/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:46:43,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:46:43,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:46:43,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:46:43,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:46:43,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:46:43,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:46:43,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:46:43,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:46:43,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:46:43,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:46:43,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:46:43,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:46:43,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:46:43,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:46:43,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:46:43,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:46:43,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:46:43,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:46:43,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:46:43,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:46:43,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:46:43,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:46:43,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:46:43,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:46:43,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:46:43,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:46:43,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:46:43,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:46:43,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:46:43,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:46:43,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:46:43,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:46:43,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:46:43,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:46:43,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:46:43,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:46:43,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:46:43,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:46:43,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:46:43,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:46:43,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 23:46:43,109 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:46:43,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:46:43,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:46:43,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:46:43,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:46:43,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:46:43,111 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:46:43,111 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:46:43,112 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:46:43,112 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:46:43,112 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:46:43,113 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:46:43,113 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:46:43,113 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:46:43,113 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:46:43,113 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:46:43,113 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:46:43,113 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:46:43,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:46:43,114 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:46:43,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:46:43,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:46:43,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:46:43,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:46:43,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:46:43,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:46:43,115 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:46:43,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:46:43,115 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:46:43,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:46:43,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:46:43,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:46:43,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:46:43,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:46:43,116 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:46:43,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:46:43,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:46:43,116 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:46:43,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:46:43,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:46:43,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:46:43,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:46:43,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:46:43,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:46:43,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:46:43,372 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:46:43,373 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:46:43,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2023-04-02 23:46:44,565 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:46:44,865 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:46:44,865 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2023-04-02 23:46:44,890 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/275e23d05/f9984116997f420a87d69fd328a5188d/FLAGe278697e3 [2023-04-02 23:46:44,904 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/275e23d05/f9984116997f420a87d69fd328a5188d [2023-04-02 23:46:44,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:46:44,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:46:44,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:46:44,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:46:44,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:46:44,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:46:44" (1/1) ... [2023-04-02 23:46:44,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676743e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:44, skipping insertion in model container [2023-04-02 23:46:44,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:46:44" (1/1) ... [2023-04-02 23:46:44,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:46:44,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:46:45,136 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] [2023-04-02 23:46:45,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:46:45,469 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:46:45,479 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] [2023-04-02 23:46:45,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:46:45,608 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:46:45,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45 WrapperNode [2023-04-02 23:46:45,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:46:45,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:46:45,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:46:45,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:46:45,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (1/1) ... [2023-04-02 23:46:45,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (1/1) ... [2023-04-02 23:46:45,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (1/1) ... [2023-04-02 23:46:45,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (1/1) ... [2023-04-02 23:46:45,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (1/1) ... [2023-04-02 23:46:45,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (1/1) ... [2023-04-02 23:46:45,732 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (1/1) ... [2023-04-02 23:46:45,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (1/1) ... [2023-04-02 23:46:45,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:46:45,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:46:45,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:46:45,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:46:45,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (1/1) ... [2023-04-02 23:46:45,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:46:45,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:46:45,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 23:46:45,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 