/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:50:02,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:50:02,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:50:02,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:50:02,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:50:02,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:50:02,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:50:02,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:50:02,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:50:02,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:50:02,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:50:02,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:50:02,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:50:02,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:50:02,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:50:02,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:50:02,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:50:02,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:50:02,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:50:02,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:50:02,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:50:02,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:50:02,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:50:02,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:50:02,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:50:02,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:50:02,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:50:02,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:50:02,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:50:02,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:50:02,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:50:02,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:50:02,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:50:02,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:50:02,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:50:02,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:50:02,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:50:02,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:50:02,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:50:02,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:50:02,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:50:02,793 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 23:50:02,818 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:50:02,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:50:02,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:50:02,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:50:02,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:50:02,820 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:50:02,820 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:50:02,820 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:50:02,820 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:50:02,820 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:50:02,821 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:50:02,821 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:50:02,821 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:50:02,821 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:50:02,821 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:50:02,821 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:50:02,821 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:50:02,821 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:50:02,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:50:02,822 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:50:02,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:50:02,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:50:02,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:50:02,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:50:02,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:50:02,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:50:02,823 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:50:02,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:50:02,823 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:50:02,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:50:02,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:50:02,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:50:02,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:50:02,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:50:02,823 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:50:02,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:50:02,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:50:02,824 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:50:02,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:50:02,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:50:02,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:50:02,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:50:03,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:50:03,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:50:03,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:50:03,038 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:50:03,038 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:50:03,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2023-04-02 23:50:03,997 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:50:04,293 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:50:04,293 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2023-04-02 23:50:04,311 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcdb20cc4/b6088897e1b3459f8eb2c86cb8705379/FLAG1394b1766 [2023-04-02 23:50:04,320 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcdb20cc4/b6088897e1b3459f8eb2c86cb8705379 [2023-04-02 23:50:04,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:50:04,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:50:04,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:50:04,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:50:04,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:50:04,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48146d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04, skipping insertion in model container [2023-04-02 23:50:04,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:50:04,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:50:04,720 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2023-04-02 23:50:04,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:50:04,769 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:50:04,846 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2023-04-02 23:50:04,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:50:04,871 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:50:04,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04 WrapperNode [2023-04-02 23:50:04,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:50:04,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:50:04,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:50:04,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:50:04,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,949 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:50:04,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:50:04,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:50:04,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:50:04,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (1/1) ... [2023-04-02 23:50:04,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:50:04,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:05,006 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 23:50:05,014 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 23:50:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:50:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:50:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:50:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:50:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:50:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:50:05,039 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:50:05,039 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:50:05,039 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:50:05,039 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:50:05,039 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:50:05,039 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:50:05,039 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:50:05,039 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:50:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:50:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:50:05,042 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:50:05,042 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:50:05,042 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:50:05,043 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:50:05,043 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-02 23:50:05,043 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:50:05,043 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:50:05,044 