/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:32:28,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:32:28,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:32:28,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:32:28,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:32:28,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:32:28,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:32:28,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:32:28,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:32:28,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:32:28,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:32:28,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:32:28,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:32:28,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:32:28,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:32:28,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:32:28,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:32:28,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:32:28,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:32:28,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:32:28,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:32:28,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:32:28,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:32:28,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:32:28,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:32:28,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:32:28,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:32:28,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:32:28,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:32:28,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:32:28,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:32:28,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:32:28,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:32:28,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:32:28,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:32:28,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:32:28,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:32:28,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:32:28,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:32:28,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:32:28,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:32:28,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:32:28,482 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:32:28,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:32:28,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:32:28,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:32:28,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:32:28,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:32:28,483 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:32:28,483 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:32:28,483 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:32:28,483 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:32:28,483 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:32:28,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:32:28,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:32:28,484 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:32:28,484 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:32:28,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:32:28,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:32:28,484 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:32:28,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:32:28,484 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:32:28,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:32:28,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:32:28,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:32:28,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:32:28,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:32:28,486 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:32:28,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:32:28,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:32:28,486 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:32:28,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:32:28,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:32:28,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:32:28,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:32:28,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:32:28,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:32:28,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:32:28,695 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:32:28,696 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:32:28,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2023-04-01 05:32:29,829 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:32:30,120 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:32:30,121 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2023-04-01 05:32:30,141 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3cade357/23efdba711eb464a8a04e8f426b3d1b5/FLAG67c9fcda9 [2023-04-01 05:32:30,153 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3cade357/23efdba711eb464a8a04e8f426b3d1b5 [2023-04-01 05:32:30,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:32:30,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:32:30,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:32:30,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:32:30,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:32:30,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e1026e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30, skipping insertion in model container [2023-04-01 05:32:30,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:32:30,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:32:30,496 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2023-04-01 05:32:30,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:32:30,533 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:32:30,638 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2023-04-01 05:32:30,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:32:30,679 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:32:30,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30 WrapperNode [2023-04-01 05:32:30,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:32:30,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:32:30,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:32:30,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:32:30,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,792 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:32:30,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:32:30,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:32:30,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:32:30,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (1/1) ... [2023-04-01 05:32:30,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:32:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:30,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:32:30,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:32:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:32:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:32:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:32:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:32:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 05:32:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 05:32:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 05:32:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 05:32:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 05:32:30,882 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 05:32:30,883 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 05:32:30,884 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:32:30,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:32:30,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:32:30,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:32:30,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 05:32:30,886 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 05:32:30,887 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 05:32:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-01 05:32:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:32:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:32:30,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:32:30,891 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:32:30,891 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:32:30,891 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:32:30,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:32:30,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:32:30,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:32:31,050 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:32:31,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:32:31,922 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:32:32,509 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:32:32,510 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 05:32:32,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:32:32 BoogieIcfgContainer [2023-04-01 05:32:32,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:32:32,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:32:32,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:32:32,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:32:32,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:32:30" (1/3) ... [2023-04-01 05:32:32,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e43fa6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:32:32, skipping insertion in model container [2023-04-01 05:32:32,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:32:30" (2/3) ... [2023-04-01 05:32:32,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e43fa6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:32:32, skipping insertion in model container [2023-04-01 05:32:32,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:32:32" (3/3) ... [2023-04-01 05:32:32,520 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2023-04-01 05:32:32,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:32:32,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:32:32,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:32:32,587 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;@1907c979, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:32:32,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:32:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 587 states, 353 states have (on average 1.5127478753541077) internal successors, (534), 377 states have internal predecessors, (534), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) [2023-04-01 