/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_spec9_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:38:05,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:38:05,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:38:05,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:38:05,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:38:05,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:38:05,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:38:05,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:38:05,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:38:05,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:38:05,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:38:05,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:38:05,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:38:05,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:38:05,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:38:05,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:38:05,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:38:05,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:38:05,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:38:05,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:38:05,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:38:05,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:38:05,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:38:05,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:38:05,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:38:05,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:38:05,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:38:05,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:38:05,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:38:05,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:38:05,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:38:05,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:38:05,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:38:05,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:38:05,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:38:05,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:38:05,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:38:05,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:38:05,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:38:05,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:38:05,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:38:05,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:38:05,159 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:38:05,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:38:05,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:38:05,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:38:05,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:38:05,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:38:05,160 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:38:05,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:38:05,164 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:38:05,164 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:38:05,165 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:38:05,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:38:05,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:38:05,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:38:05,165 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:38:05,165 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:38:05,165 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:38:05,165 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:38:05,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:38:05,166 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:38:05,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:38:05,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:38:05,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:38:05,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:38:05,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:38:05,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:38:05,167 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:38:05,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:38:05,167 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:38:05,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:38:05,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:38:05,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:38:05,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:38:05,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:38:05,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:38:05,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:38:05,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:38:05,168 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:38:05,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:38:05,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:38:05,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:38:05,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:38:05,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:38:05,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:38:05,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:38:05,350 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:38:05,350 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:38:05,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2023-04-01 05:38:06,382 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:38:06,591 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:38:06,592 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2023-04-01 05:38:06,612 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/804a99914/a0b2d8b6e2e94dc5b9abe9bad9ad38fe/FLAGe19d6ee7e [2023-04-01 05:38:06,623 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/804a99914/a0b2d8b6e2e94dc5b9abe9bad9ad38fe [2023-04-01 05:38:06,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:38:06,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:38:06,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:38:06,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:38:06,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:38:06,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:38:06" (1/1) ... [2023-04-01 05:38:06,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1168ff81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:06, skipping insertion in model container [2023-04-01 05:38:06,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:38:06" (1/1) ... [2023-04-01 05:38:06,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:38:06,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:38:07,007 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_spec9_product09.cil.c[70349,70362] [2023-04-01 05:38:07,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:38:07,027 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:38:07,114 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_spec9_product09.cil.c[70349,70362] [2023-04-01 05:38:07,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:38:07,149 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:38:07,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07 WrapperNode [2023-04-01 05:38:07,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:38:07,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:38:07,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:38:07,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:38:07,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (1/1) ... [2023-04-01 05:38:07,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (1/1) ... [2023-04-01 05:38:07,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (1/1) ... [2023-04-01 05:38:07,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (1/1) ... [2023-04-01 05:38:07,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (1/1) ... [2023-04-01 05:38:07,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (1/1) ... [2023-04-01 05:38:07,262 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (1/1) ... [2023-04-01 05:38:07,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (1/1) ... [2023-04-01 05:38:07,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:38:07,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:38:07,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:38:07,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:38:07,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (1/1) ... [2023-04-01 05:38:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:38:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:07,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:38:07,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:38:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:38:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:38:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:38:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:38:07,408 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:38:07,408 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 05:38:07,408 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 05:38:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 05:38:07,410 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 05:38:07,411 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 05:38:07,411 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 05:38:07,411 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 05:38:07,411 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 05:38:07,411 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 05:38:07,411 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 05:38:07,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 05:38:07,412 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 05:38:07,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 05:38:07,412 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 05:38:07,412 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 05:38:07,413 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 05:38:07,413 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 05:38:07,413 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:38:07,413 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 05:38:07,413 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 05:38:07,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:38:07,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:38:07,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:38:07,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:38:07,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:38:07,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:38:07,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:38:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:38:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:38:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:38:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:38:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:38:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:38:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 