/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 IntervalDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:33:55,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:33:55,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:33:55,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:33:55,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:33:55,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:33:55,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:33:55,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:33:55,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:33:55,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:33:55,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:33:55,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:33:55,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:33:55,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:33:55,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:33:55,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:33:55,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:33:55,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:33:55,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:33:55,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:33:55,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:33:55,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:33:55,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:33:55,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:33:55,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:33:55,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:33:55,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:33:55,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:33:55,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:33:55,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:33:55,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:33:55,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:33:55,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:33:55,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:33:55,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:33:55,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:33:55,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:33:55,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:33:55,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:33:55,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:33:55,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:33:56,000 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 [2023-03-31 23:33:56,020 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:33:56,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:33:56,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:33:56,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:33:56,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:33:56,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:33:56,024 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:33:56,024 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:33:56,024 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:33:56,024 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:33:56,025 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:33:56,025 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:33:56,025 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:33:56,025 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:33:56,026 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:33:56,026 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:33:56,026 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:33:56,026 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:33:56,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:33:56,027 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:33:56,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:33:56,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:33:56,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:33:56,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:33:56,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:33:56,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:33:56,028 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:33:56,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:33:56,028 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:33:56,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:33:56,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:33:56,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:33:56,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:33:56,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:33:56,028 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:33:56,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:33:56,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:33:56,029 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:33:56,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:33:56,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:33:56,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:33:56,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:33:56,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:33:56,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:33:56,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:33:56,256 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:33:56,257 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:33:56,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2023-03-31 23:33:57,369 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:33:57,657 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:33:57,657 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2023-03-31 23:33:57,679 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2472021/27650485feab4b87b81212b4b9a4cc73/FLAGb4c707874 [2023-03-31 23:33:57,973 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2472021/27650485feab4b87b81212b4b9a4cc73 [2023-03-31 23:33:57,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:33:57,975 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:33:57,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:33:57,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:33:57,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:33:57,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:33:57" (1/1) ... [2023-03-31 23:33:57,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200e473a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:57, skipping insertion in model container [2023-03-31 23:33:57,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:33:57" (1/1) ... [2023-03-31 23:33:58,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:33:58,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:33:58,206 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2023-03-31 23:33:58,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:33:58,506 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:33:58,516 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2023-03-31 23:33:58,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:33:58,619 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:33:58,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58 WrapperNode [2023-03-31 23:33:58,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:33:58,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:33:58,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:33:58,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:33:58,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (1/1) ... [2023-03-31 23:33:58,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (1/1) ... [2023-03-31 23:33:58,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (1/1) ... [2023-03-31 23:33:58,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (1/1) ... [2023-03-31 23:33:58,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (1/1) ... [2023-03-31 23:33:58,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (1/1) ... [2023-03-31 23:33:58,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (1/1) ... [2023-03-31 23:33:58,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (1/1) ... [2023-03-31 23:33:58,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:33:58,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:33:58,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:33:58,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:33:58,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (1/1) ... [2023-03-31 23:33:58,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:33:58,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:33:58,814 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) [2023-03-31 23:33:58,832 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 [2023-03-31 23:33:58,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:33:58,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:33:58,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:33:58,845 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:33:58,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:33:58,846 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:33:58,846 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:33:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:33:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:33:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:33:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-03-31 23:33:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:33:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:33:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:33:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:33:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:33:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:33:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:33:58,850 