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:50:05,044 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:50:05,044 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:50:05,044 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:50:05,044 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:50:05,044 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:50:05,044 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:50:05,045 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:50:05,045 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:50:05,045 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:50:05,045 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:50:05,045 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:50:05,046 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:50:05,047 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:50:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:50:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:50:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:50:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:50:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:50:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:50:05,050 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:50:05,051 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:50:05,051 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:50:05,051 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:50:05,051 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:50:05,051 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:50:05,051 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:50:05,051 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:50:05,052 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:50:05,052 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:50:05,052 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:50:05,053 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:50:05,053 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:50:05,055 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:50:05,055 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:50:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:50:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:50:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:50:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:50:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:50:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:50:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:50:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:50:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:50:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:50:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:50:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:50:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:50:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:50:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:50:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:50:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:50:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:50:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:50:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:50:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:50:05,063 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:50:05,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:50:05,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:50:05,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:50:05,277 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:50:05,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:50:06,464 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:50:07,009 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:50:07,009 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:50:07,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:50:07 BoogieIcfgContainer [2023-04-02 23:50:07,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:50:07,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:50:07,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:50:07,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:50:07,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:50:04" (1/3) ... [2023-04-02 23:50:07,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73071758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:50:07, skipping insertion in model container [2023-04-02 23:50:07,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:04" (2/3) ... [2023-04-02 23:50:07,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73071758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:50:07, skipping insertion in model container [2023-04-02 23:50:07,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:50:07" (3/3) ... [2023-04-02 23:50:07,017 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product31.cil.c [2023-04-02 23:50:07,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:50:07,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:50:07,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:50:07,072 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;@30075257, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:50:07,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:50:07,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 601 states, 351 states have (on average 1.4729344729344729) internal successors, (517), 378 states have internal predecessors, (517), 182 states have call successors, (182), 55 states have call predecessors, (182), 55 states have return successors, (182), 173 states have call predecessors, (182), 182 states have call successors, (182) [2023-04-02 23:50:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:50:07,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:07,093 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:50:07,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:07,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:07,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1661666419, now seen corresponding path program 1 times [2023-04-02 23:50:07,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:07,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450752881] [2023-04-02 23:50:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:07,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:50:07,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:07,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450752881] [2023-04-02 23:50:07,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450752881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:07,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:07,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:50:07,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433051706] [2023-04-02 23:50:07,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:07,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:50:07,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:07,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:50:07,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:50:07,573 INFO L87 Difference]: Start difference. First operand has 601 states, 351 states have (on average 1.4729344729344729) internal successors, (517), 378 states have internal predecessors, (517), 182 states have call successors, (182), 55 states have call predecessors, (182), 55 states have return successors, (182), 173 states have call predecessors, (182), 182 states have call successors, (182) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2023-04-02 23:50:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:07,708 INFO L93 Difference]: Finished difference Result 504 states and 742 transitions. [2023-04-02 23:50:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:50:07,710 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 112 [2023-04-02 23:50:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:07,726 INFO L225 Difference]: With dead ends: 504 [2023-04-02 23:50:07,726 INFO L226 Difference]: Without dead ends: 470 [2023-04-02 23:50:07,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:50:07,735 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:07,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 660 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:50:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-04-02 23:50:07,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2023-04-02 23:50:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 295 states have (on average 1.5084745762711864) internal successors, (445), 314 states have internal predecessors, (445), 127 states have call successors, (127), 51 states have call predecessors, (127), 47 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2023-04-02 23:50:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 691 transitions. [2023-04-02 23:50:07,801 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 691 transitions. Word has length 112 [2023-04-02 23:50:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:07,803 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 691 transitions. [2023-04-02 23:50:07,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2023-04-02 