05:32:32,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-01 05:32:32,617 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:32,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:32,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:32,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash -302144199, now seen corresponding path program 1 times [2023-04-01 05:32:32,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:32,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890810179] [2023-04-01 05:32:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:32,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 05:32:33,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:33,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890810179] [2023-04-01 05:32:33,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890810179] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:33,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478615764] [2023-04-01 05:32:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:33,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:33,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:33,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:32:33,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:32:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:33,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 05:32:33,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 05:32:33,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:33,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478615764] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:33,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:33,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-04-01 05:32:33,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589546456] [2023-04-01 05:32:33,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:33,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:32:33,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:32:33,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:32:33,617 INFO L87 Difference]: Start difference. First operand has 587 states, 353 states have (on average 1.5127478753541077) internal successors, (534), 377 states have internal predecessors, (534), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-01 05:32:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:33,746 INFO L93 Difference]: Finished difference Result 924 states and 1414 transitions. [2023-04-01 05:32:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:32:33,750 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 127 [2023-04-01 05:32:33,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:33,761 INFO L225 Difference]: With dead ends: 924 [2023-04-01 05:32:33,761 INFO L226 Difference]: Without dead ends: 470 [2023-04-01 05:32:33,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:32:33,772 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:33,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 680 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:32:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-04-01 05:32:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2023-04-01 05:32:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 303 states have (on average 1.528052805280528) internal successors, (463), 319 states have internal predecessors, (463), 123 states have call successors, (123), 48 states have call predecessors, (123), 43 states have return successors, (117), 114 states have call predecessors, (117), 117 states have call successors, (117) [2023-04-01 05:32:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 703 transitions. [2023-04-01 05:32:33,881 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 703 transitions. Word has length 127 [2023-04-01 05:32:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:33,882 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 703 transitions. [2023-04-01 05:32:33,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-01 05:32:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 703 transitions. [2023-04-01 05:32:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-01 05:32:33,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:33,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:33,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:32:34,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 05:32:34,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:34,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:34,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1016180089, now seen corresponding path program 1 times [2023-04-01 05:32:34,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:34,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832333858] [2023-04-01 05:32:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:34,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:34,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832333858] [2023-04-01 05:32:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832333858] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:34,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:32:34,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:32:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754870807] [2023-04-01 05:32:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:34,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:32:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:32:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:34,794 INFO L87 Difference]: Start difference. First operand 470 states and 703 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 05:32:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:35,125 INFO L93 Difference]: Finished difference Result 1345 states and 2049 transitions. [2023-04-01 05:32:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 05:32:35,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 127 [2023-04-01 05:32:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:35,135 INFO L225 Difference]: With dead ends: 1345 [2023-04-01 05:32:35,135 INFO L226 Difference]: Without dead ends: 912 [2023-04-01 05:32:35,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-04-01 05:32:35,139 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 1064 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 4527 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:35,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 4527 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:32:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-04-01 05:32:35,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 896. [2023-04-01 05:32:35,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 591 states have (on average 1.5397631133671743) internal successors, (910), 618 states have internal predecessors, (910), 224 states have call successors, (224), 83 states have call predecessors, (224), 80 states have return successors, (227), 218 states have call predecessors, (227), 217 states have call successors, (227) [2023-04-01 05:32:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1361 transitions. [2023-04-01 05:32:35,196 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1361 transitions. Word has length 127 [2023-04-01 05:32:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:35,197 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1361 transitions. [2023-04-01 05:32:35,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 05:32:35,197 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1361 transitions. [2023-04-01 05:32:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 05:32:35,203 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:35,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:35,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:32:35,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:35,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1449509862, now seen corresponding path program 1 times [2023-04-01 05:32:35,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:35,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679079899] [2023-04-01 05:32:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:35,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:35,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:35,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679079899] [2023-04-01 05:32:35,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679079899] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:35,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:32:35,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:32:35,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207758511] [2023-04-01 05:32:35,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:35,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:32:35,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:35,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:32:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:35,571 INFO L87 Difference]: Start difference. First operand 896 states and 1361 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:32:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:35,716 INFO L93 Difference]: Finished difference Result 1353 states and 2073 transitions. [2023-04-01 05:32:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:32:35,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 132 [2023-04-01 05:32:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:35,723 INFO L225 Difference]: With dead ends: 1353 [2023-04-01 05:32:35,723 INFO L226 Difference]: Without dead ends: 918 [2023-04-01 05:32:35,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:35,726 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 6 mSDsluCounter, 3343 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4021 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:35,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4021 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:32:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-04-01 05:32:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 910. [2023-04-01 05:32:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 601 states have (on average 1.5307820299500832) internal successors, (920), 628 states have internal predecessors, (920), 224 states have call successors, (224), 83 states have call predecessors, (224), 84 states have return successors, (237), 222 states have call predecessors, (237), 217 states have call successors, (237) [2023-04-01 05:32:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1381 transitions. [2023-04-01 05:32:35,766 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1381 transitions. Word has length 132 [2023-04-01 05:32:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:35,767 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1381 transitions. [2023-04-01 05:32:35,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:32:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1381 transitions. [2023-04-01 