05:38:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:38:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:38:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 05:38:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 05:38:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 05:38:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 05:38:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 05:38:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 05:38:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 05:38:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 05:38:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:38:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:38:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:38:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:38:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 05:38:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 05:38:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 05:38:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 05:38:07,423 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 05:38:07,423 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 05:38:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 05:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 05:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 05:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 05:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2023-04-01 05:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 05:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 05:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 05:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 05:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 05:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 05:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:38:07,701 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:38:07,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:38:08,771 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:38:09,566 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:38:09,567 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 05:38:09,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:38:09 BoogieIcfgContainer [2023-04-01 05:38:09,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:38:09,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:38:09,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:38:09,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:38:09,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:38:06" (1/3) ... [2023-04-01 05:38:09,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601248f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:38:09, skipping insertion in model container [2023-04-01 05:38:09,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:07" (2/3) ... [2023-04-01 05:38:09,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601248f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:38:09, skipping insertion in model container [2023-04-01 05:38:09,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:38:09" (3/3) ... [2023-04-01 05:38:09,580 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product09.cil.c [2023-04-01 05:38:09,594 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:38:09,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:38:09,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:38:09,658 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;@5629bf95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:38:09,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:38:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 528 states, 309 states have (on average 1.5048543689320388) internal successors, (465), 336 states have internal predecessors, (465), 160 states have call successors, (160), 46 states have call predecessors, (160), 46 states have return successors, (160), 151 states have call predecessors, (160), 160 states have call successors, (160) [2023-04-01 05:38:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 05:38:09,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:09,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:09,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:09,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash -530973204, now seen corresponding path program 1 times [2023-04-01 05:38:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:09,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517812703] [2023-04-01 05:38:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:09,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:38:10,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517812703] [2023-04-01 05:38:10,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517812703] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:10,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:10,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:38:10,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132578874] [2023-04-01 05:38:10,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:10,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:38:10,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:38:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:10,407 INFO L87 Difference]: Start difference. First operand has 528 states, 309 states have (on average 1.5048543689320388) internal successors, (465), 336 states have internal predecessors, (465), 160 states have call successors, (160), 46 states have call predecessors, (160), 46 states have return successors, (160), 151 states have call predecessors, (160), 160 states have call successors, (160) Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-01 05:38:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:10,674 INFO L93 Difference]: Finished difference Result 808 states and 1249 transitions. [2023-04-01 05:38:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:38:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 92 [2023-04-01 05:38:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:10,687 INFO L225 Difference]: With dead ends: 808 [2023-04-01 05:38:10,687 INFO L226 Difference]: Without dead ends: 436 [2023-04-01 05:38:10,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:10,694 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 34 mSDsluCounter, 3492 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 4078 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:10,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 4078 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:38:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-04-01 05:38:10,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 401. [2023-04-01 05:38:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 256 states have (on average 1.546875) internal successors, (396), 275 states have internal predecessors, (396), 105 states have call successors, (105), 42 states have call predecessors, (105), 39 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2023-04-01 05:38:10,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 599 transitions. [2023-04-01 05:38:10,748 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 599 transitions. Word has length 92 [2023-04-01 05:38:10,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:10,748 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 599 transitions. [2023-04-01 05:38:10,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-01 05:38:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 599 transitions. [2023-04-01 05:38:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 05:38:10,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:10,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:10,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:38:10,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:10,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:10,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1804946468, now seen corresponding path program 1 times [2023-04-01 05:38:10,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:10,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534731581] [2023-04-01 05:38:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:10,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:38:11,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:11,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534731581] [2023-04-01 05:38:11,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534731581] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:11,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:11,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:38:11,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541907813] [2023-04-01 05:38:11,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:11,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:38:11,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:38:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:38:11,195 INFO L87 Difference]: Start difference. First operand 401 states and 599 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 05:38:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:13,150 INFO L93 Difference]: Finished difference Result 1234 states and 1906 transitions. [2023-04-01 05:38:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 05:38:13,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 97 [2023-04-01 05:38:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:13,160 INFO L225 Difference]: With dead ends: 1234 [2023-04-01 05:38:13,160 INFO L226 Difference]: Without dead ends: 875 [2023-04-01 05:38:13,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-04-01 05:38:13,168 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1655 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:13,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1723 Valid, 606 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 05:38:13,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2023-04-01 05:38:13,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 848. [2023-04-01 05:38:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 570 states have (on average 1.587719298245614) internal successors, (905), 605 states have internal predecessors, (905), 204 states have call successors, (204), 72 states have call predecessors, (204), 73 states have return successors, (204), 194 states have call predecessors, (204), 196 states have call successors, (204) [2023-04-01 05:38:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1313 transitions. [2023-04-01 05:38:13,217 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1313 transitions. Word has length 97 [2023-04-01 05:38:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:13,218 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1313 transitions. [2023-04-01 05:38:13,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 05:38:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1313 transitions. [2023-04-01 05:38:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-01 05:38:13,221 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:13,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:13,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:38:13,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:13,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash -228920113, now seen corresponding path program 1 times [2023-04-01 05:38:13,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:13,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376760387] [2023-04-01 05:38:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:38:13,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376760387] [2023-04-01 05:38:13,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376760387] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:13,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:13,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:38:13,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671181197] [2023-04-01 05:38:13,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:13,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:38:13,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:38:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:38:13,379 INFO L87 Difference]: Start difference. First operand 848 states and 1313 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-01 05:38:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:13,504 INFO L93 Difference]: Finished difference Result 1344 states and 2094 transitions. [2023-04-01 05:38:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:13,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 101 [2023-04-01 05:38:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:13,509 INFO L225 Difference]: With dead ends: 1344 [2023-04-01 05:38:13,509 INFO L226 Difference]: Without dead ends: 870 [2023-04-01 05:38:13,511 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 [2023-04-01 05:38:13,511 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 7 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2220 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:13,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2220 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-04-01 05:38:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 860. [2023-04-01 05:38:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 579 states have (on average 1.5785837651122625) internal successors, (914), 614 states have internal predecessors, (914), 204 states have call successors, (204), 72 states have call predecessors, (204), 76 states have return successors, (210), 197 states have call predecessors, (210), 196 states have call successors, (210) [2023-04-01 05:38:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1328 transitions. [2023-04-01 05:38:13,566 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1328 transitions. Word has length 101 [2023-04-01 05:38:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:13,566 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 1328 transitions. [2023-04-01 05:38:13,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-01 05:38:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1328 transitions. [2023-04-01 05:38:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 05:38:13,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:13,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:13,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:38:13,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:13,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash -530667865, now seen corresponding path program 1 times [2023-04-01 05:38:13,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:13,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971673949] [2023-04-01 05:38:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:13,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:38:14,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:14,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971673949] [2023-04-01 05:38:14,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971673949] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:14,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:14,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:38:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901175859] [2023-04-01 05:38:14,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:14,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:38:14,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:14,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:38:14,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:14,009 INFO L87 Difference]: Start difference. First operand 860 states and 1328 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2023-04-01 05:38:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:15,746 INFO L93 Difference]: Finished difference Result 1825 states and 2823 transitions. [2023-04-01 05:38:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:38:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 105 [2023-04-01 05:38:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:15,753 INFO L225 Difference]: With dead ends: 1825 [2023-04-01 05:38:15,753 INFO L226 Difference]: Without dead ends: 1243 [2023-04-01 05:38:15,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:38:15,756 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1338 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 3121 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 3539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 3121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:15,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 448 Invalid, 3539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 3121 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 05:38:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2023-04-01 05:38:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1193. [2023-04-01 05:38:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 788 states have (on average 1.5279187817258884) internal successors, (1204), 840 states have internal predecessors, (1204), 290 states have call successors, (290), 106 states have call predecessors, (290), 114 states have return successors, (306), 282 states have call predecessors, (306), 282 states have call successors, (306) [2023-04-01 05:38:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1800 transitions. [2023-04-01 05:38:15,810 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1800 transitions. Word has length 105 [2023-04-01 05:38:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:15,810 INFO L495 AbstractCegarLoop]: Abstraction has 1193 states and 1800 transitions. [2023-04-01 05:38:15,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2023-04-01 05:38:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1800 transitions. [2023-04-01 05:38:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 05:38:15,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:15,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:15,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:38:15,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:15,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:15,813 INFO L85 PathProgramCache]: Analyzing trace with hash -452343188, now seen corresponding path program 1 times [2023-04-01 05:38:15,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:15,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284111285] [2023-04-01 05:38:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:15,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:38:16,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:16,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284111285] [2023-04-01 05:38:16,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284111285] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:16,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:16,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:38:16,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459940177] [2023-04-01 05:38:16,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:16,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:38:16,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:16,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:38:16,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:38:16,013 INFO L87 Difference]: Start difference. First operand 1193 states and 1800 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:38:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:16,262 INFO L93 Difference]: Finished difference Result 2252 states and 3483 transitions. [2023-04-01 05:38:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:38:16,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 108 [2023-04-01 05:38:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:16,268 INFO L225 Difference]: With dead ends: 2252 [2023-04-01 05:38:16,268 INFO L226 Difference]: Without dead ends: 1193 [2023-04-01 05:38:16,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:16,272 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 211 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:16,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3272 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2023-04-01 05:38:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1193. [2023-04-01 05:38:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 788 states have (on average 1.4873096446700507) internal successors, (1172), 840 states have internal predecessors, (1172), 290 states have call successors, (290), 106 states have call predecessors, (290), 114 states have return successors, (306), 282 states have call predecessors, (306), 282 states have call successors, (306) [2023-04-01 05:38:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1768 transitions. [2023-04-01 05:38:16,322 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1768 transitions. Word has length 108 [2023-04-01 05:38:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:16,322 INFO L495 AbstractCegarLoop]: Abstraction has 1193 states and 1768 transitions. [2023-04-01 05:38:16,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:38:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1768 transitions. [2023-04-01 05:38:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 05:38:16,324 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:16,324 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:16,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:38:16,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:16,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:16,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1487501373, now