23:46:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:46:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:46:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:46:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:46:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:46:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:46:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:46:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:46:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:46:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:46:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:46:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:46:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:46:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:46:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:46:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:46:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:46:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:46:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:46:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:46:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:46:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:46:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:46:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:46:45,859 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:46:45,859 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:46:45,859 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:46:45,859 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:46:45,860 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:46:45,860 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:46:45,860 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:46:45,860 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:46:45,860 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:46:45,860 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:46:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:46:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:46:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:46:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:46:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:46:45,862 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:46:45,862 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:46:45,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:46:45,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:46:45,863 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:46:45,864 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:46:45,864 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:46:45,864 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:46:45,864 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:46:45,864 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:46:45,865 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:46:45,865 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:46:45,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:46:45,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:46:45,865 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:46:45,865 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:46:45,866 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:46:45,866 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:46:45,866 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:46:45,866 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:46:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:46:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:46:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:46:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:46:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:46:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:46:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:46:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:46:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:46:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:46:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:46:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:46:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:46:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:46:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:46:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:46:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:46:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:46:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:46:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:46:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:46:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:46:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:46:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:46:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:46:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:46:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:46:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:46:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:46:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:46:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:46:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:46:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:46:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:46:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:46:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:46:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:46:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:46:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:46:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:46:46,115 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:46:46,118 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:46:47,423 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:46:48,242 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:46:48,244 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:46:48,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:46:48 BoogieIcfgContainer [2023-04-02 23:46:48,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:46:48,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:46:48,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:46:48,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:46:48,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:46:44" (1/3) ... [2023-04-02 23:46:48,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fdb7b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:46:48, skipping insertion in model container [2023-04-02 23:46:48,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:45" (2/3) ... [2023-04-02 23:46:48,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fdb7b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:46:48, skipping insertion in model container [2023-04-02 23:46:48,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:46:48" (3/3) ... [2023-04-02 23:46:48,257 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product11.cil.c [2023-04-02 23:46:48,273 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:46:48,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:46:48,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:46:48,383 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;@4f64b702, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:46:48,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:46:48,392 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) [2023-04-02 23:46:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:46:48,420 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:48,421 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:48,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:48,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:48,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1754782928, now seen corresponding path program 1 times [2023-04-02 23:46:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:48,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364141928] [2023-04-02 23:46:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:46:48,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364141928] [2023-04-02 23:46:48,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364141928] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:48,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:48,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:46:48,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248125536] [2023-04-02 23:46:48,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:48,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:46:48,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:46:48,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:46:48,987 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) [2023-04-02 23:46:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:49,111 INFO L93 Difference]: Finished difference Result 467 states and 697 transitions. [2023-04-02 23:46:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:46:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 112 [2023-04-02 23:46:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:49,137 INFO L225 Difference]: With dead ends: 467 [2023-04-02 23:46:49,137 INFO L226 Difference]: Without dead ends: 433 [2023-04-02 23:46:49,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:46:49,143 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 [2023-04-02 23:46:49,144 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] [2023-04-02 