/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_spec3_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:36:46,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:36:46,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:36:46,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:36:46,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:36:46,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:36:46,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:36:46,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:36:46,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:36:46,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:36:46,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:36:46,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:36:46,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:36:46,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:36:46,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:36:46,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:36:46,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:36:46,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:36:46,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:36:46,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:36:46,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:36:46,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:36:46,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:36:46,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:36:46,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:36:46,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:36:46,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:36:46,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:36:46,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:36:46,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:36:46,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:36:46,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:36:46,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:36:46,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:36:46,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:36:46,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:36:46,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:36:46,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:36:46,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:36:46,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:36:46,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:36:46,869 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 05:36:46,894 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:36:46,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:36:46,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:36:46,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:36:46,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:36:46,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:36:46,895 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:36:46,895 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:36:46,895 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:36:46,895 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:36:46,896 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:36:46,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:36:46,896 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:36:46,896 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:36:46,896 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:36:46,896 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:36:46,897 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:36:46,897 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:36:46,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:36:46,897 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:36:46,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:36:46,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:36:46,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:36:46,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:36:46,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:36:46,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:36:46,898 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:36:46,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:36:46,898 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:36:46,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:36:46,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:36:46,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:36:46,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:36:46,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:36:46,899 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:36:46,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:36:46,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:36:46,899 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:36:46,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:36:46,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:36:46,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:36:46,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:36:47,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:36:47,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:36:47,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:36:47,106 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:36:47,106 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:36:47,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2023-04-01 05:36:48,067 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:36:48,437 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:36:48,438 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2023-04-01 05:36:48,457 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af4e77c9a/d8eed6999c2b4657ad3d06cf96505252/FLAGe1500e430 [2023-04-01 05:36:48,475 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af4e77c9a/d8eed6999c2b4657ad3d06cf96505252 [2023-04-01 05:36:48,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:36:48,481 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:36:48,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:36:48,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:36:48,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:36:48,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:36:48" (1/1) ... [2023-04-01 05:36:48,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35c56527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:48, skipping insertion in model container [2023-04-01 05:36:48,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:36:48" (1/1) ... [2023-04-01 05:36:48,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:36:48,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:36:48,792 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_spec3_product09.cil.c[21710,21723] [2023-04-01 05:36:48,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:36:49,005 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:36:49,038 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_spec3_product09.cil.c[21710,21723] [2023-04-01 05:36:49,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:36:49,131 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:36:49,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49 WrapperNode [2023-04-01 05:36:49,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:36:49,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:36:49,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:36:49,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:36:49,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (1/1) ... [2023-04-01 05:36:49,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (1/1) ... [2023-04-01 05:36:49,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (1/1) ... [2023-04-01 05:36:49,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (1/1) ... [2023-04-01 05:36:49,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (1/1) ... [2023-04-01 05:36:49,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (1/1) ... [2023-04-01 05:36:49,256 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (1/1) ... [2023-04-01 05:36:49,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (1/1) ... [2023-04-01 05:36:49,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:36:49,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:36:49,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:36:49,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:36:49,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (1/1) ... [2023-04-01 05:36:49,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:36:49,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:36:49,334 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 05:36:49,348 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 05:36:49,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:36:49,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:36:49,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:36:49,361 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:36:49,362 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 05:36:49,362 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 05:36:49,362 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:36:49,362 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 05:36:49,362 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 05:36:49,362 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 05:36:49,363 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 05:36:49,364 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 05:36:49,365 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 05:36:49,365 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 05:36:49,365 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 05:36:49,365 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:36:49,365 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 05:36:49,365 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 05:36:49,366 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:36:49,366 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:36:49,366 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:36:49,366 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:36:49,366 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 05:36:49,367 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 05:36:49,367 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 05:36:49,367 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 05:36:49,367 