 states and 12554 transitions. [2023-04-02 23:35:01,487 INFO L78 Accepts]: Start accepts. Automaton has 7923 states and 12554 transitions. Word has length 149 [2023-04-02 23:35:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:01,487 INFO L495 AbstractCegarLoop]: Abstraction has 7923 states and 12554 transitions. [2023-04-02 23:35:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-02 23:35:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 7923 states and 12554 transitions. [2023-04-02 23:35:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-02 23:35:01,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:01,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:01,505 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 23:35:01,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 23:35:01,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:01,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:01,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1916250038, now seen corresponding path program 1 times [2023-04-02 23:35:01,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:01,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400236080] [2023-04-02 23:35:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:01,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:35:01,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400236080] [2023-04-02 23:35:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400236080] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901171863] [2023-04-02 23:35:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:01,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:01,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:01,954 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 23:35:01,957 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 23:35:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:02,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 2670 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:35:02,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:35:02,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:02,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901171863] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:02,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:02,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 23:35:02,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359846334] [2023-04-02 23:35:02,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:02,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:35:02,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:02,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:35:02,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:35:02,489 INFO L87 Difference]: Start difference. First operand 7923 states and 12554 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:35:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:03,025 INFO L93 Difference]: Finished difference Result 15950 states and 25909 transitions. [2023-04-02 23:35:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:35:03,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) Word has length 148 [2023-04-02 23:35:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:03,062 INFO L225 Difference]: With dead ends: 15950 [2023-04-02 23:35:03,062 INFO L226 Difference]: Without dead ends: 8077 [2023-04-02 23:35:03,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 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 23:35:03,094 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 2 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2665 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:03,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2665 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:35:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8077 states. [2023-04-02 23:35:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8077 to 7999. [2023-04-02 23:35:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7999 states, 5558 states have (on average 1.4231738035264483) internal successors, (7910), 5770 states have internal predecessors, (7910), 1591 states have call successors, (1591), 755 states have call predecessors, (1591), 849 states have return successors, (3131), 1623 states have call predecessors, (3131), 1559 states have call successors, (3131) [2023-04-02 23:35:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7999 states to 7999 states and 12632 transitions. [2023-04-02 23:35:03,500 INFO L78 Accepts]: Start accepts. Automaton has 7999 states and 12632 transitions. Word has length 148 [2023-04-02 23:35:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:03,501 INFO L495 AbstractCegarLoop]: Abstraction has 7999 states and 12632 transitions. [2023-04-02 23:35:03,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:35:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7999 states and 12632 transitions. [2023-04-02 23:35:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-02 23:35:03,504 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:03,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:03,516 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 23:35:03,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:03,716 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:03,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:03,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2067454122, now seen corresponding path program 1 times [2023-04-02 23:35:03,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:03,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889844716] [2023-04-02 23:35:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:03,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:35:04,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:04,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889844716] [2023-04-02 23:35:04,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889844716] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:04,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469871452] [2023-04-02 23:35:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:04,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:04,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:04,105 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 23:35:04,107 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 23:35:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:04,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:35:04,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:35:04,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469871452] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:04,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:04,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:35:04,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821949243] [2023-04-02 23:35:04,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:04,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:35:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:35:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:35:04,601 INFO L87 Difference]: Start difference. First operand 7999 states and 12632 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:35:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:05,208 INFO L93 Difference]: Finished difference Result 16293 states and 26566 transitions. [2023-04-02 23:35:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:35:05,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 151 [2023-04-02 23:35:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:05,262 INFO L225 Difference]: With dead ends: 16293 [2023-04-02 23:35:05,262 INFO L226 Difference]: Without dead ends: 8345 [2023-04-02 23:35:05,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:35:05,309 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 19 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:05,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1851 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:35:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states. [2023-04-02 23:35:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8345 to 8286. [2023-04-02 23:35:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8286 states, 5836 states have (on average 1.432145305003427) internal successors, (8358), 6057 states have internal predecessors, (8358), 1591 states have call successors, (1591), 755 states have call predecessors, (1591), 858 states have return successors, (3140), 1623 states have call predecessors, (3140), 1559 states have call successors, (3140) [2023-04-02 23:35:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8286 states to 8286 states and 13089 transitions. [2023-04-02 23:35:05,736 INFO L78 Accepts]: Start accepts. Automaton has 8286 states and 13089 transitions. Word has length 151 [2023-04-02 23:35:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:05,737 INFO L495 AbstractCegarLoop]: Abstraction has 8286 states and 13089 transitions. [2023-04-02 23:35:05,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:35:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 8286 states and 13089 transitions. [2023-04-02 23:35:05,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-02 23:35:05,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:05,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:05,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:05,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:05,960 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:05,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:05,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1961042279, now seen corresponding path program 1 times [2023-04-02 