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:33:58,850 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:33:58,850 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:33:58,850 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-03-31 23:33:58,850 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:33:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:33:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:33:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-03-31 23:33:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:33:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:33:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:33:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:33:58,852 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:33:58,852 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:33:58,852 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-03-31 23:33:58,852 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-03-31 23:33:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:33:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:33:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-03-31 23:33:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-03-31 23:33:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-03-31 23:33:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-03-31 23:33:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:33:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:33:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:33:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:33:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:33:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:33:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:33:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:33:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:33:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:33:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:33:58,856 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:33:58,856 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:33:58,856 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:33:58,856 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:33:58,856 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:33:58,856 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:33:58,856 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:33:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:33:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:33:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:33:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:33:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:33:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:33:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:33:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:33:58,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:33:58,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:33:58,865 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:33:58,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:33:58,865 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:33:58,865 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:33:58,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:33:58,865 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:33:58,865 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:33:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:33:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:33:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:33:59,139 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:33:59,161 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:34:00,171 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:34:00,762 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:34:00,763 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:34:00,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:34:00 BoogieIcfgContainer [2023-03-31 23:34:00,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:34:00,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:34:00,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:34:00,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:34:00,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:33:57" (1/3) ... [2023-03-31 23:34:00,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb2405d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:34:00, skipping insertion in model container [2023-03-31 23:34:00,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:58" (2/3) ... [2023-03-31 23:34:00,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb2405d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:34:00, skipping insertion in model container [2023-03-31 23:34:00,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:34:00" (3/3) ... [2023-03-31 23:34:00,774 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product11.cil.c [2023-03-31 23:34:00,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:34:00,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:34:00,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:34:00,852 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;@4778be88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:34:00,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:34:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 564 states, 331 states have (on average 1.4924471299093656) internal successors, (494), 358 states have internal predecessors, (494), 171 states have call successors, (171), 49 states have call predecessors, (171), 49 states have return successors, (171), 162 states have call predecessors, (171), 171 states have call successors, (171) [2023-03-31 23:34:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-03-31 23:34:00,882 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:00,883 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:00,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:00,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1754782928, now seen corresponding path program 1 times [2023-03-31 23:34:00,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:00,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656314877] [2023-03-31 23:34:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:00,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:34:01,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:01,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656314877] [2023-03-31 23:34:01,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656314877] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:01,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:01,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:34:01,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458696239] [2023-03-31 23:34:01,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:01,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:34:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:34:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:34:01,455 INFO L87 Difference]: Start difference. First operand has 564 states, 331 states have (on average 1.4924471299093656) internal successors, (494), 358 states have internal predecessors, (494), 171 states have call successors, (171), 49 states have call predecessors, (171), 49 states have return successors, (171), 162 states have call predecessors, (171), 171 states have call successors, (171) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2023-03-31 23:34:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:01,604 INFO L93 Difference]: Finished difference Result 467 states and 697 transitions. [2023-03-31 23:34:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:34:01,606 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 112 [2023-03-31 23:34:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:01,619 INFO L225 Difference]: With dead ends: 467 [2023-03-31 23:34:01,619 INFO L226 Difference]: Without dead ends: 433 [2023-03-31 23:34:01,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:34:01,624 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:01,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 619 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:34:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-03-31 23:34:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2023-03-31 23:34:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 275 states have (on average 1.5345454545454544) internal successors, (422), 294 states have internal predecessors, (422), 116 states have call successors, (116), 45 states have call predecessors, (116), 41 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2023-03-31 23:34:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 646 transitions. [2023-03-31 23:34:01,686 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 646 transitions. Word has length 112 [2023-03-31 23:34:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:01,687 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 646 transitions. [2023-03-31 23:34:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2023-03-31 23:34:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 646 transitions. [2023-03-31 23:34:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-03-31 23:34:01,691 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:01,691 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:01,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:34:01,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:01,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2100351780, now seen