05:32:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 05:32:35,769 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:35,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:35,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:32:35,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:35,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1807680061, now seen corresponding path program 1 times [2023-04-01 05:32:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:35,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108727789] [2023-04-01 05:32:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:35,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:36,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108727789] [2023-04-01 05:32:36,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108727789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:36,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:32:36,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:32:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341213056] [2023-04-01 05:32:36,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:36,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:32:36,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:36,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:32:36,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:36,047 INFO L87 Difference]: Start difference. First operand 910 states and 1381 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:32:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:36,199 INFO L93 Difference]: Finished difference Result 1370 states and 2095 transitions. [2023-04-01 05:32:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:32:36,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 131 [2023-04-01 05:32:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:36,204 INFO L225 Difference]: With dead ends: 1370 [2023-04-01 05:32:36,204 INFO L226 Difference]: Without dead ends: 928 [2023-04-01 05:32:36,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:36,213 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 6 mSDsluCounter, 3343 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4021 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:36,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4021 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:32:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2023-04-01 05:32:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 912. [2023-04-01 05:32:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 603 states have (on average 1.529021558872305) internal successors, (922), 628 states have internal predecessors, (922), 224 states have call successors, (224), 83 states have call predecessors, (224), 84 states have return successors, (237), 224 states have call predecessors, (237), 217 states have call successors, (237) [2023-04-01 05:32:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1383 transitions. [2023-04-01 05:32:36,252 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1383 transitions. Word has length 131 [2023-04-01 05:32:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:36,252 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1383 transitions. [2023-04-01 05:32:36,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:32:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1383 transitions. [2023-04-01 05:32:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 05:32:36,256 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:36,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:36,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:32:36,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:36,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash -867480006, now seen corresponding path program 1 times [2023-04-01 05:32:36,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:36,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52900331] [2023-04-01 05:32:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:36,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:36,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:36,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52900331] [2023-04-01 05:32:36,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52900331] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:36,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:32:36,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:32:36,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260822611] [2023-04-01 05:32:36,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:36,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:32:36,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:36,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:32:36,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:36,508 INFO L87 Difference]: Start difference. First operand 912 states and 1383 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:32:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:36,651 INFO L93 Difference]: Finished difference Result 1373 states and 2098 transitions. [2023-04-01 05:32:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:32:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 132 [2023-04-01 05:32:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:36,656 INFO L225 Difference]: With dead ends: 1373 [2023-04-01 05:32:36,656 INFO L226 Difference]: Without dead ends: 930 [2023-04-01 05:32:36,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:36,659 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 6 mSDsluCounter, 3343 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4021 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:36,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4021 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:32:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2023-04-01 05:32:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 914. [2023-04-01 05:32:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 605 states have (on average 1.5272727272727273) internal successors, (924), 628 states have internal predecessors, (924), 224 states have call successors, (224), 83 states have call predecessors, (224), 84 states have return successors, (237), 226 states have call predecessors, (237), 217 states have call successors, (237) [2023-04-01 05:32:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1385 transitions. [2023-04-01 05:32:36,688 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1385 transitions. Word has length 132 [2023-04-01 05:32:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:36,688 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1385 transitions. [2023-04-01 05:32:36,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:32:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1385 transitions. [2023-04-01 05:32:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 05:32:36,691 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:36,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:36,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:32:36,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:36,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:36,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1925586926, now seen corresponding path program 1 times [2023-04-01 05:32:36,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:36,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426998130] [2023-04-01 05:32:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:36,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:37,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:37,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426998130] [2023-04-01 05:32:37,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426998130] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:37,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:32:37,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:32:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31261115] [2023-04-01 05:32:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:37,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:32:37,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:32:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:32:37,047 INFO L87 Difference]: Start difference. First operand 914 states and 1385 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-01 05:32:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:37,874 INFO L93 Difference]: Finished difference Result 1929 states and 2950 transitions. [2023-04-01 05:32:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:32:37,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 136 [2023-04-01 05:32:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:37,882 INFO L225 Difference]: With dead ends: 1929 [2023-04-01 05:32:37,882 INFO L226 Difference]: Without dead ends: 1360 [2023-04-01 05:32:37,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:32:37,886 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 1249 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:37,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 2148 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 05:32:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2023-04-01 05:32:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1341. [2023-04-01 05:32:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 881 states have (on average 1.4824063564131669) internal successors, (1306), 915 states have internal predecessors, (1306), 328 states have call successors, (328), 126 states have call predecessors, (328), 131 states have return successors, (367), 335 states have call predecessors, (367), 320 states have call successors, (367) [2023-04-01 05:32:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2001 transitions. [2023-04-01 05:32:37,953 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2001 transitions. Word has length 136 [2023-04-01 05:32:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:37,953 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 2001 transitions. [2023-04-01 05:32:37,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-01 05:32:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2001 transitions. [2023-04-01 05:32:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 05:32:37,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:37,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:37,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 05:32:37,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:37,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1610757857, now seen corresponding path program 1 times [2023-04-01 05:32:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:37,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137892676] [2023-04-01 05:32:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:37,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:38,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:38,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137892676] [2023-04-01 