seen corresponding path program 1 times [2023-04-01 05:38:16,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:16,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753477523] [2023-04-01 05:38:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:16,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:38:16,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:16,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753477523] [2023-04-01 05:38:16,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753477523] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:16,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:16,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:38:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148406746] [2023-04-01 05:38:16,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:16,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:38:16,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:38:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:38:16,638 INFO L87 Difference]: Start difference. First operand 1193 states and 1768 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2023-04-01 05:38:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:18,304 INFO L93 Difference]: Finished difference Result 2121 states and 3153 transitions. [2023-04-01 05:38:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:38:18,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 110 [2023-04-01 05:38:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:18,356 INFO L225 Difference]: With dead ends: 2121 [2023-04-01 05:38:18,357 INFO L226 Difference]: Without dead ends: 1263 [2023-04-01 05:38:18,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:38:18,360 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 946 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:18,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 499 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 05:38:18,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-04-01 05:38:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1220. [2023-04-01 05:38:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 806 states have (on average 1.4813895781637718) internal successors, (1194), 862 states have internal predecessors, (1194), 291 states have call successors, (291), 111 states have call predecessors, (291), 122 states have return successors, (317), 282 states have call predecessors, (317), 283 states have call successors, (317) [2023-04-01 05:38:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1802 transitions. [2023-04-01 05:38:18,424 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1802 transitions. Word has length 110 [2023-04-01 05:38:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:18,425 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1802 transitions. [2023-04-01 05:38:18,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2023-04-01 05:38:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1802 transitions. [2023-04-01 05:38:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 05:38:18,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:18,427 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 05:38:18,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 05:38:18,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:18,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash 366407545, now seen corresponding path program 1 times [2023-04-01 05:38:18,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:18,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731679841] [2023-04-01 05:38:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:18,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 05:38:18,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:18,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731679841] [2023-04-01 05:38:18,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731679841] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:18,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:18,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:38:18,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099881426] [2023-04-01 05:38:18,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:18,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:38:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:38:18,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:38:18,675 INFO L87 Difference]: Start difference. First operand 1220 states and 1802 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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) [2023-04-01 05:38:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:19,200 INFO L93 Difference]: Finished difference Result 1260 states and 1859 transitions. [2023-04-01 05:38:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:19,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 114 [2023-04-01 05:38:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:19,207 INFO L225 Difference]: With dead ends: 1260 [2023-04-01 05:38:19,207 INFO L226 Difference]: Without dead ends: 1243 [2023-04-01 05:38:19,208 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 [2023-04-01 05:38:19,208 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 593 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:19,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1786 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 05:38:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2023-04-01 05:38:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1224. [2023-04-01 05:38:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 810 states have (on average 1.4790123456790123) internal successors, (1198), 866 states have internal predecessors, (1198), 291 states have call successors, (291), 111 states have call predecessors, (291), 122 states have return successors, (317), 282 states have call predecessors, (317), 283 states have call successors, (317) [2023-04-01 05:38:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1806 transitions. [2023-04-01 05:38:19,263 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1806 transitions. Word has length 114 [2023-04-01 05:38:19,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:19,263 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1806 transitions. [2023-04-01 05:38:19,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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) [2023-04-01 05:38:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1806 transitions. [2023-04-01 05:38:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 05:38:19,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:19,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 05:38:19,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:19,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1574240102, now seen corresponding path program 1 times [2023-04-01 05:38:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:19,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028932695] [2023-04-01 05:38:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:38:19,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028932695] [2023-04-01 05:38:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028932695] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:19,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:19,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:38:19,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635975683] [2023-04-01 05:38:19,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:19,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:38:19,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:38:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:19,534 INFO L87 Difference]: Start difference. First operand 1224 states and 1806 transitions. Second operand has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-01 05:38:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:19,685 INFO L93 Difference]: Finished difference Result 1245 states and 1832 transitions. [2023-04-01 05:38:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:38:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) Word has length 122 [2023-04-01 05:38:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:19,690 INFO L225 Difference]: With dead ends: 1245 [2023-04-01 05:38:19,690 INFO L226 Difference]: Without dead ends: 1228 [2023-04-01 05:38:19,691 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 [2023-04-01 05:38:19,692 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 10 mSDsluCounter, 3275 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:19,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3824 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2023-04-01 05:38:19,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1224. [2023-04-01 05:38:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 810 states have (on average 1.4753086419753085) internal successors, (1195), 866 states have internal predecessors, (1195), 291 states have call successors, (291), 111 states have call predecessors, (291), 122 states have return successors, (317), 282 states have call predecessors, (317), 283 states have call successors, (317) [2023-04-01 05:38:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1803 transitions. [2023-04-01 05:38:19,769 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1803 transitions. Word has length 122 [2023-04-01 05:38:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:19,769 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1803 transitions. [2023-04-01 05:38:19,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-01 05:38:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1803 transitions. [2023-04-01 05:38:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-01 05:38:19,771 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:19,771 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 05:38:19,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 05:38:19,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:19,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1334104920, now seen corresponding path program 1 times [2023-04-01 05:38:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:19,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764843657] [2023-04-01 05:38:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:19,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:38:19,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:19,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764843657] [2023-04-01 05:38:19,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764843657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:19,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:19,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:19,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341586299] [2023-04-01 