23:50:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 691 transitions. [2023-04-02 23:50:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-02 23:50:07,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:07,811 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:50:07,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:50:07,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:07,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash 20975429, now seen corresponding path program 1 times [2023-04-02 23:50:07,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:07,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981761647] [2023-04-02 23:50:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:07,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:50:08,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:08,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981761647] [2023-04-02 23:50:08,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981761647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:08,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:08,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:50:08,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645816925] [2023-04-02 23:50:08,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:08,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:50:08,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:50:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:08,434 INFO L87 Difference]: Start difference. First operand 470 states and 691 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:50:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:10,506 INFO L93 Difference]: Finished difference Result 1337 states and 2010 transitions. [2023-04-02 23:50:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:50:10,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 113 [2023-04-02 23:50:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:10,514 INFO L225 Difference]: With dead ends: 1337 [2023-04-02 23:50:10,514 INFO L226 Difference]: Without dead ends: 909 [2023-04-02 23:50:10,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:50:10,522 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1292 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 3495 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 3975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 3495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:10,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1389 Valid, 502 Invalid, 3975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 3495 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 23:50:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2023-04-02 23:50:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 884. [2023-04-02 23:50:10,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 567 states have (on average 1.5220458553791887) internal successors, (863), 600 states have internal predecessors, (863), 232 states have call successors, (232), 87 states have call predecessors, (232), 84 states have return successors, (230), 220 states have call predecessors, (230), 224 states have call successors, (230) [2023-04-02 23:50:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1325 transitions. [2023-04-02 23:50:10,583 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1325 transitions. Word has length 113 [2023-04-02 23:50:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:10,584 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1325 transitions. [2023-04-02 23:50:10,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:50:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1325 transitions. [2023-04-02 23:50:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-02 23:50:10,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:10,590 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:50:10,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:50:10,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:10,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash 595792193, now seen corresponding path program 1 times [2023-04-02 23:50:10,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:10,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442145410] [2023-04-02 23:50:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:10,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:50:10,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:10,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442145410] [2023-04-02 23:50:10,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442145410] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:10,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:10,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:50:10,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32431586] [2023-04-02 23:50:10,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:10,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:50:10,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:50:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:50:10,889 INFO L87 Difference]: Start difference. First operand 884 states and 1325 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:50:11,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:11,415 INFO L93 Difference]: Finished difference Result 923 states and 1381 transitions. [2023-04-02 23:50:11,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:11,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2023-04-02 23:50:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:11,424 INFO L225 Difference]: With dead ends: 923 [2023-04-02 23:50:11,424 INFO L226 Difference]: Without dead ends: 906 [2023-04-02 23:50:11,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:50:11,429 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 708 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:11,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 2102 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 23:50:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-04-02 23:50:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 888. [2023-04-02 23:50:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 571 states have (on average 1.5183887915936953) internal successors, (867), 604 states have internal predecessors, (867), 232 states have call successors, (232), 87 states have call predecessors, (232), 84 states have return successors, (230), 220 states have call predecessors, (230), 224 states have call successors, (230) [2023-04-02 23:50:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1329 transitions. [2023-04-02 23:50:11,471 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1329 transitions. Word has length 117 [2023-04-02 23:50:11,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:11,472 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1329 transitions. [2023-04-02 23:50:11,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:50:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1329 transitions. [2023-04-02 23:50:11,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 23:50:11,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:11,474 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:50:11,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:50:11,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:11,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:11,475 INFO L85 PathProgramCache]: Analyzing trace with hash 5471587, now seen corresponding path program 1 times [2023-04-02 23:50:11,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:11,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615578921] [2023-04-02 23:50:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:11,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:50:11,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:11,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615578921] [2023-04-02 23:50:11,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615578921] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:11,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:11,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:50:11,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195864729] [2023-04-02 23:50:11,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:11,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:50:11,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:11,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:50:11,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:50:11,757 INFO L87 Difference]: Start difference. First operand 888 states and 1329 transitions. Second operand has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-04-02 23:50:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:11,919 INFO L93 Difference]: Finished difference Result 909 states and 1355 transitions. [2023-04-02 23:50:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:50:11,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) Word has length 122 [2023-04-02 23:50:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:11,923 INFO L225 Difference]: With dead ends: 909 [2023-04-02 23:50:11,923 INFO L226 Difference]: Without dead ends: 892 [2023-04-02 23:50:11,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:50:11,924 