23:46:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-04-02 23:46:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2023-04-02 23:46:49,219 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) [2023-04-02 23:46:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 646 transitions. [2023-04-02 23:46:49,229 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 646 transitions. Word has length 112 [2023-04-02 23:46:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:49,230 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 646 transitions. [2023-04-02 23:46:49,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2023-04-02 23:46:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 646 transitions. [2023-04-02 23:46:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-02 23:46:49,239 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:49,240 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:49,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:46:49,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:49,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2100351780, now seen corresponding path program 1 times [2023-04-02 23:46:49,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:49,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542620011] [2023-04-02 23:46:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:49,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:46:50,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:50,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542620011] [2023-04-02 23:46:50,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542620011] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:50,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:50,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:46:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986031346] [2023-04-02 23:46:50,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:50,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:46:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:46:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:46:50,056 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) [2023-04-02 23:46:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:52,427 INFO L93 Difference]: Finished difference Result 1226 states and 1875 transitions. [2023-04-02 23:46:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:46:52,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 113 [2023-04-02 23:46:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:52,433 INFO L225 Difference]: With dead ends: 1226 [2023-04-02 23:46:52,433 INFO L226 Difference]: Without dead ends: 835 [2023-04-02 23:46:52,436 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 [2023-04-02 23:46:52,437 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1212 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:52,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 502 Invalid, 3706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 3270 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-02 23:46:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-04-02 23:46:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 810. [2023-04-02 23:46:52,514 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) [2023-04-02 23:46:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1235 transitions. [2023-04-02 23:46:52,519 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1235 transitions. Word has length 113 [2023-04-02 23:46:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:52,520 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1235 transitions. [2023-04-02 23:46:52,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:46:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1235 transitions. [2023-04-02 23:46:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-02 23:46:52,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:52,528 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:52,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:46:52,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:52,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash 652637344, now seen corresponding path program 1 times [2023-04-02 23:46:52,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:52,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218685745] [2023-04-02 23:46:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:52,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:46:52,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:52,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218685745] [2023-04-02 23:46:52,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218685745] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:52,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:52,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:46:52,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990689017] [2023-04-02 23:46:52,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:52,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:46:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:46:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:46:52,840 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) [2023-04-02 23:46:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:53,328 INFO L93 Difference]: Finished difference Result 849 states and 1291 transitions. [2023-04-02 23:46:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:53,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2023-04-02 23:46:53,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:53,333 INFO L225 Difference]: With dead ends: 849 [2023-04-02 23:46:53,333 INFO L226 Difference]: Without dead ends: 832 [2023-04-02 23:46:53,334 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 [2023-04-02 23:46:53,335 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 662 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:53,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1599 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:46:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2023-04-02 23:46:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 814. [2023-04-02 23:46:53,371 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) [2023-04-02 23:46:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1239 transitions. [2023-04-02 23:46:53,376 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1239 transitions. Word has length 117 [2023-04-02 23:46:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:53,377 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1239 transitions. [2023-04-02 23:46:53,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:46:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1239 transitions. [2023-04-02 23:46:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 23:46:53,379 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:53,379 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:53,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:46:53,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:53,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:53,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1730342453, now seen corresponding path program 1 times [2023-04-02 23:46:53,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:53,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035365028] [2023-04-02 23:46:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:53,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:46:53,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:53,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035365028] [2023-04-02 23:46:53,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035365028] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:53,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:53,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:46:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422712546] [2023-04-02 23:46:53,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:53,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:46:53,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:46:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:46:53,746 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) [2023-04-02 23:46:53,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:53,945 INFO L93 Difference]: Finished difference Result 835 states and 1265 transitions. [2023-04-02 23:46:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:46:53,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) Word has length 122 [2023-04-02 23:46:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:53,950 INFO L225 Difference]: With dead ends: 835 [2023-04-02 23:46:53,951 INFO L226 Difference]: Without dead ends: 818 [2023-04-02 23:46:53,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:46:53,958 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 [2023-04-02 23:46:53,959 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] [2023-04-02 23:46:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2023-04-02 23:46:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 814. [2023-04-02 