corresponding path program 1 times [2023-03-31 23:34:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:01,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026073194] [2023-03-31 23:34:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:34:02,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:02,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026073194] [2023-03-31 23:34:02,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026073194] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:02,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:02,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:34:02,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147338530] [2023-03-31 23:34:02,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:02,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:34:02,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:02,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:34:02,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:02,308 INFO L87 Difference]: Start difference. First operand 433 states and 646 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:34:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:04,476 INFO L93 Difference]: Finished difference Result 1226 states and 1875 transitions. [2023-03-31 23:34:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:34:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 113 [2023-03-31 23:34:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:04,483 INFO L225 Difference]: With dead ends: 1226 [2023-03-31 23:34:04,483 INFO L226 Difference]: Without dead ends: 835 [2023-03-31 23:34:04,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:34:04,487 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1212 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 3706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 3270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:04,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 502 Invalid, 3706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 3270 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-31 23:34:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-03-31 23:34:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 810. [2023-03-31 23:34:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 527 states have (on average 1.5502846299810247) internal successors, (817), 560 states have internal predecessors, (817), 210 states have call successors, (210), 75 states have call predecessors, (210), 72 states have return successors, (208), 198 states have call predecessors, (208), 202 states have call successors, (208) [2023-03-31 23:34:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1235 transitions. [2023-03-31 23:34:04,554 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1235 transitions. Word has length 113 [2023-03-31 23:34:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:04,554 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1235 transitions. [2023-03-31 23:34:04,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:34:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1235 transitions. [2023-03-31 23:34:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-03-31 23:34:04,556 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:04,556 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:04,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:34:04,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:04,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:04,557 INFO L85 PathProgramCache]: Analyzing trace with hash 652637344, now seen corresponding path program 1 times [2023-03-31 23:34:04,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:04,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880541388] [2023-03-31 23:34:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:04,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:34:04,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:04,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880541388] [2023-03-31 23:34:04,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880541388] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:04,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:04,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:34:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99524453] [2023-03-31 23:34:04,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:04,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:34:04,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:34:04,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:34:04,851 INFO L87 Difference]: Start difference. First operand 810 states and 1235 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-03-31 23:34:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:05,154 INFO L93 Difference]: Finished difference Result 849 states and 1291 transitions. [2023-03-31 23:34:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:05,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2023-03-31 23:34:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:05,159 INFO L225 Difference]: With dead ends: 849 [2023-03-31 23:34:05,159 INFO L226 Difference]: Without dead ends: 832 [2023-03-31 23:34:05,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:34:05,161 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 662 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:05,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1599 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:34:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2023-03-31 23:34:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 814. [2023-03-31 23:34:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 531 states have (on average 1.5461393596986817) internal successors, (821), 564 states have internal predecessors, (821), 210 states have call successors, (210), 75 states have call predecessors, (210), 72 states have return successors, (208), 198 states have call predecessors, (208), 202 states have call successors, (208) [2023-03-31 23:34:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1239 transitions. [2023-03-31 23:34:05,198 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1239 transitions. Word has length 117 [2023-03-31 23:34:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:05,198 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1239 transitions. [2023-03-31 23:34:05,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-03-31 23:34:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1239 transitions. [2023-03-31 23:34:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 23:34:05,201 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:05,201 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 23:34:05,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:05,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1730342453, now seen corresponding path program 1 times [2023-03-31 23:34:05,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:05,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678749650] [2023-03-31 23:34:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:34:05,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:05,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678749650] [2023-03-31 23:34:05,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678749650] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:05,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:05,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:34:05,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959173084] [2023-03-31 23:34:05,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:05,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:34:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:34:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:34:05,478 INFO L87 Difference]: Start difference. First operand 814 states and 1239 transitions. Second operand has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-03-31 23:34:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:05,610 INFO L93 Difference]: Finished difference Result 835 states and 1265 transitions. [2023-03-31 23:34:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:34:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) Word has length 122 [2023-03-31 23:34:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:05,615 INFO L225 Difference]: With dead ends: 835 [2023-03-31 23:34:05,615 INFO L226 Difference]: Without dead ends: 818 [2023-03-31 23:34:05,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:05,621 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 10 mSDsluCounter, 3635 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4244 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:05,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4244 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:34:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2023-03-31 23:34:05,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 814. [2023-03-31 23:34:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 531 states have (on average 1.5423728813559323) internal successors, (819), 564 states have internal predecessors, (819), 210 states have call successors, (210), 75 states have call predecessors, (210), 72 states have return successors, (208), 198 states have call predecessors, (208), 202 states have call successors, (208) [2023-03-31 23:34:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1237 transitions. [2023-03-31 23:34:05,687 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1237 transitions. Word has length 122 [2023-03-31 23:34:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:05,689 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1237 