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 10 mSDsluCounter, 3881 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4531 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:11,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4531 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:50:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2023-04-02 23:50:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 888. [2023-04-02 23:50:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 571 states have (on average 1.5148861646234677) internal successors, (865), 604 states have internal predecessors, (865), 232 states have call successors, (232), 87 states have call predecessors, (232), 84 states have return successors, (230), 220 states have call predecessors, (230), 224 states have call successors, (230) [2023-04-02 23:50:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1327 transitions. [2023-04-02 23:50:11,954 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1327 transitions. Word has length 122 [2023-04-02 23:50:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:11,954 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1327 transitions. [2023-04-02 23:50:11,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-04-02 23:50:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1327 transitions. [2023-04-02 23:50:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 23:50:11,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:11,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 23:50:11,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:50:11,957 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:11,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:11,957 INFO L85 PathProgramCache]: Analyzing trace with hash -461432393, now seen corresponding path program 1 times [2023-04-02 23:50:11,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:11,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686533412] [2023-04-02 23:50:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:11,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:12,199 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 23:50:12,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:12,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686533412] [2023-04-02 23:50:12,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686533412] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:12,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:12,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399843790] [2023-04-02 23:50:12,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:12,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:12,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:12,201 INFO L87 Difference]: Start difference. First operand 888 states and 1327 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:13,369 INFO L93 Difference]: Finished difference Result 2646 states and 4050 transitions. [2023-04-02 23:50:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:13,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 137 [2023-04-02 23:50:13,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:13,383 INFO L225 Difference]: With dead ends: 2646 [2023-04-02 23:50:13,383 INFO L226 Difference]: Without dead ends: 1800 [2023-04-02 23:50:13,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:13,390 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1294 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:13,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1380 Valid, 507 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 23:50:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2023-04-02 23:50:13,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1702. [2023-04-02 23:50:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1116 states have (on average 1.528673835125448) internal successors, (1706), 1180 states have internal predecessors, (1706), 428 states have call successors, (428), 151 states have call predecessors, (428), 157 states have return successors, (457), 404 states have call predecessors, (457), 419 states have call successors, (457) [2023-04-02 23:50:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2591 transitions. [2023-04-02 23:50:13,522 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2591 transitions. Word has length 137 [2023-04-02 23:50:13,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:13,523 INFO L495 AbstractCegarLoop]: Abstraction has 1702 states and 2591 transitions. [2023-04-02 23:50:13,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2591 transitions. [2023-04-02 23:50:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 23:50:13,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:13,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:13,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:50:13,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:13,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:13,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1420983847, now seen corresponding path program 1 times [2023-04-02 23:50:13,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:13,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695351387] [2023-04-02 23:50:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:13,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:13,758 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 23:50:13,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:13,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695351387] [2023-04-02 23:50:13,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695351387] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:13,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:13,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:13,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497830690] [2023-04-02 23:50:13,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:13,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:13,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:13,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:13,760 INFO L87 Difference]: Start difference. First operand 1702 states and 2591 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:15,039 INFO L93 Difference]: Finished difference Result 5033 states and 7820 transitions. [2023-04-02 23:50:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:15,040 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), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 138 [2023-04-02 23:50:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:15,056 INFO L225 Difference]: With dead ends: 5033 [2023-04-02 23:50:15,056 INFO L226 Difference]: Without dead ends: 3376 [2023-04-02 23:50:15,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:15,063 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1291 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:15,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1377 Valid, 512 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 23:50:15,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2023-04-02 23:50:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 3255. [2023-04-02 23:50:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2164 states have (on average 1.5355822550831792) internal successors, (3323), 2292 states have internal predecessors, (3323), 786 states have call successors, (786), 279 states have call predecessors, (786), 304 states have return successors, (911), 741 states have call predecessors, (911), 775 states have call successors, (911) [2023-04-02 23:50:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 5020 transitions. [2023-04-02 23:50:15,215 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 5020 transitions. Word has length 138 [2023-04-02 23:50:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:15,216 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 5020 transitions. [2023-04-02 23:50:15,216 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), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 5020 transitions. [2023-04-02 23:50:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-02 23:50:15,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:15,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 23:50:15,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:50:15,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:15,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:15,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1102303943, now seen corresponding path program 1 times [2023-04-02 23:50:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:15,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785166774] [2023-04-02 23:50:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:15,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:15,483 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 23:50:15,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:15,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785166774] [2023-04-02 23:50:15,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785166774] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:15,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:15,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:15,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287504663] [2023-04-02 