05:32:38,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137892676] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:38,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:32:38,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 05:32:38,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529817377] [2023-04-01 05:32:38,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:38,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:32:38,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:38,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:32:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:32:38,416 INFO L87 Difference]: Start difference. First operand 1341 states and 2001 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-01 05:32:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:38,733 INFO L93 Difference]: Finished difference Result 2501 states and 3799 transitions. [2023-04-01 05:32:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:32:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) Word has length 139 [2023-04-01 05:32:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:38,741 INFO L225 Difference]: With dead ends: 2501 [2023-04-01 05:32:38,741 INFO L226 Difference]: Without dead ends: 1489 [2023-04-01 05:32:38,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-01 05:32:38,747 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 232 mSDsluCounter, 4602 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 5299 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:38,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 5299 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:32:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2023-04-01 05:32:38,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1489. [2023-04-01 05:32:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1016 states have (on average 1.4872047244094488) internal successors, (1511), 1055 states have internal predecessors, (1511), 332 states have call successors, (332), 130 states have call predecessors, (332), 140 states have return successors, (371), 339 states have call predecessors, (371), 324 states have call successors, (371) [2023-04-01 05:32:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2214 transitions. [2023-04-01 05:32:38,796 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2214 transitions. Word has length 139 [2023-04-01 05:32:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:38,797 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 2214 transitions. [2023-04-01 05:32:38,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-01 05:32:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2214 transitions. [2023-04-01 05:32:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 05:32:38,800 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:38,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:38,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 05:32:38,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:38,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash -476402017, now seen corresponding path program 1 times [2023-04-01 05:32:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:38,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067017608] [2023-04-01 05:32:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:39,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:39,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067017608] [2023-04-01 05:32:39,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067017608] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:39,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:32:39,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:32:39,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136411142] [2023-04-01 05:32:39,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:39,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:32:39,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:32:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:32:39,108 INFO L87 Difference]: Start difference. First operand 1489 states and 2214 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-01 05:32:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:39,832 INFO L93 Difference]: Finished difference Result 5729 states and 8876 transitions. [2023-04-01 05:32:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:32:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 139 [2023-04-01 05:32:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:39,857 INFO L225 Difference]: With dead ends: 5729 [2023-04-01 05:32:39,857 INFO L226 Difference]: Without dead ends: 4277 [2023-04-01 05:32:39,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:32:39,868 INFO L413 NwaCegarLoop]: 1344 mSDtfsCounter, 1305 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:39,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 2663 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 05:32:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2023-04-01 05:32:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 4224. [2023-04-01 05:32:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 2939 states have (on average 1.483157536577067) internal successors, (4359), 3051 states have internal predecessors, (4359), 890 states have call successors, (890), 353 states have call predecessors, (890), 394 states have return successors, (1184), 909 states have call predecessors, (1184), 876 states have call successors, (1184) [2023-04-01 05:32:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 6433 transitions. [2023-04-01 05:32:40,092 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 6433 transitions. Word has length 139 [2023-04-01 05:32:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:40,092 INFO L495 AbstractCegarLoop]: Abstraction has 4224 states and 6433 transitions. [2023-04-01 05:32:40,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-01 05:32:40,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 6433 transitions. [2023-04-01 05:32:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-01 05:32:40,095 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:40,095 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:40,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 05:32:40,095 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:40,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:40,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1055239108, now seen corresponding path program 1 times [2023-04-01 05:32:40,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:40,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654618028] [2023-04-01 05:32:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:40,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:40,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:40,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654618028] [2023-04-01 05:32:40,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654618028] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:40,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:32:40,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:32:40,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073300520] [2023-04-01 05:32:40,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:40,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:32:40,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:32:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:32:40,465 INFO L87 Difference]: Start difference. First operand 4224 states and 6433 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-01 05:32:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:41,055 INFO L93 Difference]: Finished difference Result 7242 states and 11098 transitions. [2023-04-01 05:32:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:32:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 140 [2023-04-01 05:32:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:41,072 INFO L225 Difference]: With dead ends: 7242 [2023-04-01 05:32:41,073 INFO L226 Difference]: Without dead ends: 4264 [2023-04-01 05:32:41,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:32:41,083 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 581 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:41,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 3000 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 05:32:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2023-04-01 05:32:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 4239. [2023-04-01 05:32:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 2948 states have (on average 1.4816824966078697) internal successors, (4368), 3063 states have internal predecessors, (4368), 893 states have call successors, (893), 356 states have call predecessors, (893), 397 states have return successors, (1193), 909 states have call predecessors, (1193), 879 states have call successors, (1193) [2023-04-01 05:32:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 6454 transitions. [2023-04-01 05:32:41,227 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 6454 transitions. Word has length 140 [2023-04-01 05:32:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:41,227 INFO L495 AbstractCegarLoop]: Abstraction has 4239 states and 6454 transitions. [2023-04-01 05:32:41,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-01 05:32:41,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 6454 transitions. [2023-04-01 05:32:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 05:32:41,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:41,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:41,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 05:32:41,231 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:41,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash 829498051, now seen corresponding path program 1 times [2023-04-01 05:32:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:41,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629548095] [2023-04-01 05:32:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 05:32:41,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:41,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629548095] [2023-04-01 05:32:41,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629548095] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:41,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711576138] [2023-04-01 05:32:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:41,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:41,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:41,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:32:41,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:32:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:41,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:32:41,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:32:41,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:41,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711576138] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:41,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:41,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-01 