05:38:19,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:19,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:19,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:19,865 INFO L87 Difference]: Start difference. First operand 1224 states and 1803 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 05:38:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:20,020 INFO L93 Difference]: Finished difference Result 3543 states and 5301 transitions. [2023-04-01 05:38:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 134 [2023-04-01 05:38:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:20,031 INFO L225 Difference]: With dead ends: 3543 [2023-04-01 05:38:20,031 INFO L226 Difference]: Without dead ends: 2361 [2023-04-01 05:38:20,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:20,037 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 538 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:20,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1118 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2023-04-01 05:38:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2314. [2023-04-01 05:38:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 1565 states have (on average 1.4875399361022363) internal successors, (2328), 1673 states have internal predecessors, (2328), 523 states have call successors, (523), 198 states have call predecessors, (523), 225 states have return successors, (604), 496 states have call predecessors, (604), 514 states have call successors, (604) [2023-04-01 05:38:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3455 transitions. [2023-04-01 05:38:20,141 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3455 transitions. Word has length 134 [2023-04-01 05:38:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:20,141 INFO L495 AbstractCegarLoop]: Abstraction has 2314 states and 3455 transitions. [2023-04-01 05:38:20,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 05:38:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3455 transitions. [2023-04-01 05:38:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 05:38:20,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:20,143 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 05:38:20,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 05:38:20,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:20,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash 238316894, now seen corresponding path program 1 times [2023-04-01 05:38:20,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:20,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946020977] [2023-04-01 05:38:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:20,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:38:20,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:20,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946020977] [2023-04-01 05:38:20,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946020977] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:20,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:20,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:20,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707053133] [2023-04-01 05:38:20,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:20,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:20,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:20,265 INFO L87 Difference]: Start difference. First operand 2314 states and 3455 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:20,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:20,497 INFO L93 Difference]: Finished difference Result 6812 states and 10324 transitions. [2023-04-01 05:38:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 138 [2023-04-01 05:38:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:20,522 INFO L225 Difference]: With dead ends: 6812 [2023-04-01 05:38:20,522 INFO L226 Difference]: Without dead ends: 4543 [2023-04-01 05:38:20,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:20,533 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 537 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:20,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1124 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2023-04-01 05:38:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4495. [2023-04-01 05:38:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4495 states, 3076 states have (on average 1.4931729518855656) internal successors, (4593), 3288 states have internal predecessors, (4593), 987 states have call successors, (987), 372 states have call predecessors, (987), 431 states have return successors, (1218), 924 states have call predecessors, (1218), 976 states have call successors, (1218) [2023-04-01 05:38:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 6798 transitions. [2023-04-01 05:38:20,794 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 6798 transitions. Word has length 138 [2023-04-01 05:38:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:20,794 INFO L495 AbstractCegarLoop]: Abstraction has 4495 states and 6798 transitions. [2023-04-01 05:38:20,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 6798 transitions. [2023-04-01 05:38:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 05:38:20,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:20,798 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 05:38:20,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 05:38:20,798 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:20,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2079876586, now seen corresponding path program 1 times [2023-04-01 05:38:20,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:20,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671231810] [2023-04-01 05:38:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:20,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:38:20,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:20,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671231810] [2023-04-01 05:38:20,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671231810] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:20,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:20,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:20,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669486230] [2023-04-01 05:38:20,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:20,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:20,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:20,891 INFO L87 Difference]: Start difference. First operand 4495 states and 6798 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 05:38:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:21,322 INFO L93 Difference]: Finished difference Result 13351 states and 20570 transitions. [2023-04-01 05:38:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:21,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 136 [2023-04-01 05:38:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:21,369 INFO L225 Difference]: With dead ends: 13351 [2023-04-01 05:38:21,369 INFO L226 Difference]: Without dead ends: 8907 [2023-04-01 05:38:21,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:21,389 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 536 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:21,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1130 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2023-04-01 05:38:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 8858. [2023-04-01 05:38:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 6099 states have (on average 1.4951631414986064) internal successors, (9119), 6519 states have internal predecessors, (9119), 1915 states have call successors, (1915), 720 states have call predecessors, (1915), 843 states have return successors, (2584), 1780 states have call predecessors, (2584), 1900 states have call successors, (2584) [2023-04-01 05:38:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 13618 transitions. [2023-04-01 05:38:21,897 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 13618 transitions. Word has length 136 [2023-04-01 05:38:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:21,898 INFO L495 AbstractCegarLoop]: Abstraction has 8858 states and 13618 transitions. [2023-04-01 05:38:21,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 05:38:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 13618 transitions. [2023-04-01 05:38:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-01 05:38:21,901 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:21,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:21,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 05:38:21,901 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:21,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1348876640, now seen corresponding path program 1 times [2023-04-01 05:38:21,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:21,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438266158] [2023-04-01 05:38:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:21,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:38:22,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:22,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438266158] [2023-04-01 05:38:22,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438266158] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:22,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:22,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:22,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004066733] [2023-04-01 05:38:22,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:22,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:22,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:22,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:22,014 INFO L87 Difference]: Start difference. First operand 8858 states and 13618 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:22,840 INFO L93 Difference]: Finished difference Result 26430 states and 41755 transitions. [2023-04-01 05:38:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:22,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 140 [2023-04-01 05:38:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:22,961 INFO L225 Difference]: With dead ends: 26430 [2023-04-01 05:38:22,961 INFO L226 Difference]: Without dead ends: 17635 [2023-04-01 05:38:23,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:23,010 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 535 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:23,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1136 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17635 states. [2023-04-01 05:38:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17635 to 17585. [2023-04-01 05:38:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17585 