23:46:53,999 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) [2023-04-02 23:46:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1237 transitions. [2023-04-02 23:46:54,004 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1237 transitions. Word has length 122 [2023-04-02 23:46:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:54,006 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1237 transitions. [2023-04-02 23:46:54,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-04-02 23:46:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1237 transitions. [2023-04-02 23:46:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 23:46:54,009 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:54,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:54,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:46:54,010 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:54,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:54,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1240685095, now seen corresponding path program 1 times [2023-04-02 23:46:54,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:54,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164434884] [2023-04-02 23:46:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:54,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:46:54,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:54,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164434884] [2023-04-02 23:46:54,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164434884] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:54,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:54,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:46:54,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476508710] [2023-04-02 23:46:54,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:54,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:46:54,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:46:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:46:54,405 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) [2023-04-02 23:46:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:55,867 INFO L93 Difference]: Finished difference Result 2434 states and 3792 transitions. [2023-04-02 23:46:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:55,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 137 [2023-04-02 23:46:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:55,879 INFO L225 Difference]: With dead ends: 2434 [2023-04-02 23:46:55,879 INFO L226 Difference]: Without dead ends: 1662 [2023-04-02 23:46:55,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:46:55,883 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1219 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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 [2023-04-02 23:46:55,883 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] [2023-04-02 23:46:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2023-04-02 23:46:55,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1564. [2023-04-02 23:46:55,985 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) [2023-04-02 23:46:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2423 transitions. [2023-04-02 23:46:55,998 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2423 transitions. Word has length 137 [2023-04-02 23:46:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:55,999 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2423 transitions. [2023-04-02 23:46:56,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:46:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2423 transitions. [2023-04-02 23:46:56,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 23:46:56,003 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:56,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:56,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:46:56,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:56,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash 192159624, now seen corresponding path program 1 times [2023-04-02 23:46:56,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:56,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687989379] [2023-04-02 23:46:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:56,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:46:56,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:56,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687989379] [2023-04-02 23:46:56,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687989379] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:56,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:56,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:46:56,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202378043] [2023-04-02 23:46:56,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:56,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:46:56,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:46:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:46:56,302 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) [2023-04-02 23:46:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:57,839 INFO L93 Difference]: Finished difference Result 4629 states and 7328 transitions. [2023-04-02 23:46:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 138 [2023-04-02 23:46:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:57,862 INFO L225 Difference]: With dead ends: 4629 [2023-04-02 23:46:57,863 INFO L226 Difference]: Without dead ends: 3110 [2023-04-02 23:46:57,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:46:57,872 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1215 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:57,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 512 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:46:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2023-04-02 23:46:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2989. [2023-04-02 23:46:58,094 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) [2023-04-02 23:46:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 4696 transitions. [2023-04-02 23:46:58,116 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 4696 transitions. Word has length 138 [2023-04-02 23:46:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:58,116 INFO L495 AbstractCegarLoop]: Abstraction has 2989 states and 4696 transitions. [2023-04-02 23:46:58,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:46:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 4696 transitions. [2023-04-02 23:46:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-02 23:46:58,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:58,119 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:58,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:46:58,119 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:58,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:58,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1660676859, now seen corresponding path program 1 times [2023-04-02 23:46:58,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:58,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131346514] [2023-04-02 23:46:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:58,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:46:58,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:58,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131346514] [2023-04-02 23:46:58,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131346514] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:58,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:58,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:46:58,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530393232] [2023-04-02 23:46:58,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:58,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:46:58,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:58,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:46:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:46:58,448 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) [2023-04-02 23:47:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:00,083 INFO L93 Difference]: Finished difference Result 8952 states and 14476 transitions. [2023-04-02 23:47:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 139 [2023-04-02 23:47:00,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:00,127 INFO L225 Difference]: With dead ends: 8952 [2023-04-02 23:47:00,127 INFO L226 Difference]: Without dead ends: 6014 [2023-04-02 23:47:00,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:47:00,144 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1212 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:00,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 517 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:47:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2023-04-02 23:47:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 5848. [2023-04-02 23:47:00,601 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) [2023-04-02 23:47:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5848 