05:32:41,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778405843] [2023-04-01 05:32:41,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:41,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:32:41,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:41,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:32:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:32:41,868 INFO L87 Difference]: Start difference. First operand 4239 states and 6454 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:42,150 INFO L93 Difference]: Finished difference Result 8495 states and 13136 transitions. [2023-04-01 05:32:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:32:42,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 145 [2023-04-01 05:32:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:42,181 INFO L225 Difference]: With dead ends: 8495 [2023-04-01 05:32:42,181 INFO L226 Difference]: Without dead ends: 4293 [2023-04-01 05:32:42,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:32:42,211 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 85 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:42,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1893 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:32:42,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2023-04-01 05:32:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4293. [2023-04-01 05:32:42,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 2993 states have (on average 1.4774473772134982) internal successors, (4422), 3108 states have internal predecessors, (4422), 893 states have call successors, (893), 365 states have call predecessors, (893), 406 states have return successors, (1193), 909 states have call predecessors, (1193), 879 states have call successors, (1193) [2023-04-01 05:32:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6508 transitions. [2023-04-01 05:32:42,379 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6508 transitions. Word has length 145 [2023-04-01 05:32:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:42,380 INFO L495 AbstractCegarLoop]: Abstraction has 4293 states and 6508 transitions. [2023-04-01 05:32:42,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6508 transitions. [2023-04-01 05:32:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 05:32:42,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:42,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:42,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:32:42,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 05:32:42,592 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:42,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1085575162, now seen corresponding path program 1 times [2023-04-01 05:32:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:42,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165668685] [2023-04-01 05:32:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:42,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:42,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:42,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165668685] [2023-04-01 05:32:42,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165668685] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:42,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180562844] [2023-04-01 05:32:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:42,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:42,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:42,753 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) [2023-04-01 05:32:42,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:32:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:43,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:32:43,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 05:32:43,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180562844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:43,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-01 05:32:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424673628] [2023-04-01 05:32:43,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:32:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:32:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:43,193 INFO L87 Difference]: Start difference. First operand 4293 states and 6508 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:43,421 INFO L93 Difference]: Finished difference Result 8576 states and 13158 transitions. [2023-04-01 05:32:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:32:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 147 [2023-04-01 05:32:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:43,438 INFO L225 Difference]: With dead ends: 8576 [2023-04-01 05:32:43,438 INFO L226 Difference]: Without dead ends: 4284 [2023-04-01 05:32:43,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:32:43,453 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 91 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:43,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1889 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:32:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2023-04-01 05:32:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 4284. [2023-04-01 05:32:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 2984 states have (on average 1.4698391420911527) internal successors, (4386), 3099 states have internal predecessors, (4386), 893 states have call successors, (893), 365 states have call predecessors, (893), 406 states have return successors, (1193), 909 states have call predecessors, (1193), 879 states have call successors, (1193) [2023-04-01 05:32:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 6472 transitions. [2023-04-01 05:32:43,590 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 6472 transitions. Word has length 147 [2023-04-01 05:32:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:43,590 INFO L495 AbstractCegarLoop]: Abstraction has 4284 states and 6472 transitions. [2023-04-01 05:32:43,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 6472 transitions. [2023-04-01 05:32:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 05:32:43,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:43,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:43,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:32:43,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:43,802 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:43,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:43,802 INFO L85 PathProgramCache]: Analyzing trace with hash 133225845, now seen corresponding path program 1 times [2023-04-01 05:32:43,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:43,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540648948] [2023-04-01 05:32:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:43,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 05:32:43,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:43,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540648948] [2023-04-01 05:32:43,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540648948] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:43,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219506352] [2023-04-01 05:32:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:43,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:43,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:43,984 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) [2023-04-01 05:32:43,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:32:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:44,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:32:44,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:32:44,455 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:44,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219506352] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:44,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:44,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 05:32:44,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925558452] [2023-04-01 05:32:44,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:44,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:32:44,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:32:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:32:44,457 INFO L87 Difference]: Start difference. First operand 4284 states and 6472 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 05:32:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:45,335 INFO L93 Difference]: Finished difference Result 11000 states and 17293 transitions. [2023-04-01 05:32:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:32:45,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 147 [2023-04-01 05:32:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:45,370 INFO L225 Difference]: With dead ends: 11000 [2023-04-01 05:32:45,371 INFO L226 Difference]: Without dead ends: 6753 [2023-04-01 05:32:45,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:32:45,391 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 680 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:45,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 2093 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 05:32:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6753 states. [2023-04-01 05:32:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6753 to 6674. [2023-04-01 05:32:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6674 states, 4633 states have (on average 1.4463630477012734) internal successors, (6701), 4827 states have internal predecessors, (6701), 1399 states have call successors, (1399), 577 states have call predecessors, (1399), 641 states have return successors, (2114), 1419 states have call predecessors, (2114), 1379 states have call successors, (2114) [2023-04-01 05:32:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6674 states to 6674 states and 10214 transitions. [2023-04-01 05:32:45,653 INFO L78 Accepts]: Start accepts. Automaton has 6674 states and 10214 transitions. Word has length 147 [2023-04-01 05:32:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:45,653 INFO L495 AbstractCegarLoop]: Abstraction has 6674 states and 10214 transitions. [2023-04-01 05:32:45,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 05:32:45,654 INFO L276 IsEmpty]: Start isEmpty. Operand 6674 states and 10214 transitions. [2023-04-01 05:32:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 05:32:45,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:45,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:45,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:32:45,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:45,867 