23:50:15,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:15,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:15,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:15,485 INFO L87 Difference]: Start difference. First operand 3255 states and 5020 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:16,838 INFO L93 Difference]: Finished difference Result 9740 states and 15436 transitions. [2023-04-02 23:50:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:16,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 139 [2023-04-02 23:50:16,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:16,870 INFO L225 Difference]: With dead ends: 9740 [2023-04-02 23:50:16,871 INFO L226 Difference]: Without dead ends: 6536 [2023-04-02 23:50:16,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:16,885 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1288 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:16,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1374 Valid, 517 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 23:50:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6536 states. [2023-04-02 23:50:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6536 to 6370. [2023-04-02 23:50:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 4263 states have (on average 1.537180389397138) internal successors, (6553), 4523 states have internal predecessors, (6553), 1498 states have call successors, (1498), 535 states have call predecessors, (1498), 608 states have return successors, (1943), 1417 states have call predecessors, (1943), 1483 states have call successors, (1943) [2023-04-02 23:50:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 9994 transitions. [2023-04-02 23:50:17,314 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 9994 transitions. Word has length 139 [2023-04-02 23:50:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:17,314 INFO L495 AbstractCegarLoop]: Abstraction has 6370 states and 9994 transitions. [2023-04-02 23:50:17,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 9994 transitions. [2023-04-02 23:50:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-02 23:50:17,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:17,317 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:17,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:50:17,317 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:17,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:17,317 INFO L85 PathProgramCache]: Analyzing trace with hash 186842395, now seen corresponding path program 1 times [2023-04-02 23:50:17,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:17,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144419805] [2023-04-02 23:50:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:17,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:17,518 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 23:50:17,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:17,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144419805] [2023-04-02 23:50:17,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144419805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:17,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:17,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:17,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15016338] [2023-04-02 23:50:17,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:17,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:17,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:17,520 INFO L87 Difference]: Start difference. First operand 6370 states and 9994 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:19,186 INFO L93 Difference]: Finished difference Result 19179 states and 31399 transitions. [2023-04-02 23:50:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 140 [2023-04-02 23:50:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:19,258 INFO L225 Difference]: With dead ends: 19179 [2023-04-02 23:50:19,258 INFO L226 Difference]: Without dead ends: 12872 [2023-04-02 23:50:19,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:19,287 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1285 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:19,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1371 Valid, 522 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 23:50:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12872 states. [2023-04-02 23:50:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12872 to 12617. [2023-04-02 23:50:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12617 states, 8466 states have (on average 1.5359083392393102) internal successors, (13003), 8998 states have internal predecessors, (13003), 2914 states have call successors, (2914), 1047 states have call predecessors, (2914), 1236 states have return successors, (4435), 2773 states have call predecessors, (4435), 2891 states have call successors, (4435) [2023-04-02 23:50:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 20352 transitions. [2023-04-02 23:50:20,143 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 20352 transitions. Word has length 140 [2023-04-02 23:50:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:20,144 INFO L495 AbstractCegarLoop]: Abstraction has 12617 states and 20352 transitions. [2023-04-02 23:50:20,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 20352 transitions. [2023-04-02 23:50:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-02 23:50:20,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:20,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 23:50:20,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:50:20,148 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:20,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1495677115, now seen corresponding path program 1 times [2023-04-02 23:50:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:20,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098163380] [2023-04-02 23:50:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:20,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:20,412 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 23:50:20,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098163380] [2023-04-02 23:50:20,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098163380] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:20,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:20,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446363297] [2023-04-02 23:50:20,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:20,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:20,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:20,414 INFO L87 Difference]: Start difference. First operand 12617 states and 20352 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:22,765 INFO L93 Difference]: Finished difference Result 38134 states and 65967 transitions. [2023-04-02 23:50:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 141 [2023-04-02 23:50:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:22,878 INFO L225 Difference]: With dead ends: 38134 [2023-04-02 23:50:22,879 INFO L226 Difference]: Without dead ends: 25592 [2023-04-02 23:50:22,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:22,929 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1282 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:22,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1368 Valid, 528 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 23:50:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25592 states. [2023-04-02 23:50:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25592 to 25006. [2023-04-02 23:50:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25006 states, 16824 states have (on average 1.5363766048502139) internal successors, (25848), 17886 states have internal predecessors, (25848), 5729 states have call successors, (5729), 2068 states have call predecessors, (5729), 2452 states have return successors, (10392), 5445 states have call predecessors, (10392), 5691 states have call successors, (10392) [2023-04-02 23:50:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25006 states to 25006 states and 41969 transitions. [2023-04-02 23:50:24,758 INFO L78 Accepts]: Start accepts. Automaton has 25006 states and 41969 transitions. Word has length 141 [2023-04-02 23:50:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:24,758 INFO L495 AbstractCegarLoop]: Abstraction has 25006 states and 41969 transitions. [2023-04-02 23:50:24,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:50:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 25006 states and 41969 transitions. [2023-04-02 23:50:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-02 23:50:24,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:24,766 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:24,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:50:24,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:24,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:24,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1141777092, now seen corresponding path program 1 times [2023-04-02 