states to 5848 states and 9358 transitions. [2023-04-02 23:47:00,630 INFO L78 Accepts]: Start accepts. Automaton has 5848 states and 9358 transitions. Word has length 139 [2023-04-02 23:47:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:00,631 INFO L495 AbstractCegarLoop]: Abstraction has 5848 states and 9358 transitions. [2023-04-02 23:47:00,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:47:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5848 states and 9358 transitions. [2023-04-02 23:47:00,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-02 23:47:00,634 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:00,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:47:00,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:47:00,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:00,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash -59925206, now seen corresponding path program 1 times [2023-04-02 23:47:00,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:00,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87622860] [2023-04-02 23:47:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:00,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:47:01,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:01,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87622860] [2023-04-02 23:47:01,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87622860] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:01,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:47:01,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:47:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717426212] [2023-04-02 23:47:01,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:01,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:47:01,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:47:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:47:01,038 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) [2023-04-02 23:47:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:02,953 INFO L93 Difference]: Finished difference Result 17623 states and 29503 transitions. [2023-04-02 23:47:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:02,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 140 [2023-04-02 23:47:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:03,035 INFO L225 Difference]: With dead ends: 17623 [2023-04-02 23:47:03,036 INFO L226 Difference]: Without dead ends: 11838 [2023-04-02 23:47:03,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:47:03,070 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1209 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:03,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 522 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:47:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11838 states. [2023-04-02 23:47:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11838 to 11583. [2023-04-02 23:47:04,154 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) [2023-04-02 23:47:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11583 states to 11583 states and 19092 transitions. [2023-04-02 23:47:04,208 INFO L78 Accepts]: Start accepts. Automaton has 11583 states and 19092 transitions. Word has length 140 [2023-04-02 23:47:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:04,208 INFO L495 AbstractCegarLoop]: Abstraction has 11583 states and 19092 transitions. [2023-04-02 23:47:04,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:47:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 11583 states and 19092 transitions. [2023-04-02 23:47:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-02 23:47:04,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:04,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:47:04,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:47:04,213 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:04,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:04,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1858977763, now seen corresponding path program 1 times [2023-04-02 23:47:04,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:04,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367350538] [2023-04-02 23:47:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:04,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:47:04,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:04,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367350538] [2023-04-02 23:47:04,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367350538] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:04,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:47:04,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:47:04,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103425469] [2023-04-02 23:47:04,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:04,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:47:04,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:47:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:47:04,506 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) [2023-04-02 23:47:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:07,114 INFO L93 Difference]: Finished difference Result 35042 states and 62199 transitions. [2023-04-02 23:47:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:07,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 141 [2023-04-02 23:47:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:07,282 INFO L225 Difference]: With dead ends: 35042 [2023-04-02 23:47:07,285 INFO L226 Difference]: Without dead ends: 23534 [2023-04-02 23:47:07,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:47:07,351 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1206 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:07,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 528 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:47:07,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23534 states. [2023-04-02 23:47:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23534 to 22948. [2023-04-02 23:47:09,316 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) [2023-04-02 23:47:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22948 states to 22948 states and 39461 transitions. [2023-04-02 23:47:09,428 INFO L78 Accepts]: Start accepts. Automaton has 22948 states and 39461 transitions. Word has length 141 [2023-04-02 23:47:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:09,429 INFO L495 AbstractCegarLoop]: Abstraction has 22948 states and 39461 transitions. [2023-04-02 23:47:09,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:47:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 22948 states and 39461 transitions. [2023-04-02 23:47:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-04-02 23:47:09,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:09,438 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] [2023-04-02 23:47:09,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:47:09,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:09,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1582259276, now seen corresponding path program 1 times [2023-04-02 23:47:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:09,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282496837] [2023-04-02 23:47:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:09,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 23:47:09,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:09,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282496837] [2023-04-02 23:47:09,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282496837] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:09,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:47:09,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:47:09,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854176796] [2023-04-02 23:47:09,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:09,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:47:09,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:09,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:47:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:47:09,663 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) [2023-04-02 23:47:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:11,777 INFO L93 Difference]: Finished difference Result 46275 states and 82613 transitions. [2023-04-02 23:47:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:11,777 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 [2023-04-02 23:47:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:11,894 INFO L225 Difference]: With dead ends: 46275 [2023-04-02 23:47:11,894 INFO L226 Difference]: Without dead ends: 23370 [2023-04-02 23:47:11,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:47:11,955 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 [2023-04-02 23:47:11,955 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] [2023-04-02 23:47:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23370 states. [2023-04-02 23:47:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23370 to 23220. [2023-04-02 23:47:13,500 