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:45,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:45,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1179963397, now seen corresponding path program 1 times [2023-04-01 05:32:45,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:45,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725801607] [2023-04-01 05:32:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:45,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:32:46,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725801607] [2023-04-01 05:32:46,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725801607] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275021736] [2023-04-01 05:32:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:46,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:46,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:46,277 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) [2023-04-01 05:32:46,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:32:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:46,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 2669 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 05:32:46,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 05:32:46,906 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:46,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275021736] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:46,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:46,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-04-01 05:32:46,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036256436] [2023-04-01 05:32:46,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:46,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:32:46,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:32:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:32:46,908 INFO L87 Difference]: Start difference. First operand 6674 states and 10214 transitions. Second operand has 7 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-01 05:32:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:47,696 INFO L93 Difference]: Finished difference Result 14584 states and 22847 transitions. [2023-04-01 05:32:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:32:47,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 149 [2023-04-01 05:32:47,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:47,731 INFO L225 Difference]: With dead ends: 14584 [2023-04-01 05:32:47,731 INFO L226 Difference]: Without dead ends: 7947 [2023-04-01 05:32:47,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-01 05:32:47,751 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 1264 mSDsluCounter, 2291 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:47,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1267 Valid, 3174 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 05:32:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2023-04-01 05:32:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 7923. [2023-04-01 05:32:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7923 states, 5505 states have (on average 1.4272479564032698) internal successors, (7857), 5709 states have internal predecessors, (7857), 1591 states have call successors, (1591), 755 states have call predecessors, (1591), 826 states have return successors, (3106), 1608 states have call predecessors, (3106), 1559 states have call successors, (3106) [2023-04-01 05:32:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7923 states to 7923 states and 12554 transitions. [2023-04-01 05:32:48,072 INFO L78 Accepts]: Start accepts. Automaton has 7923 states and 12554 transitions. Word has length 149 [2023-04-01 05:32:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:48,073 INFO L495 AbstractCegarLoop]: Abstraction has 7923 states and 12554 transitions. [2023-04-01 05:32:48,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-01 05:32:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7923 states and 12554 transitions. [2023-04-01 05:32:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 05:32:48,075 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:48,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:48,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 05:32:48,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 05:32:48,286 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:48,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash 924669533, now seen corresponding path program 1 times [2023-04-01 05:32:48,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:48,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853700715] [2023-04-01 05:32:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:48,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:32:48,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853700715] [2023-04-01 05:32:48,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853700715] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855604521] [2023-04-01 05:32:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:48,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:48,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:48,469 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) [2023-04-01 05:32:48,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:32:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:48,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:32:48,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:32:48,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:48,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855604521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:48,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:48,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 05:32:48,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965040263] [2023-04-01 05:32:48,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:48,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:32:48,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:48,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:32:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:32:48,971 INFO L87 Difference]: Start difference. First operand 7923 states and 12554 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:49,365 INFO L93 Difference]: Finished difference Result 15950 states and 25909 transitions. [2023-04-01 05:32:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:32:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) Word has length 149 [2023-04-01 05:32:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:49,392 INFO L225 Difference]: With dead ends: 15950 [2023-04-01 05:32:49,392 INFO L226 Difference]: Without dead ends: 8077 [2023-04-01 05:32:49,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:32:49,413 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 2 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2665 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:49,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2665 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:32:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8077 states. [2023-04-01 05:32:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8077 to 7999. [2023-04-01 05:32:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7999 states, 5558 states have (on average 1.4231738035264483) internal successors, (7910), 5770 states have internal predecessors, (7910), 1591 states have call successors, (1591), 755 states have call predecessors, (1591), 849 states have return successors, (3131), 1623 states have call predecessors, (3131), 1559 states have call successors, (3131) [2023-04-01 05:32:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7999 states to 7999 states and 12632 transitions. [2023-04-01 05:32:49,652 INFO L78 Accepts]: Start accepts. Automaton has 7999 states and 12632 transitions. Word has length 149 [2023-04-01 05:32:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:49,652 INFO L495 AbstractCegarLoop]: Abstraction has 7999 states and 12632 transitions. [2023-04-01 05:32:49,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7999 states and 12632 transitions. [2023-04-01 05:32:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-01 05:32:49,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:49,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:49,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 05:32:49,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:49,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:49,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2067454122, now seen corresponding path program 1 times [2023-04-01 05:32:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:49,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911797283] [2023-04-01 05:32:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:32:50,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:50,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911797283] [2023-04-01 05:32:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911797283] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:50,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922079204] [2023-04-01 05:32:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:50,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:50,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:50,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:32:50,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:32:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:50,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:32:50,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:32:50,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:50,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922079204] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:50,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:50,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-01 05:32:50,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619035963] [2023-04-01 05:32:50,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:50,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:32:50,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:32:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:32:50,671 INFO L87 Difference]: Start difference. First operand 7999 states and 12632 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:51,132 INFO L93 Difference]: Finished difference Result 16293 states and 26566 transitions. [2023-04-01 05:32:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:32:51,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 151 [2023-04-01 05:32:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:51,167 INFO L225 Difference]: With dead ends: 16293 [2023-04-01 05:32:51,167 INFO L226 Difference]: Without dead ends: 8345 [2023-04-01 05:32:51,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:32:51,201 