transitions. [2023-03-31 23:34:05,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-03-31 23:34:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1237 transitions. [2023-03-31 23:34:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-03-31 23:34:05,692 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:05,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:05,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:34:05,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:05,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1240685095, now seen corresponding path program 1 times [2023-03-31 23:34:05,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:05,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662124414] [2023-03-31 23:34:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:34:05,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:05,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662124414] [2023-03-31 23:34:05,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662124414] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:05,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:05,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:05,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182307065] [2023-03-31 23:34:05,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:05,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:05,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:05,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:05,984 INFO L87 Difference]: Start difference. First operand 814 states and 1237 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:07,442 INFO L93 Difference]: Finished difference Result 2434 states and 3792 transitions. [2023-03-31 23:34:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:07,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 137 [2023-03-31 23:34:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:07,453 INFO L225 Difference]: With dead ends: 2434 [2023-03-31 23:34:07,453 INFO L226 Difference]: Without dead ends: 1662 [2023-03-31 23:34:07,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:07,466 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1219 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:07,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 507 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 23:34:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2023-03-31 23:34:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1564. [2023-03-31 23:34:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1040 states have (on average 1.5557692307692308) internal successors, (1618), 1104 states have internal predecessors, (1618), 388 states have call successors, (388), 129 states have call predecessors, (388), 135 states have return successors, (417), 364 states have call predecessors, (417), 379 states have call successors, (417) [2023-03-31 23:34:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2423 transitions. [2023-03-31 23:34:07,579 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2423 transitions. Word has length 137 [2023-03-31 23:34:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:07,582 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2423 transitions. [2023-03-31 23:34:07,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2423 transitions. [2023-03-31 23:34:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-03-31 23:34:07,586 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:07,586 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:07,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 23:34:07,587 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:07,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash 192159624, now seen corresponding path program 1 times [2023-03-31 23:34:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:07,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124570543] [2023-03-31 23:34:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:07,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:34:07,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:07,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124570543] [2023-03-31 23:34:07,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124570543] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:07,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:07,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:07,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535301962] [2023-03-31 23:34:08,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:08,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:08,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:08,001 INFO L87 Difference]: Start difference. First operand 1564 states and 2423 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:09,365 INFO L93 Difference]: Finished difference Result 4629 states and 7328 transitions. [2023-03-31 23:34:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 138 [2023-03-31 23:34:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:09,380 INFO L225 Difference]: With dead ends: 4629 [2023-03-31 23:34:09,380 INFO L226 Difference]: Without dead ends: 3110 [2023-03-31 23:34:09,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:09,385 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1215 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:09,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 512 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 23:34:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2023-03-31 23:34:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2989. [2023-03-31 23:34:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2016 states have (on average 1.5629960317460319) internal successors, (3151), 2144 states have internal predecessors, (3151), 710 states have call successors, (710), 237 states have call predecessors, (710), 262 states have return successors, (835), 665 states have call predecessors, (835), 699 states have call successors, (835) [2023-03-31 23:34:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 4696 transitions. [2023-03-31 23:34:09,519 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 4696 transitions. Word has length 138 [2023-03-31 23:34:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:09,519 INFO L495 AbstractCegarLoop]: Abstraction has 2989 states and 4696 transitions. [2023-03-31 23:34:09,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 4696 transitions. [2023-03-31 23:34:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-03-31 23:34:09,521 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:09,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:09,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 23:34:09,522 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:09,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:09,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1660676859, now seen corresponding path program 1 times [2023-03-31 23:34:09,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:09,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606619486] [2023-03-31 23:34:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:34:09,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:09,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606619486] [2023-03-31 23:34:09,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606619486] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:09,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:09,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:09,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650518584] [2023-03-31 23:34:09,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:09,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:09,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:09,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:09,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:09,772 INFO L87 Difference]: Start difference. First operand 2989 states and 4696 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:11,178 INFO L93 Difference]: Finished difference Result 8952 states and 14476 transitions. [2023-03-31 23:34:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:11,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 139 [2023-03-31 23:34:11,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:11,214 INFO L225 Difference]: With dead ends: 8952 [2023-03-31 23:34:11,215 INFO L226 Difference]: Without dead ends: 6014 [2023-03-31 23:34:11,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:11,228 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1212 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:11,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 517 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 23:34:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2023-03-31 23:34:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 5848. [2023-03-31 23:34:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5848 states, 3971 states have (on average 1.5645933014354068) internal successors, (6213), 4231 states have internal predecessors, (6213), 1350 states have call successors, (1350), 453 states have call predecessors, (1350), 526 states have return successors, (1795), 1269 states have call predecessors, (1795), 1335 states have call successors, (1795) [2023-03-31 23:34:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5848 states to 5848 states and 9358 transitions. [2023-03-31 23:34:11,595 INFO L78 Accepts]: Start accepts. Automaton has 5848 states and 9358 transitions. Word has length 139 [2023-03-31 23:34:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:11,595 INFO L495 AbstractCegarLoop]: Abstraction has 5848 states and 9358 transitions. [2023-03-31 