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) [2023-04-02 23:47:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23220 states to 23220 states and 39976 transitions. [2023-04-02 23:47:13,618 INFO L78 Accepts]: Start accepts. Automaton has 23220 states and 39976 transitions. Word has length 194 [2023-04-02 23:47:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:13,618 INFO L495 AbstractCegarLoop]: Abstraction has 23220 states and 39976 transitions. [2023-04-02 23:47:13,619 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) [2023-04-02 23:47:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 23220 states and 39976 transitions. [2023-04-02 23:47:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-02 23:47:13,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:13,628 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] [2023-04-02 23:47:13,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:47:13,629 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:13,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash -936209325, now seen corresponding path program 1 times [2023-04-02 23:47:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:13,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334781674] [2023-04-02 23:47:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:13,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 23:47:13,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:13,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334781674] [2023-04-02 23:47:13,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334781674] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:13,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688491020] [2023-04-02 23:47:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:13,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:13,968 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:47:13,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:47:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:14,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 3078 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:47:14,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-02 23:47:14,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:14,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688491020] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:14,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:14,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:47:14,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210881033] [2023-04-02 23:47:14,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:14,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:47:14,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:47:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:47:14,689 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) [2023-04-02 23:47:16,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:16,662 INFO L93 Difference]: Finished difference Result 48893 states and 87640 transitions. [2023-04-02 23:47:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:16,662 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 [2023-04-02 23:47:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:16,823 INFO L225 Difference]: With dead ends: 48893 [2023-04-02 23:47:16,823 INFO L226 Difference]: Without dead ends: 25716 [2023-04-02 23:47:16,897 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 [2023-04-02 23:47:16,898 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 213 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:16,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1605 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:47:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25716 states. [2023-04-02 23:47:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25716 to 25716. [2023-04-02 23:47:18,728 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) [2023-04-02 23:47:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25716 states to 25716 states and 44648 transitions. [2023-04-02 23:47:18,845 INFO L78 Accepts]: Start accepts. Automaton has 25716 states and 44648 transitions. Word has length 199 [2023-04-02 23:47:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:18,845 INFO L495 AbstractCegarLoop]: Abstraction has 25716 states and 44648 transitions. [2023-04-02 23:47:18,845 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) [2023-04-02 23:47:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 25716 states and 44648 transitions. [2023-04-02 23:47:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-04-02 23:47:18,855 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:18,855 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] [2023-04-02 23:47:18,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:47:19,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 23:47:19,065 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:19,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash -719841288, now seen corresponding path program 1 times [2023-04-02 23:47:19,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:19,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244130925] [2023-04-02 23:47:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:19,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 23:47:19,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:19,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244130925] [2023-04-02 23:47:19,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244130925] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:19,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180804896] [2023-04-02 23:47:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:19,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:19,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:19,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:47:19,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:47:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:20,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 3083 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:47:20,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-02 23:47:20,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:20,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180804896] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:20,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:20,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:47:20,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176585125] [2023-04-02 23:47:20,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:20,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:47:20,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:47:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:47:20,148 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) [2023-04-02 23:47:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:21,881 INFO L93 Difference]: Finished difference Result 53885 states and 96918 transitions. [2023-04-02 23:47:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:21,881 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 [2023-04-02 23:47:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:21,991 INFO L225 Difference]: With dead ends: 53885 [2023-04-02 23:47:21,991 INFO L226 Difference]: Without dead ends: 28212 [2023-04-02 23:47:22,050 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 [2023-04-02 23:47:22,051 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 [2023-04-02 23:47:22,051 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] [2023-04-02 23:47:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28212 states. [2023-04-02 23:47:23,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28212 to 28212. [2023-04-02 23:47:23,448 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) [2023-04-02 23:47:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28212 states to 28212 states and 49320 transitions. [2023-04-02 23:47:23,570 INFO L78 Accepts]: Start accepts. Automaton has 28212 states and 49320 transitions. Word has length 204 [2023-04-02 23:47:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:23,570 INFO L495 AbstractCegarLoop]: Abstraction has 28212 states and 49320 transitions. [2023-04-02 23:47:23,570 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) [2023-04-02 23:47:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 28212 states and 49320 transitions. [2023-04-02 23:47:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-04-02 23:47:23,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:23,580 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] [2023-04-02 23:47:23,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:47:23,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 23:47:23,795 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:23,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:23,795 INFO L85 PathProgramCache]: Analyzing trace with hash -76063304, now seen corresponding path program 1 times [2023-04-02 23:47:23,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:23,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899489864] [2023-04-02 