23:35:05,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:05,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228972959] [2023-04-02 23:35:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:05,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:35:06,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228972959] [2023-04-02 23:35:06,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228972959] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856657478] [2023-04-02 23:35:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:06,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:06,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:06,473 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 23:35:06,475 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 23:35:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:06,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 2676 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:35:06,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 23:35:07,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:07,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856657478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:07,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:07,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-04-02 23:35:07,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939816012] [2023-04-02 23:35:07,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:07,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:35:07,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:35:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:35:07,030 INFO L87 Difference]: Start difference. First operand 8286 states and 13089 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:35:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:08,317 INFO L93 Difference]: Finished difference Result 21346 states and 36351 transitions. [2023-04-02 23:35:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:35:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 152 [2023-04-02 23:35:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:08,419 INFO L225 Difference]: With dead ends: 21346 [2023-04-02 23:35:08,419 INFO L226 Difference]: Without dead ends: 14418 [2023-04-02 23:35:08,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:35:08,497 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 689 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:08,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 2051 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 23:35:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14418 states. [2023-04-02 23:35:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14418 to 13881. [2023-04-02 23:35:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13881 states, 9708 states have (on average 1.4321178409559125) internal successors, (13903), 10082 states have internal predecessors, (13903), 2719 states have call successors, (2719), 1303 states have call predecessors, (2719), 1453 states have return successors, (6655), 2765 states have call predecessors, (6655), 2663 states have call successors, (6655) [2023-04-02 23:35:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13881 states to 13881 states and 23277 transitions. [2023-04-02 23:35:09,384 INFO L78 Accepts]: Start accepts. Automaton has 13881 states and 23277 transitions. Word has length 152 [2023-04-02 23:35:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:09,385 INFO L495 AbstractCegarLoop]: Abstraction has 13881 states and 23277 transitions. [2023-04-02 23:35:09,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:35:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 13881 states and 23277 transitions. [2023-04-02 23:35:09,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-02 23:35:09,389 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:09,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:09,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:09,599 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,SelfDestructingSolverStorable15 [2023-04-02 23:35:09,599 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:09,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash 68619907, now seen corresponding path program 1 times [2023-04-02 23:35:09,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:09,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538262221] [2023-04-02 23:35:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:09,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:35:09,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538262221] [2023-04-02 23:35:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538262221] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813973795] [2023-04-02 23:35:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:09,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:09,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:09,795 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 23:35:09,798 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 23:35:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:10,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:35:10,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 23:35:10,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:10,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813973795] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:10,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:10,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-02 23:35:10,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809724047] [2023-04-02 23:35:10,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:10,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:35:10,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:35:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:35:10,382 INFO L87 Difference]: Start difference. First operand 13881 states and 23277 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:35:11,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:11,009 INFO L93 Difference]: Finished difference Result 28064 states and 49518 transitions. [2023-04-02 23:35:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:35:11,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 152 [2023-04-02 23:35:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:11,121 INFO L225 Difference]: With dead ends: 28064 [2023-04-02 23:35:11,121 INFO L226 Difference]: Without dead ends: 14234 [2023-04-02 23:35:11,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 153 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 23:35:11,223 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 4 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:11,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1975 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:35:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14234 states. [2023-04-02 23:35:12,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14234 to 13937. [2023-04-02 23:35:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13937 states, 9764 states have (on average 1.4211388775092175) internal successors, (13876), 10138 states have internal predecessors, (13876), 2719 states have call successors, (2719), 1303 states have call predecessors, (2719), 1453 states have return successors, (6655), 2765 states have call predecessors, (6655), 2663 states have call successors, (6655) [2023-04-02 23:35:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13937 states to 13937 states and 23250 transitions. [2023-04-02 23:35:12,211 INFO L78 Accepts]: Start accepts. Automaton has 13937 states and 23250 transitions. Word has length 152 [2023-04-02 23:35:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:12,211 INFO L495 AbstractCegarLoop]: Abstraction has 13937 states and 23250 transitions. [2023-04-02 23:35:12,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:35:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 13937 states and 23250 transitions. [2023-04-02 23:35:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-02 23:35:12,220 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:12,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:12,232 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 23:35:12,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 23:35:12,430 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:12,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1941826302, now seen corresponding path program 1 times [2023-04-02 23:35:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:12,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129383907] [2023-04-02 23:35:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:12,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:35:12,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:12,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129383907] [2023-04-02 23:35:12,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129383907] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:12,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125721693] [2023-04-02 23:35:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:12,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:12,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:12,796 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 23:35:12,799 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 23:35:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:13,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:35:13,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 23:35:13,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:13,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125721693] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:13,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:13,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-04-02 