23:34:11,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5848 states and 9358 transitions. [2023-03-31 23:34:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-03-31 23:34:11,597 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:11,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:11,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 23:34:11,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:11,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:11,598 INFO L85 PathProgramCache]: Analyzing trace with hash -59925206, now seen corresponding path program 1 times [2023-03-31 23:34:11,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:11,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258399493] [2023-03-31 23:34:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:11,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:34:11,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:11,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258399493] [2023-03-31 23:34:11,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258399493] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:11,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:11,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:11,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942258027] [2023-03-31 23:34:11,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:11,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:11,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:11,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:11,878 INFO L87 Difference]: Start difference. First operand 5848 states and 9358 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:13,649 INFO L93 Difference]: Finished difference Result 17623 states and 29503 transitions. [2023-03-31 23:34:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 140 [2023-03-31 23:34:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:13,716 INFO L225 Difference]: With dead ends: 17623 [2023-03-31 23:34:13,716 INFO L226 Difference]: Without dead ends: 11838 [2023-03-31 23:34:13,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:13,740 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1209 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:13,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 522 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 23:34:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11838 states. [2023-03-31 23:34:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11838 to 11583. [2023-03-31 23:34:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11583 states, 7886 states have (on average 1.5631498858737003) internal successors, (12327), 8418 states have internal predecessors, (12327), 2622 states have call successors, (2622), 885 states have call predecessors, (2622), 1074 states have return successors, (4143), 2481 states have call predecessors, (4143), 2599 states have call successors, (4143) [2023-03-31 23:34:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11583 states to 11583 states and 19092 transitions. [2023-03-31 23:34:14,489 INFO L78 Accepts]: Start accepts. Automaton has 11583 states and 19092 transitions. Word has length 140 [2023-03-31 23:34:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:14,490 INFO L495 AbstractCegarLoop]: Abstraction has 11583 states and 19092 transitions. [2023-03-31 23:34:14,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 11583 states and 19092 transitions. [2023-03-31 23:34:14,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-03-31 23:34:14,493 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:14,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:14,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 23:34:14,494 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:14,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:14,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1858977763, now seen corresponding path program 1 times [2023-03-31 23:34:14,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:14,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247611841] [2023-03-31 23:34:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:14,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:34:14,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:14,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247611841] [2023-03-31 23:34:14,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247611841] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:14,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:14,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:14,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113215848] [2023-03-31 23:34:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:14,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:14,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:14,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:14,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:14,762 INFO L87 Difference]: Start difference. First operand 11583 states and 19092 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:17,097 INFO L93 Difference]: Finished difference Result 35042 states and 62199 transitions. [2023-03-31 23:34:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:17,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 141 [2023-03-31 23:34:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:17,221 INFO L225 Difference]: With dead ends: 35042 [2023-03-31 23:34:17,222 INFO L226 Difference]: Without dead ends: 23534 [2023-03-31 23:34:17,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:17,276 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1206 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:17,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 528 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 23:34:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23534 states. [2023-03-31 23:34:19,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23534 to 22948. [2023-03-31 23:34:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22948 states, 15668 states have (on average 1.5636967066632628) internal successors, (24500), 16730 states have internal predecessors, (24500), 5149 states have call successors, (5149), 1746 states have call predecessors, (5149), 2130 states have return successors, (9812), 4865 states have call predecessors, (9812), 5111 states have call successors, (9812) [2023-03-31 23:34:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22948 states to 22948 states and 39461 transitions. [2023-03-31 23:34:19,255 INFO L78 Accepts]: Start accepts. Automaton has 22948 states and 39461 transitions. Word has length 141 [2023-03-31 23:34:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:19,255 INFO L495 AbstractCegarLoop]: Abstraction has 22948 states and 39461 transitions. [2023-03-31 23:34:19,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-03-31 23:34:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 22948 states and 39461 transitions. [2023-03-31 23:34:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-03-31 23:34:19,264 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:19,264 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:19,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 23:34:19,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:19,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1582259276, now seen corresponding path program 1 times [2023-03-31 23:34:19,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:19,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39948903] [2023-03-31 23:34:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:19,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-31 23:34:19,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:19,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39948903] [2023-03-31 23:34:19,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39948903] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:19,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:19,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:34:19,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218707849] [2023-03-31 23:34:19,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:19,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:34:19,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:19,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:34:19,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:19,620 INFO L87 Difference]: Start difference. First operand 22948 states and 39461 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2023-03-31 23:34:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:21,057 INFO L93 Difference]: Finished difference Result 46275 states and 82613 transitions. [2023-03-31 23:34:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:21,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) Word has length 194 [2023-03-31 23:34:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:21,235 INFO L225 Difference]: With dead ends: 46275 [2023-03-31 23:34:21,235 INFO L226 Difference]: Without dead ends: 23370 [2023-03-31 23:34:21,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:21,281 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 10 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:21,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2415 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:34:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23370 states. [2023-03-31 23:34:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23370 to 23220. [2023-03-31 23:34:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23220 states, 15860 states have (on average 1.5568726355611602) internal successors, (24692), 16922 