23:47:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:23,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-02 23:47:24,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:24,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899489864] [2023-04-02 23:47:24,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899489864] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:24,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697512912] [2023-04-02 23:47:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:24,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:24,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:24,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:47:24,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:47:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:24,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 3087 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:47:24,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 23:47:24,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:24,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697512912] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:24,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:24,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:47:24,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072756966] [2023-04-02 23:47:24,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:24,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:47:24,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:47:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:47:24,570 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) [2023-04-02 23:47:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:26,230 INFO L93 Difference]: Finished difference Result 58877 states and 106196 transitions. [2023-04-02 23:47:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:26,230 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 [2023-04-02 23:47:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:26,376 INFO L225 Difference]: With dead ends: 58877 [2023-04-02 23:47:26,376 INFO L226 Difference]: Without dead ends: 30708 [2023-04-02 23:47:26,451 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 [2023-04-02 23:47:26,452 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 [2023-04-02 23:47:26,452 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] [2023-04-02 23:47:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30708 states. [2023-04-02 23:47:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30708 to 30708. [2023-04-02 23:47:27,824 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) [2023-04-02 23:47:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30708 states to 30708 states and 53992 transitions. [2023-04-02 23:47:27,921 INFO L78 Accepts]: Start accepts. Automaton has 30708 states and 53992 transitions. Word has length 208 [2023-04-02 23:47:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:27,922 INFO L495 AbstractCegarLoop]: Abstraction has 30708 states and 53992 transitions. [2023-04-02 23:47:27,922 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) [2023-04-02 23:47:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 30708 states and 53992 transitions. [2023-04-02 23:47:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-04-02 23:47:27,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:27,933 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] [2023-04-02 23:47:27,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:47:28,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:28,144 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:28,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:28,144 INFO L85 PathProgramCache]: Analyzing trace with hash 162275059, now seen corresponding path program 1 times [2023-04-02 23:47:28,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:28,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829640041] [2023-04-02 23:47:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:28,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 23:47:28,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:28,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829640041] [2023-04-02 23:47:28,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829640041] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:28,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337087592] [2023-04-02 23:47:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:28,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:28,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:28,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:47:28,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:47:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:29,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 3090 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:47:29,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 23:47:29,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:29,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337087592] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:29,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:29,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:47:29,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294854829] [2023-04-02 23:47:29,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:29,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:47:29,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:29,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:47:29,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:47:29,250 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) [2023-04-02 23:47:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:30,735 INFO L93 Difference]: Finished difference Result 63869 states and 115474 transitions. [2023-04-02 23:47:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:30,736 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 [2023-04-02 23:47:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:30,844 INFO L225 Difference]: With dead ends: 63869 [2023-04-02 23:47:30,844 INFO L226 Difference]: Without dead ends: 33204 [2023-04-02 23:47:30,902 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 [2023-04-02 23:47:30,903 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 [2023-04-02 23:47:30,903 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] [2023-04-02 23:47:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33204 states. [2023-04-02 23:47:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33204 to 33204. [2023-04-02 23:47:32,366 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) [2023-04-02 23:47:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33204 states to 33204 states and 58664 transitions. [2023-04-02 23:47:32,460 INFO L78 Accepts]: Start accepts. Automaton has 33204 states and 58664 transitions. Word has length 211 [2023-04-02 23:47:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:32,460 INFO L495 AbstractCegarLoop]: Abstraction has 33204 states and 58664 transitions. [2023-04-02 23:47:32,461 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) [2023-04-02 23:47:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 33204 states and 58664 transitions. [2023-04-02 23:47:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-04-02 23:47:32,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:32,470 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] [2023-04-02 23:47:32,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 23:47:32,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:32,680 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:32,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash -8321243, now seen corresponding path program 1 times [2023-04-02 23:47:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599556335] [2023-04-02 23:47:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:32,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 23:47:33,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:33,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599556335] [2023-04-02 23:47:33,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599556335] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:33,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053205998] [2023-04-02 23:47:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:33,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:33,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:33,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:47:33,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:47:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:33,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 23:47:33,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-02 23:47:34,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:34,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053205998] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:34,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:34,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-04-02 23:47:34,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102463997] [2023-04-02 