states, 12146 states have (on average 1.4952247653548494) internal successors, (18161), 12982 states have internal predecessors, (18161), 3771 states have call successors, (3771), 1416 states have call predecessors, (3771), 1667 states have return successors, (5802), 3492 states have call predecessors, (5802), 3748 states have call successors, (5802) [2023-04-01 05:38:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17585 states to 17585 states and 27734 transitions. [2023-04-01 05:38:24,087 INFO L78 Accepts]: Start accepts. Automaton has 17585 states and 27734 transitions. Word has length 140 [2023-04-01 05:38:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:24,088 INFO L495 AbstractCegarLoop]: Abstraction has 17585 states and 27734 transitions. [2023-04-01 05:38:24,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 17585 states and 27734 transitions. [2023-04-01 05:38:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 05:38:24,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:24,090 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 05:38:24,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 05:38:24,091 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:24,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1561339692, now seen corresponding path program 1 times [2023-04-01 05:38:24,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:24,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912214017] [2023-04-01 05:38:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:24,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:38:24,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:24,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912214017] [2023-04-01 05:38:24,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912214017] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:24,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:24,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:24,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639019189] [2023-04-01 05:38:24,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:24,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:24,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:24,193 INFO L87 Difference]: Start difference. First operand 17585 states and 27734 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 05:38:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:24,919 INFO L93 Difference]: Finished difference Result 18727 states and 29704 transitions. [2023-04-01 05:38:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:24,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 138 [2023-04-01 05:38:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:25,021 INFO L225 Difference]: With dead ends: 18727 [2023-04-01 05:38:25,023 INFO L226 Difference]: Without dead ends: 18714 [2023-04-01 05:38:25,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:25,037 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 521 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:25,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1134 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18714 states. [2023-04-01 05:38:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18714 to 18665. [2023-04-01 05:38:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18665 states, 12894 states have (on average 1.4946486738017684) internal successors, (19272), 13782 states have internal predecessors, (19272), 4002 states have call successors, (4002), 1502 states have call predecessors, (4002), 1768 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-01 05:38:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18665 states to 18665 states and 29616 transitions. [2023-04-01 05:38:26,294 INFO L78 Accepts]: Start accepts. Automaton has 18665 states and 29616 transitions. Word has length 138 [2023-04-01 05:38:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:26,294 INFO L495 AbstractCegarLoop]: Abstraction has 18665 states and 29616 transitions. [2023-04-01 05:38:26,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 05:38:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand 18665 states and 29616 transitions. [2023-04-01 05:38:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-04-01 05:38:26,301 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:26,301 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2023-04-01 05:38:26,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 05:38:26,301 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:26,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash 261839350, now seen corresponding path program 1 times [2023-04-01 05:38:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:26,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910921310] [2023-04-01 05:38:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:26,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-01 05:38:26,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:26,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910921310] [2023-04-01 05:38:26,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910921310] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:26,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767944473] [2023-04-01 05:38:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:26,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:26,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:26,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:26,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:38:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:27,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:38:27,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 05:38:27,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:27,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767944473] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:27,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:27,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-01 05:38:27,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665046139] [2023-04-01 05:38:27,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:27,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:38:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:38:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:38:27,233 INFO L87 Difference]: Start difference. First operand 18665 states and 29616 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-01 05:38:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:28,255 INFO L93 Difference]: Finished difference Result 39276 states and 64132 transitions. [2023-04-01 05:38:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:28,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 190 [2023-04-01 05:38:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:28,351 INFO L225 Difference]: With dead ends: 39276 [2023-04-01 05:38:28,351 INFO L226 Difference]: Without dead ends: 20654 [2023-04-01 05:38:28,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:38:28,406 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 213 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:28,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1425 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:38:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20654 states. [2023-04-01 05:38:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20654 to 20654. [2023-04-01 05:38:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20654 states, 14832 states have (on average 1.5503640776699028) internal successors, (22995), 15720 states have internal predecessors, (22995), 4002 states have call successors, (4002), 1553 states have call predecessors, (4002), 1819 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-01 05:38:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20654 states to 20654 states and 33339 transitions. [2023-04-01 05:38:29,525 INFO L78 Accepts]: Start accepts. Automaton has 20654 states and 33339 transitions. Word has length 190 [2023-04-01 05:38:29,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:29,525 INFO L495 AbstractCegarLoop]: Abstraction has 20654 states and 33339 transitions. [2023-04-01 05:38:29,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-01 05:38:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 20654 states and 33339 transitions. [2023-04-01 05:38:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-04-01 05:38:29,532 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:29,533 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2023-04-01 05:38:29,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 05:38:29,742 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,SelfDestructingSolverStorable13 [2023-04-01 05:38:29,743 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:29,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1221491950, now seen corresponding path program 1 times [2023-04-01 05:38:29,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:29,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318617296] [2023-04-01 05:38:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:29,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-04-01 05:38:31,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:31,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318617296] [2023-04-01 05:38:31,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318617296] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:31,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476069221] [2023-04-01 05:38:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:31,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:31,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:31,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:31,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:38:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:31,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:38:31,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 05:38:31,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:31,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476069221] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:31,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:31,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-04-01 05:38:31,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729536875] [2023-04-01 05:38:31,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:31,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:38:31,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:31,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:38:31,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:38:31,593 INFO L87 Difference]: Start difference. First operand 20654 states and 33339 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-01 05:38:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:32,868 INFO L93 Difference]: Finished difference Result 43254 states