states have internal predecessors, (24692), 5165 states have call successors, (5165), 1746 states have call predecessors, (5165), 2194 states have return successors, (10119), 4945 states have call predecessors, (10119), 5127 states have call successors, (10119) [2023-03-31 23:34:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23220 states to 23220 states and 39976 transitions. [2023-03-31 23:34:22,962 INFO L78 Accepts]: Start accepts. Automaton has 23220 states and 39976 transitions. Word has length 194 [2023-03-31 23:34:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:22,963 INFO L495 AbstractCegarLoop]: Abstraction has 23220 states and 39976 transitions. [2023-03-31 23:34:22,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2023-03-31 23:34:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 23220 states and 39976 transitions. [2023-03-31 23:34:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-03-31 23:34:22,973 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:22,973 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:22,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 23:34:22,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:22,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:22,974 INFO L85 PathProgramCache]: Analyzing trace with hash -936209325, now seen corresponding path program 1 times [2023-03-31 23:34:22,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:22,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671524587] [2023-03-31 23:34:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:22,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-31 23:34:23,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:23,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671524587] [2023-03-31 23:34:23,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671524587] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:34:23,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381640026] [2023-03-31 23:34:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:23,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:23,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:34:23,345 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) [2023-03-31 23:34:23,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:34:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:23,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 3078 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:34:23,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:34:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-03-31 23:34:24,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:34:24,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381640026] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:24,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:34:24,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-03-31 23:34:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557289248] [2023-03-31 23:34:24,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:24,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:24,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:24,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:24,086 INFO L87 Difference]: Start difference. First operand 23220 states and 39976 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-03-31 23:34:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:25,729 INFO L93 Difference]: Finished difference Result 48893 states and 87640 transitions. [2023-03-31 23:34:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:25,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 199 [2023-03-31 23:34:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:25,860 INFO L225 Difference]: With dead ends: 48893 [2023-03-31 23:34:25,861 INFO L226 Difference]: Without dead ends: 25716 [2023-03-31 23:34:26,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:34:26,025 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 213 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:26,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1605 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:34:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25716 states. [2023-03-31 23:34:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25716 to 25716. [2023-03-31 23:34:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25716 states, 18292 states have (on average 1.6052919308987537) internal successors, (29364), 19354 states have internal predecessors, (29364), 5165 states have call successors, (5165), 1810 states have call predecessors, (5165), 2258 states have return successors, (10119), 4945 states have call predecessors, (10119), 5127 states have call successors, (10119) [2023-03-31 23:34:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25716 states to 25716 states and 44648 transitions. [2023-03-31 23:34:27,885 INFO L78 Accepts]: Start accepts. Automaton has 25716 states and 44648 transitions. Word has length 199 [2023-03-31 23:34:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:27,885 INFO L495 AbstractCegarLoop]: Abstraction has 25716 states and 44648 transitions. [2023-03-31 23:34:27,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-03-31 23:34:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 25716 states and 44648 transitions. [2023-03-31 23:34:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-03-31 23:34:27,896 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:27,897 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:27,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:34:28,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 23:34:28,106 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:28,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash -719841288, now seen corresponding path program 1 times [2023-03-31 23:34:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:28,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676153021] [2023-03-31 23:34:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-03-31 23:34:28,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:28,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676153021] [2023-03-31 23:34:28,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676153021] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:34:28,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360988789] [2023-03-31 23:34:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:28,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:28,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:34:28,301 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) [2023-03-31 23:34:28,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:34:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:28,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 3083 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:34:28,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:34:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-03-31 23:34:28,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:34:28,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360988789] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:28,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:34:28,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:34:28,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393582861] [2023-03-31 23:34:28,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:28,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:28,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:28,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:34:28,863 INFO L87 Difference]: Start difference. First operand 25716 states and 44648 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-03-31 23:34:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:30,440 INFO L93 Difference]: Finished difference Result 53885 states and 96918 transitions. [2023-03-31 23:34:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 204 [2023-03-31 23:34:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:30,609 INFO L225 Difference]: With dead ends: 53885 [2023-03-31 23:34:30,609 INFO L226 Difference]: Without dead ends: 28212 [2023-03-31 23:34:30,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:30,675 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 211 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:30,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1605 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:34:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28212 states. [2023-03-31 23:34:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28212 to 28212. [2023-03-31 23:34:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28212 states, 20724 states have (on average 1.642347037251496) internal successors, (34036), 21786 states have internal predecessors, (34036), 5165 states have call successors, (5165), 1874 states have call predecessors, (5165), 2322 states have return successors, (10119), 4945 states have call predecessors, (10119), 5127 states have call successors, (10119) [2023-03-31 23:34:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28212 states to 28212 states and 49320 transitions. [2023-03-31 23:34:32,427 INFO L78 Accepts]: Start accepts. Automaton has 28212 states and 49320 transitions. Word has length 204 [2023-03-31 23:34:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:32,428 INFO L495 AbstractCegarLoop]: Abstraction has 28212 states and 49320 transitions. [2023-03-31 23:34:32,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-03-31 23:34:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 28212 states and 49320 transitions. [2023-03-31 23:34:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-03-31 23:34:32,441 