23:50:24,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:24,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877225878] [2023-04-02 23:50:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:24,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 23:50:24,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:24,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877225878] [2023-04-02 23:50:24,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877225878] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:24,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:24,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:50:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118030326] [2023-04-02 23:50:24,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:50:24,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:50:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:24,934 INFO L87 Difference]: Start difference. First operand 25006 states and 41969 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2023-04-02 23:50:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:26,560 INFO L93 Difference]: Finished difference Result 50391 states and 87629 transitions. [2023-04-02 23:50:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:26,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) Word has length 201 [2023-04-02 23:50:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:26,690 INFO L225 Difference]: With dead ends: 50391 [2023-04-02 23:50:26,690 INFO L226 Difference]: Without dead ends: 25428 [2023-04-02 23:50:26,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:26,768 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 10 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:26,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2579 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:50:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25428 states. [2023-04-02 23:50:28,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25428 to 25278. [2023-04-02 23:50:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25278 states, 17016 states have (on average 1.530324400564175) internal successors, (26040), 18078 states have internal predecessors, (26040), 5745 states have call successors, (5745), 2068 states have call predecessors, (5745), 2516 states have return successors, (10699), 5525 states have call predecessors, (10699), 5707 states have call successors, (10699) [2023-04-02 23:50:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25278 states to 25278 states and 42484 transitions. [2023-04-02 23:50:28,437 INFO L78 Accepts]: Start accepts. Automaton has 25278 states and 42484 transitions. Word has length 201 [2023-04-02 23:50:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:28,438 INFO L495 AbstractCegarLoop]: Abstraction has 25278 states and 42484 transitions. [2023-04-02 23:50:28,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2023-04-02 23:50:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 25278 states and 42484 transitions. [2023-04-02 23:50:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-04-02 23:50:28,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:28,447 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:50:28,447 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:28,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1256148491, now seen corresponding path program 1 times [2023-04-02 23:50:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:28,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574526060] [2023-04-02 23:50:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-04-02 23:50:28,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:28,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574526060] [2023-04-02 23:50:28,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574526060] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:28,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470290648] [2023-04-02 23:50:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:28,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:28,891 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 23:50:28,894 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 23:50:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:29,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:50:29,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:50:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 23:50:29,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:50:29,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470290648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:29,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:50:29,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:50:29,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581046755] [2023-04-02 23:50:29,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:29,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:29,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:29,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:29,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:50:29,477 INFO L87 Difference]: Start difference. First operand 25278 states and 42484 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-04-02 23:50:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:31,144 INFO L93 Difference]: Finished difference Result 53009 states and 92656 transitions. [2023-04-02 23:50:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 210 [2023-04-02 23:50:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:31,305 INFO L225 Difference]: With dead ends: 53009 [2023-04-02 23:50:31,305 INFO L226 Difference]: Without dead ends: 27774 [2023-04-02 23:50:31,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:50:31,396 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 213 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:31,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1728 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:50:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27774 states. [2023-04-02 23:50:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27774 to 27774. [2023-04-02 23:50:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27774 states, 19448 states have (on average 1.579185520361991) internal successors, (30712), 20510 states have internal predecessors, (30712), 5745 states have call successors, (5745), 2132 states have call predecessors, (5745), 2580 states have return successors, (10699), 5525 states have call predecessors, (10699), 5707 states have call successors, (10699) [2023-04-02 23:50:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27774 states to 27774 states and 47156 transitions. [2023-04-02 23:50:33,155 INFO L78 Accepts]: Start accepts. Automaton has 27774 states and 47156 transitions. Word has length 210 [2023-04-02 23:50:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:33,156 INFO L495 AbstractCegarLoop]: Abstraction has 27774 states and 47156 transitions. [2023-04-02 23:50:33,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-04-02 23:50:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 27774 states and 47156 transitions. [2023-04-02 23:50:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-04-02 23:50:33,165 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:33,165 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:33,175 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 23:50:33,373 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,SelfDestructingSolverStorable10 [2023-04-02 23:50:33,373 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:33,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 86424785, now seen corresponding path program 1 times [2023-04-02 23:50:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:33,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511129677] [2023-04-02 23:50:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:33,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-02 23:50:33,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511129677] [2023-04-02 23:50:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511129677] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622780974] [2023-04-02 23:50:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:33,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:33,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:33,580 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 23:50:33,607 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 23:50:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:34,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:50:34,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:50:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 23:50:34,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:50:34,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622780974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:34,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:50:34,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:50:34,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145147386] [2023-04-02 23:50:34,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:34,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:34,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:50:34,068 