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 19 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:51,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1851 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:32:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states. [2023-04-01 05:32:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8345 to 8286. [2023-04-01 05:32:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8286 states, 5836 states have (on average 1.432145305003427) internal successors, (8358), 6057 states have internal predecessors, (8358), 1591 states have call successors, (1591), 755 states have call predecessors, (1591), 858 states have return successors, (3140), 1623 states have call predecessors, (3140), 1559 states have call successors, (3140) [2023-04-01 05:32:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8286 states to 8286 states and 13089 transitions. [2023-04-01 05:32:51,498 INFO L78 Accepts]: Start accepts. Automaton has 8286 states and 13089 transitions. Word has length 151 [2023-04-01 05:32:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:51,498 INFO L495 AbstractCegarLoop]: Abstraction has 8286 states and 13089 transitions. [2023-04-01 05:32:51,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8286 states and 13089 transitions. [2023-04-01 05:32:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 05:32:51,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:51,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:51,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 05:32:51,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:51,710 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:51,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:51,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1961042279, now seen corresponding path program 1 times [2023-04-01 05:32:51,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:51,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338504293] [2023-04-01 05:32:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:51,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:32:52,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338504293] [2023-04-01 05:32:52,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338504293] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235069531] [2023-04-01 05:32:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:52,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:52,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:32:52,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:32:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:52,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 2676 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:32:52,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:32:52,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:52,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235069531] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:52,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:52,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-04-01 05:32:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816247823] [2023-04-01 05:32:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:32:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:32:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:52,543 INFO L87 Difference]: Start difference. First operand 8286 states and 13089 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 05:32:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:53,541 INFO L93 Difference]: Finished difference Result 21346 states and 36351 transitions. [2023-04-01 05:32:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:32:53,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 152 [2023-04-01 05:32:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:53,606 INFO L225 Difference]: With dead ends: 21346 [2023-04-01 05:32:53,606 INFO L226 Difference]: Without dead ends: 14418 [2023-04-01 05:32:53,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:32:53,645 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 688 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:53,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 2143 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 05:32:53,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14418 states. [2023-04-01 05:32:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14418 to 13881. [2023-04-01 05:32:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13881 states, 9708 states have (on average 1.4321178409559125) internal successors, (13903), 10082 states have internal predecessors, (13903), 2719 states have call successors, (2719), 1303 states have call predecessors, (2719), 1453 states have return successors, (6655), 2765 states have call predecessors, (6655), 2663 states have call successors, (6655) [2023-04-01 05:32:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13881 states to 13881 states and 23277 transitions. [2023-04-01 05:32:54,450 INFO L78 Accepts]: Start accepts. Automaton has 13881 states and 23277 transitions. Word has length 152 [2023-04-01 05:32:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:54,450 INFO L495 AbstractCegarLoop]: Abstraction has 13881 states and 23277 transitions. [2023-04-01 05:32:54,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 05:32:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13881 states and 23277 transitions. [2023-04-01 05:32:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 05:32:54,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:54,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:54,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 05:32:54,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 05:32:54,682 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:54,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash 68619907, now seen corresponding path program 1 times [2023-04-01 05:32:54,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:54,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086502454] [2023-04-01 05:32:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:54,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:32:54,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:54,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086502454] [2023-04-01 05:32:54,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086502454] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:54,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318994515] [2023-04-01 05:32:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:54,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:54,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:54,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:32:54,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 05:32:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:55,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:32:55,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 05:32:55,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:55,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318994515] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:55,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:55,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-01 05:32:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052502398] [2023-04-01 05:32:55,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:55,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:32:55,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:55,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:32:55,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:32:55,288 INFO L87 Difference]: Start difference. First operand 13881 states and 23277 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:55,940 INFO L93 Difference]: Finished difference Result 28064 states and 49518 transitions. [2023-04-01 05:32:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:32:55,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 152 [2023-04-01 05:32:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:32:56,014 INFO L225 Difference]: With dead ends: 28064 [2023-04-01 05:32:56,014 INFO L226 Difference]: Without dead ends: 14234 [2023-04-01 05:32:56,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:32:56,088 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 5 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:32:56,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1325 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:32:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14234 states. [2023-04-01 05:32:56,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14234 to 13937. [2023-04-01 05:32:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13937 states, 9764 states have (on average 1.4211388775092175) internal successors, (13876), 10138 states have internal predecessors, (13876), 2719 states have call successors, (2719), 1303 states have call predecessors, (2719), 1453 states have return successors, (6655), 2765 states have call predecessors, (6655), 2663 states have call successors, (6655) [2023-04-01 05:32:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13937 states to 13937 states and 23250 transitions. [2023-04-01 05:32:57,084 INFO L78 Accepts]: Start accepts. Automaton has 13937 states and 23250 transitions. Word has length 152 [2023-04-01 05:32:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:32:57,084 INFO L495 AbstractCegarLoop]: Abstraction has 13937 states and 23250 transitions. [2023-04-01 05:32:57,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:32:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 13937 states and 23250 transitions. [2023-04-01 05:32:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 05:32:57,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:32:57,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:32:57,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 05:32:57,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 05:32:57,288 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:32:57,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:32:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1941826302, now seen corresponding path program 1 times [2023-04-01 05:32:57,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:32:57,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544037677] [2023-04-01 05:32:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:57,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:32:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:32:57,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:32:57,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544037677] [2023-04-01 05:32:57,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544037677] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:32:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215263776] [2023-04-01 