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:32,441 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:32,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:34:32,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 23:34:32,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:32,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash -76063304, now seen corresponding path program 1 times [2023-03-31 23:34:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:32,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015598670] [2023-03-31 23:34:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-03-31 23:34:32,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015598670] [2023-03-31 23:34:32,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015598670] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:34:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245688588] [2023-03-31 23:34:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:32,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:32,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:34:32,838 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) [2023-03-31 23:34:32,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:34:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:33,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 3087 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:34:33,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:34:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-03-31 23:34:33,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:34:33,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245688588] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:33,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:34:33,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:34:33,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984017685] [2023-03-31 23:34:33,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:33,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:33,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:34:33,391 INFO L87 Difference]: Start difference. First operand 28212 states and 49320 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-03-31 23:34:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:35,096 INFO L93 Difference]: Finished difference Result 58877 states and 106196 transitions. [2023-03-31 23:34:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:35,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 208 [2023-03-31 23:34:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:35,208 INFO L225 Difference]: With dead ends: 58877 [2023-03-31 23:34:35,208 INFO L226 Difference]: Without dead ends: 30708 [2023-03-31 23:34:35,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:35,261 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 209 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:35,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1605 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:34:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30708 states. [2023-03-31 23:34:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30708 to 30708. [2023-03-31 23:34:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30708 states, 23156 states have (on average 1.671618586975298) internal successors, (38708), 24218 states have internal predecessors, (38708), 5165 states have call successors, (5165), 1938 states have call predecessors, (5165), 2386 states have return successors, (10119), 4945 states have call predecessors, (10119), 5127 states have call successors, (10119) [2023-03-31 23:34:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30708 states to 30708 states and 53992 transitions. [2023-03-31 23:34:37,008 INFO L78 Accepts]: Start accepts. Automaton has 30708 states and 53992 transitions. Word has length 208 [2023-03-31 23:34:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:37,009 INFO L495 AbstractCegarLoop]: Abstraction has 30708 states and 53992 transitions. [2023-03-31 23:34:37,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-03-31 23:34:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 30708 states and 53992 transitions. [2023-03-31 23:34:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-03-31 23:34:37,017 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:37,017 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:37,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:34:37,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:37,227 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:37,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash 162275059, now seen corresponding path program 1 times [2023-03-31 23:34:37,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:37,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490977578] [2023-03-31 23:34:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:37,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-31 23:34:37,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:37,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490977578] [2023-03-31 23:34:37,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490977578] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:34:37,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239706125] [2023-03-31 23:34:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:37,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:37,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:34:37,485 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) [2023-03-31 23:34:37,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:34:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:37,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 3090 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:34:37,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:34:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 23:34:37,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:34:37,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239706125] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:37,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:34:37,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:34:37,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517374323] [2023-03-31 23:34:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:37,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:37,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:38,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:38,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:34:38,000 INFO L87 Difference]: Start difference. First operand 30708 states and 53992 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-03-31 23:34:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:39,802 INFO L93 Difference]: Finished difference Result 63869 states and 115474 transitions. [2023-03-31 23:34:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 211 [2023-03-31 23:34:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:39,942 INFO L225 Difference]: With dead ends: 63869 [2023-03-31 23:34:39,943 INFO L226 Difference]: Without dead ends: 33204 [2023-03-31 23:34:40,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:40,008 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 207 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:40,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1605 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:34:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33204 states. [2023-03-31 23:34:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33204 to 33204. [2023-03-31 23:34:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33204 states, 25588 states have (on average 1.6953259340315774) internal successors, (43380), 26650 states have internal predecessors, (43380), 5165 states have call successors, (5165), 2002 states have call predecessors, (5165), 2450 states have return successors, (10119), 4945 states have call predecessors, (10119), 5127 states have call successors, (10119) [2023-03-31 23:34:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33204 states to 33204 states and 58664 transitions. [2023-03-31 23:34:41,665 INFO L78 Accepts]: Start accepts. Automaton has 33204 states and 58664 transitions. Word has length 211 [2023-03-31 23:34:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:41,666 INFO L495 AbstractCegarLoop]: Abstraction has 33204 states and 58664 transitions. [2023-03-31 23:34:41,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-03-31 23:34:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 33204 states and 58664 transitions. [2023-03-31 23:34:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-03-31 23:34:41,673 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:41,674 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:41,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:34:41,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:41,880 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:41,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash -8321243, now seen corresponding path program 1 times [2023-03-31 23:34:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:41,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204351189] [2023-03-31 23:34:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-31 23:34:42,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:42,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204351189] [2023-03-31 23:34:42,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204351189] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:34:42,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308150611] [2023-03-31 