23:47:34,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:34,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:47:34,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:34,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:47:34,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:47:34,034 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) [2023-04-02 23:47:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:35,192 INFO L93 Difference]: Finished difference Result 34071 states and 59717 transitions. [2023-04-02 23:47:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:47:35,193 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 [2023-04-02 23:47:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:35,299 INFO L225 Difference]: With dead ends: 34071 [2023-04-02 23:47:35,300 INFO L226 Difference]: Without dead ends: 33852 [2023-04-02 23:47:35,319 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 [2023-04-02 23:47:35,319 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 [2023-04-02 23:47:35,319 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] [2023-04-02 23:47:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33852 states. [2023-04-02 23:47:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33852 to 33576. [2023-04-02 23:47:36,679 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) [2023-04-02 23:47:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33576 states to 33576 states and 59036 transitions. [2023-04-02 23:47:36,767 INFO L78 Accepts]: Start accepts. Automaton has 33576 states and 59036 transitions. Word has length 213 [2023-04-02 23:47:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:36,767 INFO L495 AbstractCegarLoop]: Abstraction has 33576 states and 59036 transitions. [2023-04-02 23:47:36,768 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) [2023-04-02 23:47:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 33576 states and 59036 transitions. [2023-04-02 23:47:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-02 23:47:36,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:36,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:47:36,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:47:36,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 23:47:36,993 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:36,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:36,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1961497185, now seen corresponding path program 1 times [2023-04-02 23:47:36,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:36,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299547927] [2023-04-02 23:47:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:36,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-04-02 23:47:37,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:37,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299547927] [2023-04-02 23:47:37,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299547927] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:37,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596310502] [2023-04-02 23:47:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:37,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:37,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:37,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:47:37,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:47:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:38,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 3878 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:47:38,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2023-04-02 23:47:38,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:38,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596310502] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:38,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:38,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-02 23:47:38,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029825395] [2023-04-02 23:47:38,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:38,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:47:38,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:47:38,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:47:38,346 INFO L87 Difference]: Start difference. First operand 33576 states and 59036 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2023-04-02 23:47:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:39,781 INFO L93 Difference]: Finished difference Result 67396 states and 121023 transitions. [2023-04-02 23:47:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:47:39,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 338 [2023-04-02 23:47:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:40,049 INFO L225 Difference]: With dead ends: 67396 [2023-04-02 23:47:40,049 INFO L226 Difference]: Without dead ends: 33862 [2023-04-02 23:47:40,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:47:40,097 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 24 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1187 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 [2023-04-02 23:47:40,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1187 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:47:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33862 states. [2023-04-02 23:47:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33862 to 33843. [2023-04-02 23:47:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33843 states, 26084 states have (on average 1.689464806011348) internal successors, (44068), 27222 states have internal predecessors, (44068), 5150 states have call successors, (5150), 2002 states have call predecessors, (5150), 2608 states have return successors, (8655), 5012 states have call predecessors, (8655), 5112 states have call successors, (8655) [2023-04-02 23:47:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33843 states to 33843 states and 57873 transitions. [2023-04-02 23:47:41,584 INFO L78 Accepts]: Start accepts. Automaton has 33843 states and 57873 transitions. Word has length 338 [2023-04-02 23:47:41,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:41,585 INFO L495 AbstractCegarLoop]: Abstraction has 33843 states and 57873 transitions. [2023-04-02 23:47:41,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2023-04-02 23:47:41,585 INFO L276 IsEmpty]: Start isEmpty. Operand 33843 states and 57873 transitions. [2023-04-02 23:47:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-04-02 23:47:41,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:41,593 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] [2023-04-02 23:47:41,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 23:47:41,803 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 [2023-04-02 23:47:41,804 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:41,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1185641351, now seen corresponding path program 1 times [2023-04-02 23:47:41,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:41,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480417348] [2023-04-02 23:47:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:41,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-04-02 23:47:42,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:42,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480417348] [2023-04-02 23:47:42,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480417348] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:42,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006395884] [2023-04-02 23:47:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:42,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:42,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:42,476 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:47:42,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:47:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:43,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 3872 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:47:43,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-04-02 23:47:43,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:47:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-04-02 23:47:44,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006395884] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:47:44,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253299366] [2023-04-02 23:47:44,229 INFO L159 IcfgInterpreter]: Started Sifa with 179 locations of interest [2023-04-02 23:47:44,229 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:47:44,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:47:44,237 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:47:44,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:47:46,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 181 for LOIs [2023-04-02 23:47:47,071 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 235 for LOIs [2023-04-02 23:47:49,658 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 235 for LOIs [2023-04-02 23:47:53,821 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...