and 71527 transitions. [2023-04-01 05:38:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 195 [2023-04-01 05:38:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:32,994 INFO L225 Difference]: With dead ends: 43254 [2023-04-01 05:38:32,994 INFO L226 Difference]: Without dead ends: 22643 [2023-04-01 05:38:33,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:38:33,073 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 211 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:33,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1425 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:38:33,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22643 states. [2023-04-01 05:38:34,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22643 to 22643. [2023-04-01 05:38:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22643 states, 16770 states have (on average 1.5932021466905189) internal successors, (26718), 17658 states have internal predecessors, (26718), 4002 states have call successors, (4002), 1604 states have call predecessors, (4002), 1870 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-01 05:38:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22643 states to 22643 states and 37062 transitions. [2023-04-01 05:38:34,247 INFO L78 Accepts]: Start accepts. Automaton has 22643 states and 37062 transitions. Word has length 195 [2023-04-01 05:38:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:34,247 INFO L495 AbstractCegarLoop]: Abstraction has 22643 states and 37062 transitions. [2023-04-01 05:38:34,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-01 05:38:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 22643 states and 37062 transitions. [2023-04-01 05:38:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-01 05:38:34,253 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:34,254 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2023-04-01 05:38:34,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:38:34,463 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,SelfDestructingSolverStorable14 [2023-04-01 05:38:34,464 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:34,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:34,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2017120962, now seen corresponding path program 1 times [2023-04-01 05:38:34,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:34,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45239485] [2023-04-01 05:38:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:34,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-01 05:38:35,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:35,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45239485] [2023-04-01 05:38:35,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45239485] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:35,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400244037] [2023-04-01 05:38:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:35,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:35,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:35,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:35,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:38:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:36,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 3063 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:38:36,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 05:38:36,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:36,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400244037] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:36,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:36,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-04-01 05:38:36,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947910986] [2023-04-01 05:38:36,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:38:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:38:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:38:36,315 INFO L87 Difference]: Start difference. First operand 22643 states and 37062 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-01 05:38:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:37,204 INFO L93 Difference]: Finished difference Result 47232 states and 78922 transitions. [2023-04-01 05:38:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 199 [2023-04-01 05:38:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:37,324 INFO L225 Difference]: With dead ends: 47232 [2023-04-01 05:38:37,324 INFO L226 Difference]: Without dead ends: 24632 [2023-04-01 05:38:37,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:38:37,400 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 209 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:37,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1425 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:38:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24632 states. [2023-04-01 05:38:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24632 to 24632. [2023-04-01 05:38:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24632 states, 18708 states have (on average 1.6271648492623476) internal successors, (30441), 19596 states have internal predecessors, (30441), 4002 states have call successors, (4002), 1655 states have call predecessors, (4002), 1921 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-01 05:38:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24632 states to 24632 states and 40785 transitions. [2023-04-01 05:38:38,522 INFO L78 Accepts]: Start accepts. Automaton has 24632 states and 40785 transitions. Word has length 199 [2023-04-01 05:38:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:38,523 INFO L495 AbstractCegarLoop]: Abstraction has 24632 states and 40785 transitions. [2023-04-01 05:38:38,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-01 05:38:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 24632 states and 40785 transitions. [2023-04-01 05:38:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-04-01 05:38:38,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:38,530 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2023-04-01 05:38:38,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:38:38,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:38,739 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:38,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash -914351908, now seen corresponding path program 1 times [2023-04-01 05:38:38,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:38,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326117024] [2023-04-01 05:38:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:38,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 05:38:40,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326117024] [2023-04-01 05:38:40,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326117024] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176053649] [2023-04-01 05:38:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:40,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:40,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:40,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:40,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:38:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:40,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:38:40,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-01 05:38:40,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:40,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176053649] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:40,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:40,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-04-01 05:38:40,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933594507] [2023-04-01 05:38:40,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:40,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:38:40,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:38:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:38:40,578 INFO L87 Difference]: Start difference. First operand 24632 states and 40785 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-01 05:38:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:41,450 INFO L93 Difference]: Finished difference Result 51210 states and 86317 transitions. [2023-04-01 05:38:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:41,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 202 [2023-04-01 05:38:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:41,562 INFO L225 Difference]: With dead ends: 51210 [2023-04-01 05:38:41,563 INFO L226 Difference]: Without dead ends: 26621 [2023-04-01 05:38:41,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:38:41,629 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 207 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:41,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1425 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26621 states. [2023-04-01 05:38:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26621 to 26621. [2023-04-01 05:38:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26621 states, 20646 states have (on average 1.6547515257192678) internal successors, (34164), 21534 states have internal predecessors, (34164), 4002 states have call successors, (4002), 1706 states have call predecessors, (4002), 1972 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-01 05:38:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26621 states to 26621 states and 44508 transitions. [2023-04-01 05:38:42,691 INFO L78 Accepts]: Start accepts. Automaton has 26621 states and 44508 transitions. Word has length 202 [2023-04-01 05:38:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:42,692 INFO L495 AbstractCegarLoop]: Abstraction has 26621 states and 44508 transitions. [2023-04-01 05:38:42,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-01 05:38:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 26621 states and 44508 transitions. [2023-04-01 05:38:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-04-01 05:38:42,698 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:42,698 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:42,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:38:42,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 05:38:42,908 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:42,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:42,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1893969226, now seen corresponding path program 1 times [2023-04-01 05:38:42,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:42,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112391548] [2023-04-01 05:38:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:42,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-04-01 