23:35:13,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385831735] [2023-04-02 23:35:13,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:13,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:35:13,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:13,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:35:13,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:35:13,350 INFO L87 Difference]: Start difference. First operand 13937 states and 23250 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:35:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:14,772 INFO L93 Difference]: Finished difference Result 32495 states and 57676 transitions. [2023-04-02 23:35:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:35:14,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 153 [2023-04-02 23:35:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:14,923 INFO L225 Difference]: With dead ends: 32495 [2023-04-02 23:35:14,923 INFO L226 Difference]: Without dead ends: 19927 [2023-04-02 23:35:15,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:35:15,040 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 689 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:15,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 2294 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 23:35:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19927 states. [2023-04-02 23:35:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19927 to 19448. [2023-04-02 23:35:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19448 states, 13560 states have (on average 1.4207227138643068) internal successors, (19265), 14087 states have internal predecessors, (19265), 3843 states have call successors, (3843), 1849 states have call predecessors, (3843), 2044 states have return successors, (11190), 3901 states have call predecessors, (11190), 3763 states have call successors, (11190) [2023-04-02 23:35:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19448 states to 19448 states and 34298 transitions. [2023-04-02 23:35:16,736 INFO L78 Accepts]: Start accepts. Automaton has 19448 states and 34298 transitions. Word has length 153 [2023-04-02 23:35:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:16,737 INFO L495 AbstractCegarLoop]: Abstraction has 19448 states and 34298 transitions. [2023-04-02 23:35:16,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:35:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 19448 states and 34298 transitions. [2023-04-02 23:35:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-02 23:35:16,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:16,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:16,754 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 23:35:16,952 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,SelfDestructingSolverStorable17 [2023-04-02 23:35:16,952 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:16,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:16,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1542223146, now seen corresponding path program 1 times [2023-04-02 23:35:16,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:16,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46307798] [2023-04-02 23:35:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:16,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:35:17,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:17,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46307798] [2023-04-02 23:35:17,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46307798] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:17,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235872829] [2023-04-02 23:35:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:17,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:17,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:17,488 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 23:35:17,491 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 23:35:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:17,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:35:18,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 23:35:18,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:35:18,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235872829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:35:18,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:18,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-04-02 23:35:18,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534313918] [2023-04-02 23:35:18,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:35:18,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:35:18,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:18,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:35:18,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:35:18,053 INFO L87 Difference]: Start difference. First operand 19448 states and 34298 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:35:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:19,817 INFO L93 Difference]: Finished difference Result 42798 states and 78657 transitions. [2023-04-02 23:35:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:35:19,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 155 [2023-04-02 23:35:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:20,152 INFO L225 Difference]: With dead ends: 42798 [2023-04-02 23:35:20,153 INFO L226 Difference]: Without dead ends: 24726 [2023-04-02 23:35:20,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:35:20,271 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 708 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:20,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 2212 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 23:35:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24726 states. [2023-04-02 23:35:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24726 to 23848. [2023-04-02 23:35:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23848 states, 16427 states have (on average 1.4207706824131003) internal successors, (23339), 17097 states have internal predecessors, (23339), 4873 states have call successors, (4873), 2329 states have call predecessors, (4873), 2547 states have return successors, (15275), 4931 states have call predecessors, (15275), 4775 states have call successors, (15275) [2023-04-02 23:35:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23848 states to 23848 states and 43487 transitions. [2023-04-02 23:35:22,020 INFO L78 Accepts]: Start accepts. Automaton has 23848 states and 43487 transitions. Word has length 155 [2023-04-02 23:35:22,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:22,021 INFO L495 AbstractCegarLoop]: Abstraction has 23848 states and 43487 transitions. [2023-04-02 23:35:22,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:35:22,021 INFO L276 IsEmpty]: Start isEmpty. Operand 23848 states and 43487 transitions. [2023-04-02 23:35:22,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-02 23:35:22,025 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:22,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:22,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-02 23:35:22,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:22,235 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:22,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2096547441, now seen corresponding path program 1 times [2023-04-02 23:35:22,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:22,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632929171] [2023-04-02 23:35:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:22,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 23:35:22,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:22,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632929171] [2023-04-02 23:35:22,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632929171] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:22,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918360831] [2023-04-02 23:35:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:22,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:22,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:22,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:22,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 23:35:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:22,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 2676 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:35:22,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 23:35:22,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:35:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:35:23,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918360831] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:35:23,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533523319] [2023-04-02 23:35:23,233 INFO L159 IcfgInterpreter]: Started Sifa with 137 locations of interest [2023-04-02 23:35:23,233 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:35:23,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:35:23,241 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:35:23,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:35:25,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 172 for LOIs [2023-04-02 23:35:26,112 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 223 for LOIs [2023-04-02 23:35:28,451 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 223 for LOIs [2023-04-02 23:35:28,916 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 223 for LOIs [2023-04-02 23:35:32,286 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...