INFO L87 Difference]: Start difference. First operand 27774 states and 47156 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-04-02 23:50:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:35,672 INFO L93 Difference]: Finished difference Result 58001 states and 101934 transitions. [2023-04-02 23:50:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 215 [2023-04-02 23:50:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:35,810 INFO L225 Difference]: With dead ends: 58001 [2023-04-02 23:50:35,810 INFO L226 Difference]: Without dead ends: 30270 [2023-04-02 23:50:35,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:35,888 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 211 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:35,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1728 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:50:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30270 states. [2023-04-02 23:50:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30270 to 30270. [2023-04-02 23:50:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30270 states, 21880 states have (on average 1.6171846435100548) internal successors, (35384), 22942 states have internal predecessors, (35384), 5745 states have call successors, (5745), 2196 states have call predecessors, (5745), 2644 states have return successors, (10699), 5525 states have call predecessors, (10699), 5707 states have call successors, (10699) [2023-04-02 23:50:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30270 states to 30270 states and 51828 transitions. [2023-04-02 23:50:37,638 INFO L78 Accepts]: Start accepts. Automaton has 30270 states and 51828 transitions. Word has length 215 [2023-04-02 23:50:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:37,639 INFO L495 AbstractCegarLoop]: Abstraction has 30270 states and 51828 transitions. [2023-04-02 23:50:37,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-04-02 23:50:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 30270 states and 51828 transitions. [2023-04-02 23:50:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-02 23:50:37,648 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:37,648 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:37,657 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 23:50:37,857 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,SelfDestructingSolverStorable11 [2023-04-02 23:50:37,857 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:37,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:37,858 INFO L85 PathProgramCache]: Analyzing trace with hash 987612577, now seen corresponding path program 1 times [2023-04-02 23:50:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:37,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578375557] [2023-04-02 23:50:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-02 23:50:38,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:38,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578375557] [2023-04-02 23:50:38,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578375557] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:38,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092527486] [2023-04-02 23:50:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:38,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:38,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:38,111 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 23:50:38,112 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 23:50:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:38,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:50:38,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:50:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 23:50:38,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:50:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092527486] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:38,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:50:38,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:50:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430083705] [2023-04-02 23:50:38,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:38,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:38,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:50:38,606 INFO L87 Difference]: Start difference. First operand 30270 states and 51828 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-04-02 23:50:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:40,276 INFO L93 Difference]: Finished difference Result 62993 states and 111212 transitions. [2023-04-02 23:50:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:40,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 219 [2023-04-02 23:50:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:40,412 INFO L225 Difference]: With dead ends: 62993 [2023-04-02 23:50:40,412 INFO L226 Difference]: Without dead ends: 32766 [2023-04-02 23:50:40,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:40,478 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 209 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:40,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1728 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:50:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32766 states. [2023-04-02 23:50:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32766 to 32766. [2023-04-02 23:50:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32766 states, 24312 states have (on average 1.6475814412635736) internal successors, (40056), 25374 states have internal predecessors, (40056), 5745 states have call successors, (5745), 2260 states have call predecessors, (5745), 2708 states have return successors, (10699), 5525 states have call predecessors, (10699), 5707 states have call successors, (10699) [2023-04-02 23:50:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32766 states to 32766 states and 56500 transitions. [2023-04-02 23:50:42,062 INFO L78 Accepts]: Start accepts. Automaton has 32766 states and 56500 transitions. Word has length 219 [2023-04-02 23:50:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:42,062 INFO L495 AbstractCegarLoop]: Abstraction has 32766 states and 56500 transitions. [2023-04-02 23:50:42,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-04-02 23:50:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 32766 states and 56500 transitions. [2023-04-02 23:50:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-04-02 23:50:42,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:42,078 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:42,093 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 23:50:42,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:42,287 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:42,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1837947843, now seen corresponding path program 1 times [2023-04-02 23:50:42,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:42,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256090693] [2023-04-02 23:50:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:42,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-04-02 23:50:42,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:42,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256090693] [2023-04-02 23:50:42,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256090693] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:42,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578642130] [2023-04-02 23:50:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:42,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:42,491 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 23:50:42,493 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 23:50:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:42,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:50:42,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:50:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-02 23:50:42,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:50:42,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578642130] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:42,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:50:42,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:50:42,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710696404] [2023-04-02 23:50:42,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:42,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:42,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:42,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:42,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:50:42,983 INFO L87 Difference]: Start difference. First operand 32766 states and 56500 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-04-02 23:50:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:44,678 INFO L93 Difference]: Finished difference Result 67985 states and 120490 transitions. [2023-04-02 23:50:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 222 [2023-04-02 23:50:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:44,818 INFO L225 Difference]: With dead ends: 67985 [2023-04-02 23:50:44,818 INFO L226 Difference]: Without dead ends: 35262 [2023-04-02 