05:38:44,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:44,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112391548] [2023-04-01 05:38:44,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112391548] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:44,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201756620] [2023-04-01 05:38:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:44,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:44,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:44,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:44,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:38:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:44,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 3062 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 05:38:44,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-01 05:38:44,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:44,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201756620] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:44,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:44,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [19] total 23 [2023-04-01 05:38:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138746533] [2023-04-01 05:38:44,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:44,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:38:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:44,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:38:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-04-01 05:38:44,652 INFO L87 Difference]: Start difference. First operand 26621 states and 44508 transitions. Second operand has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (42), 3 states have call predecessors, (42), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-01 05:38:46,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:46,140 INFO L93 Difference]: Finished difference Result 56185 states and 94211 transitions. [2023-04-01 05:38:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:38:46,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (42), 3 states have call predecessors, (42), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) Word has length 204 [2023-04-01 05:38:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:46,255 INFO L225 Difference]: With dead ends: 56185 [2023-04-01 05:38:46,255 INFO L226 Difference]: Without dead ends: 29652 [2023-04-01 05:38:46,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-04-01 05:38:46,321 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 317 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:46,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 2045 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 05:38:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29652 states. [2023-04-01 05:38:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29652 to 29398. [2023-04-01 05:38:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29398 states, 22485 states have (on average 1.6273070936179674) internal successors, (36590), 23410 states have internal predecessors, (36590), 4529 states have call successors, (4529), 2097 states have call predecessors, (4529), 2383 states have return successors, (8119), 4214 states have call predecessors, (8119), 4506 states have call successors, (8119) [2023-04-01 05:38:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29398 states to 29398 states and 49238 transitions. [2023-04-01 05:38:47,752 INFO L78 Accepts]: Start accepts. Automaton has 29398 states and 49238 transitions. Word has length 204 [2023-04-01 05:38:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:47,753 INFO L495 AbstractCegarLoop]: Abstraction has 29398 states and 49238 transitions. [2023-04-01 05:38:47,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (42), 3 states have call predecessors, (42), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-01 05:38:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 29398 states and 49238 transitions. [2023-04-01 05:38:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-01 05:38:47,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:47,760 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:47,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:38:47,969 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,SelfDestructingSolverStorable17 [2023-04-01 05:38:47,970 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:47,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:47,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1656547269, now seen corresponding path program 1 times [2023-04-01 05:38:47,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:47,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658752276] [2023-04-01 05:38:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:47,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-01 05:38:48,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:48,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658752276] [2023-04-01 05:38:48,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658752276] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:48,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563290721] [2023-04-01 05:38:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:48,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:48,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:48,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:48,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:38:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:48,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 3848 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 05:38:48,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-04-01 05:38:49,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:49,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563290721] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:49,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:49,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 05:38:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530027481] [2023-04-01 05:38:49,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:49,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:49,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:38:49,005 INFO L87 Difference]: Start difference. First operand 29398 states and 49238 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-04-01 05:38:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:50,260 INFO L93 Difference]: Finished difference Result 59076 states and 99861 transitions. [2023-04-01 05:38:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:50,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 324 [2023-04-01 05:38:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:50,358 INFO L225 Difference]: With dead ends: 59076 [2023-04-01 05:38:50,359 INFO L226 Difference]: Without dead ends: 29741 [2023-04-01 05:38:50,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:38:50,404 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 8 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:50,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1089 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:38:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29741 states. [2023-04-01 05:38:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29741 to 29732. [2023-04-01 05:38:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29732 states, 22757 states have (on average 1.6217867029924857) internal successors, (36907), 23753 states have internal predecessors, (36907), 4529 states have call successors, (4529), 2097 states have call predecessors, (4529), 2445 states have return successors, (7178), 4205 states have call predecessors, (7178), 4506 states have call successors, (7178) [2023-04-01 05:38:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29732 states to 29732 states and 48614 transitions. [2023-04-01 05:38:51,672 INFO L78 Accepts]: Start accepts. Automaton has 29732 states and 48614 transitions. Word has length 324 [2023-04-01 05:38:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:51,673 INFO L495 AbstractCegarLoop]: Abstraction has 29732 states and 48614 transitions. [2023-04-01 05:38:51,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-04-01 05:38:51,673 INFO L276 IsEmpty]: Start isEmpty. Operand 29732 states and 48614 transitions. [2023-04-01 05:38:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-04-01 05:38:51,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:51,680 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:51,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:38:51,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:51,894 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:51,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:51,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1614492020, now seen corresponding path program 1 times [2023-04-01 05:38:51,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:51,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447225087] [2023-04-01 05:38:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-01 05:38:52,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:52,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447225087] [2023-04-01 05:38:52,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447225087] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:52,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221280489] [2023-04-01 05:38:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:52,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:52,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:52,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:52,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:38:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:52,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 3841 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 05:38:52,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2023-04-01 05:38:53,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:53,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221280489] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:53,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:53,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-04-01 05:38:53,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414671291] [2023-04-01 05:38:53,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:53,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:38:53,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:38:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-04-01 05:38:53,110 INFO L87 Difference]: Start difference. First operand 29732 states and 48614 transitions. Second operand has 9 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 5 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (43), 7 states have call predecessors, (43), 4 states have call successors, (43)