23:34:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:42,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:42,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:34:42,587 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) [2023-03-31 23:34:42,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:34:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:43,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-31 23:34:43,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:34:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-03-31 23:34:43,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:34:43,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308150611] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:43,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:34:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-03-31 23:34:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007417806] [2023-03-31 23:34:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:43,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:34:43,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:34:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2023-03-31 23:34:43,148 INFO L87 Difference]: Start difference. First operand 33204 states and 58664 transitions. Second operand has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (39), 4 states have call predecessors, (39), 1 states have call successors, (39) [2023-03-31 23:34:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:44,545 INFO L93 Difference]: Finished difference Result 34071 states and 59717 transitions. [2023-03-31 23:34:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:34:44,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (39), 4 states have call predecessors, (39), 1 states have call successors, (39) Word has length 213 [2023-03-31 23:34:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:44,632 INFO L225 Difference]: With dead ends: 34071 [2023-03-31 23:34:44,632 INFO L226 Difference]: Without dead ends: 33852 [2023-03-31 23:34:44,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:34:44,647 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 8 mSDsluCounter, 3063 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3680 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:44,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3680 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:34:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33852 states. [2023-03-31 23:34:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33852 to 33576. [2023-03-31 23:34:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33576 states, 25836 states have (on average 1.688651494039325) internal successors, (43628), 26898 states have internal predecessors, (43628), 5165 states have call successors, (5165), 2002 states have call predecessors, (5165), 2574 states have return successors, (10243), 5069 states have call predecessors, (10243), 5127 states have call successors, (10243) [2023-03-31 23:34:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33576 states to 33576 states and 59036 transitions. [2023-03-31 23:34:46,156 INFO L78 Accepts]: Start accepts. Automaton has 33576 states and 59036 transitions. Word has length 213 [2023-03-31 23:34:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:46,156 INFO L495 AbstractCegarLoop]: Abstraction has 33576 states and 59036 transitions. [2023-03-31 23:34:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (39), 4 states have call predecessors, (39), 1 states have call successors, (39) [2023-03-31 23:34:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 33576 states and 59036 transitions. [2023-03-31 23:34:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2023-03-31 23:34:46,165 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:46,165 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:46,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:34:46,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-03-31 23:34:46,375 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:46,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1297420831, now seen corresponding path program 1 times [2023-03-31 23:34:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:46,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438381464] [2023-03-31 23:34:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:46,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-03-31 23:34:46,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:46,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438381464] [2023-03-31 23:34:46,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438381464] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:34:46,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624020395] [2023-03-31 23:34:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:46,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:46,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:34:46,863 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) [2023-03-31 23:34:46,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:34:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:47,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 3881 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:34:47,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:34:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-03-31 23:34:47,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:34:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624020395] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:47,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:34:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-03-31 23:34:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445605007] [2023-03-31 23:34:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:47,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:34:47,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:34:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:34:47,661 INFO L87 Difference]: Start difference. First operand 33576 states and 59036 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 2 states have call predecessors, (41), 1 states have call successors, (41) [2023-03-31 23:34:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:49,036 INFO L93 Difference]: Finished difference Result 67358 states and 120580 transitions. [2023-03-31 23:34:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:34:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 2 states have call predecessors, (41), 1 states have call successors, (41) Word has length 339 [2023-03-31 23:34:49,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:49,154 INFO L225 Difference]: With dead ends: 67358 [2023-03-31 23:34:49,154 INFO L226 Difference]: Without dead ends: 33824 [2023-03-31 23:34:49,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:34:49,218 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 19 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:49,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1193 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:34:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33824 states. [2023-03-31 23:34:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33824 to 33806. [2023-03-31 23:34:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33806 states, 26056 states have (on average 1.6877494626957323) internal successors, (43976), 27200 states have internal predecessors, (43976), 5151 states have call successors, (5151), 2002 states have call predecessors, (5151), 2598 states have return successors, (7805), 4997 states have call predecessors, (7805), 5113 states have call successors, (7805) [2023-03-31 23:34:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33806 states to 33806 states and 56932 transitions. [2023-03-31 23:34:50,763 INFO L78 Accepts]: Start accepts. Automaton has 33806 states and 56932 transitions. Word has length 339 [2023-03-31 23:34:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:50,764 INFO L495 AbstractCegarLoop]: Abstraction has 33806 states and 56932 transitions. [2023-03-31 23:34:50,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 2 states have call predecessors, (41), 1 states have call successors, (41) [2023-03-31 23:34:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 33806 states and 56932 transitions. [2023-03-31 23:34:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-03-31 23:34:50,770 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:50,770 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:50,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:34:50,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-03-31 23:34:50,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:50,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:50,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1185641351, now seen corresponding path program 1 times [2023-03-31 23:34:50,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:50,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993546537] [2023-03-31 23:34:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:50,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-03-31 23:34:51,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:51,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993546537] [2023-03-31 23:34:51,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993546537] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:34:51,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755173856] [2023-03-31 23:34:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:51,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:34:51,470 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) [2023-03-31 23:34:51,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process