23:50:44,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:44,888 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 207 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:44,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1728 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:50:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2023-04-02 23:50:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 35262. [2023-04-02 23:50:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35262 states, 26744 states have (on average 1.6724498953036195) internal successors, (44728), 27806 states have internal predecessors, (44728), 5745 states have call successors, (5745), 2324 states have call predecessors, (5745), 2772 states have return successors, (10699), 5525 states have call predecessors, (10699), 5707 states have call successors, (10699) [2023-04-02 23:50:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35262 states to 35262 states and 61172 transitions. [2023-04-02 23:50:46,595 INFO L78 Accepts]: Start accepts. Automaton has 35262 states and 61172 transitions. Word has length 222 [2023-04-02 23:50:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:46,595 INFO L495 AbstractCegarLoop]: Abstraction has 35262 states and 61172 transitions. [2023-04-02 23:50:46,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-04-02 23:50:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 35262 states and 61172 transitions. [2023-04-02 23:50:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-04-02 23:50:46,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:46,604 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:46,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 23:50:46,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:46,813 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:46,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:46,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1256861995, now seen corresponding path program 1 times [2023-04-02 23:50:46,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:46,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883400683] [2023-04-02 23:50:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-04-02 23:50:47,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:47,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883400683] [2023-04-02 23:50:47,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883400683] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:47,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17940127] [2023-04-02 23:50:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:47,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:47,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:47,249 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 23:50:47,251 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 23:50:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:47,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 23:50:47,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:50:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-02 23:50:48,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:50:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 23:50:49,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17940127] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:49,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:50:49,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 20 [2023-04-02 23:50:49,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841907599] [2023-04-02 23:50:49,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:49,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:50:49,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:49,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:50:49,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-04-02 23:50:49,562 INFO L87 Difference]: Start difference. First operand 35262 states and 61172 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (46), 4 states have call predecessors, (46), 4 states have return successors, (42), 6 states have call predecessors, (42), 5 states have call successors, (42) [2023-04-02 23:50:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:56,820 INFO L93 Difference]: Finished difference Result 110537 states and 198787 transitions. [2023-04-02 23:50:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:50:56,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (46), 4 states have call predecessors, (46), 4 states have return successors, (42), 6 states have call predecessors, (42), 5 states have call successors, (42) Word has length 224 [2023-04-02 23:50:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:57,144 INFO L225 Difference]: With dead ends: 110537 [2023-04-02 23:50:57,145 INFO L226 Difference]: Without dead ends: 75317 [2023-04-02 23:50:57,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2023-04-02 23:50:57,221 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 2333 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 2610 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 2610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:57,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2459 Valid, 1543 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 2610 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-02 23:50:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75317 states. [2023-04-02 23:51:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75317 to 74390. [2023-04-02 23:51:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74390 states, 55939 states have (on average 1.675164017948122) internal successors, (93707), 58436 states have internal predecessors, (93707), 12840 states have call successors, (12840), 4607 states have call predecessors, (12840), 5610 states have return successors, (28662), 12006 states have call predecessors, (28662), 12802 states have call successors, (28662) [2023-04-02 23:51:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74390 states to 74390 states and 135209 transitions. [2023-04-02 23:51:03,163 INFO L78 Accepts]: Start accepts. Automaton has 74390 states and 135209 transitions. Word has length 224 [2023-04-02 23:51:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:03,163 INFO L495 AbstractCegarLoop]: Abstraction has 74390 states and 135209 transitions. [2023-04-02 23:51:03,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (46), 4 states have call predecessors, (46), 4 states have return successors, (42), 6 states have call predecessors, (42), 5 states have call successors, (42) [2023-04-02 23:51:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 74390 states and 135209 transitions. [2023-04-02 23:51:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-04-02 23:51:03,177 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:03,177 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:03,186 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 23:51:03,385 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,SelfDestructingSolverStorable14 [2023-04-02 23:51:03,386 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:03,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1973600486, now seen corresponding path program 1 times [2023-04-02 23:51:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894358691] [2023-04-02 23:51:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-02 23:51:03,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:03,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894358691] [2023-04-02 23:51:03,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894358691] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:03,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245863137] [2023-04-02 23:51:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:03,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:03,882 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 23:51:03,884 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 23:51:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:04,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 3357 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 23:51:04,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:51:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-02 23:51:04,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:51:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-02 23:51:05,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245863137] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:51:05,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638265256] [2023-04-02 23:51:05,838 INFO L159 IcfgInterpreter]: Started Sifa with 211 locations of interest [2023-04-02 23:51:05,838 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:51:05,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:51:05,844 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:51:05,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:51:07,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 187 for LOIs [2023-04-02 23:51:08,376 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 242 for LOIs [2023-04-02 23:51:10,753 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 242 for LOIs [2023-04-02 23:51:14,476 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...