05:32:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:32:57,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:32:57,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:32:57,919 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:32:57,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 05:32:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:32:58,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:32:58,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:32:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:32:58,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:32:58,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215263776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:32:58,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:32:58,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-04-01 05:32:58,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430549439] [2023-04-01 05:32:58,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:32:58,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:32:58,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:32:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:32:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:32:58,503 INFO L87 Difference]: Start difference. First operand 13937 states and 23250 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 05:32:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:32:59,947 INFO L93 Difference]: Finished difference Result 32495 states and 57676 transitions. [2023-04-01 05:32:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:32:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 153 [2023-04-01 05:32:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:33:00,035 INFO L225 Difference]: With dead ends: 32495 [2023-04-01 05:33:00,035 INFO L226 Difference]: Without dead ends: 19927 [2023-04-01 05:33:00,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:33:00,112 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 707 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:33:00,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 2110 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 05:33:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19927 states. [2023-04-01 05:33:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19927 to 19448. [2023-04-01 05:33:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19448 states, 13560 states have (on average 1.4207227138643068) internal successors, (19265), 14087 states have internal predecessors, (19265), 3843 states have call successors, (3843), 1849 states have call predecessors, (3843), 2044 states have return successors, (11190), 3901 states have call predecessors, (11190), 3763 states have call successors, (11190) [2023-04-01 05:33:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19448 states to 19448 states and 34298 transitions. [2023-04-01 05:33:01,139 INFO L78 Accepts]: Start accepts. Automaton has 19448 states and 34298 transitions. Word has length 153 [2023-04-01 05:33:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:33:01,141 INFO L495 AbstractCegarLoop]: Abstraction has 19448 states and 34298 transitions. [2023-04-01 05:33:01,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 05:33:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 19448 states and 34298 transitions. [2023-04-01 05:33:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-01 05:33:01,144 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:33:01,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:33:01,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 05:33:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 05:33:01,350 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:33:01,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:33:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -529025681, now seen corresponding path program 1 times [2023-04-01 05:33:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:33:01,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274037348] [2023-04-01 05:33:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:33:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:33:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:33:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:33:01,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:33:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274037348] [2023-04-01 05:33:01,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274037348] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:33:01,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947637962] [2023-04-01 05:33:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:33:01,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:33:01,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:33:01,679 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:33:01,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 05:33:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:33:02,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 2678 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:33:02,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:33:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:33:02,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:33:02,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947637962] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:33:02,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:33:02,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-04-01 05:33:02,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843547598] [2023-04-01 05:33:02,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:33:02,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:33:02,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:33:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:33:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:33:02,245 INFO L87 Difference]: Start difference. First operand 19448 states and 34298 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 05:33:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:33:04,107 INFO L93 Difference]: Finished difference Result 42798 states and 78657 transitions. [2023-04-01 05:33:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:33:04,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 154 [2023-04-01 05:33:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:33:04,249 INFO L225 Difference]: With dead ends: 42798 [2023-04-01 05:33:04,249 INFO L226 Difference]: Without dead ends: 24726 [2023-04-01 05:33:04,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:33:04,451 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 707 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2172 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:33:04,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 2172 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 05:33:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24726 states. [2023-04-01 05:33:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24726 to 23848. [2023-04-01 05:33:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23848 states, 16427 states have (on average 1.4207706824131003) internal successors, (23339), 17097 states have internal predecessors, (23339), 4873 states have call successors, (4873), 2329 states have call predecessors, (4873), 2547 states have return successors, (15275), 4931 states have call predecessors, (15275), 4775 states have call successors, (15275) [2023-04-01 05:33:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23848 states to 23848 states and 43487 transitions. [2023-04-01 05:33:06,010 INFO L78 Accepts]: Start accepts. Automaton has 23848 states and 43487 transitions. Word has length 154 [2023-04-01 05:33:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:33:06,010 INFO L495 AbstractCegarLoop]: Abstraction has 23848 states and 43487 transitions. [2023-04-01 05:33:06,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 05:33:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 23848 states and 43487 transitions. [2023-04-01 05:33:06,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-01 05:33:06,025 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:33:06,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:33:06,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-01 05:33:06,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:33:06,226 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:33:06,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:33:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash 854069512, now seen corresponding path program 1 times [2023-04-01 05:33:06,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:33:06,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062202975] [2023-04-01 05:33:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:33:06,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:33:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:33:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 05:33:06,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:33:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062202975] [2023-04-01 05:33:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062202975] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:33:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524925953] [2023-04-01 05:33:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:33:06,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:33:06,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:33:06,428 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:33:06,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 05:33:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:33:06,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:33:06,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:33:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:33:06,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:33:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:33:07,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524925953] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:33:07,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638791614] [2023-04-01 05:33:07,256 INFO L159 IcfgInterpreter]: Started Sifa with 138 locations of interest [2023-04-01 05:33:07,256 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:33:07,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:33:07,262 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:33:07,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:33:10,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 172 for LOIs [2023-04-01 05:33:10,657 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 223 for LOIs [2023-04-01 05:33:13,337 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 223 for LOIs [2023-04-01 05:33:13,744 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 223 for LOIs [2023-04-01 05:33:16,712 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...