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 05:36:49,367 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 05:36:49,367 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 05:36:49,367 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 05:36:49,367 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:36:49,368 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 05:36:49,368 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 05:36:49,368 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 05:36:49,368 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:36:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 05:36:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:36:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:36:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:36:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2023-04-01 05:36:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2023-04-01 05:36:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:36:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:36:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:36:49,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:36:49,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:36:49,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 05:36:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 05:36:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 05:36:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 05:36:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 05:36:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 05:36:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 05:36:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 05:36:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:36:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:36:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 05:36:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 05:36:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 05:36:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 05:36:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 05:36:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 05:36:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 05:36:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 05:36:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 05:36:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 05:36:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 05:36:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 05:36:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 05:36:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 05:36:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 05:36:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 05:36:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 05:36:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2023-04-01 05:36:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2023-04-01 05:36:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 05:36:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:36:49,378 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:36:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:36:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:36:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 05:36:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 05:36:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 05:36:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 05:36:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 05:36:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 05:36:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 05:36:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 05:36:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 05:36:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:36:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:36:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:36:49,584 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:36:49,587 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:36:50,558 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:36:51,111 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:36:51,111 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 05:36:51,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:36:51 BoogieIcfgContainer [2023-04-01 05:36:51,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:36:51,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:36:51,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:36:51,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:36:51,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:36:48" (1/3) ... [2023-04-01 05:36:51,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ebdb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:36:51, skipping insertion in model container [2023-04-01 05:36:51,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:36:49" (2/3) ... [2023-04-01 05:36:51,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ebdb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:36:51, skipping insertion in model container [2023-04-01 05:36:51,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:36:51" (3/3) ... [2023-04-01 05:36:51,154 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2023-04-01 05:36:51,170 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:36:51,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:36:51,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:36:51,234 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;@1e3f340f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:36:51,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:36:51,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 561 states, 329 states have (on average 1.4984802431610942) internal successors, (493), 352 states have internal predecessors, (493), 172 states have call successors, (172), 46 states have call predecessors, (172), 46 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) [2023-04-01 05:36:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 05:36:51,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:51,265 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] [2023-04-01 05:36:51,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:51,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash -49403757, now seen corresponding path program 1 times [2023-04-01 05:36:51,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:51,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929668211] [2023-04-01 05:36:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:36:52,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:52,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929668211] [2023-04-01 05:36:52,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929668211] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:36:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557335217] [2023-04-01 05:36:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:52,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:36:52,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:36:52,281 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 05:36:52,301 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 05:36:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:52,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 2594 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 05:36:52,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:36:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:36:52,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:36:52,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557335217] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:52,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:36:52,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-04-01 05:36:52,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290386976] [2023-04-01 05:36:52,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:52,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:36:52,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:36:52,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:36:52,914 INFO L87 Difference]: Start difference. First operand has 561 states, 329 states have (on average 1.4984802431610942) internal successors, (493), 352 states have internal predecessors, (493), 172 states have call successors, (172), 46 states have call predecessors, (172), 46 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-04-01 05:36:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:53,176 INFO L93 Difference]: Finished difference Result 1203 states and 1865 transitions. [2023-04-01 05:36:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:36:53,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 98 [2023-04-01 05:36:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:53,197 INFO L225 Difference]: With dead ends: 1203 [2023-04-01 05:36:53,197 INFO L226 Difference]: Without dead ends: 774 [2023-04-01 05:36:53,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:36:53,211 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 601 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:53,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 1158 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:36:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-04-01 05:36:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 761. [2023-04-01 05:36:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 491 states have (on average 1.54989816700611) internal successors, (761), 522 states have internal predecessors, (761), 201 states have call successors, (201), 70 states have call predecessors, (201), 68 states have return successors, (203), 192 states have call predecessors, (203), 195 states have call successors, (203) [2023-04-01 05:36:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1165 transitions. [2023-04-01 05:36:53,331 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1165 transitions. Word has length 98 [2023-04-01 05:36:53,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:53,332 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 1165 transitions. [2023-04-01 05:36:53,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-04-01 05:36:53,332 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1165 transitions. [2023-04-01 05:36:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 05:36:53,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:53,338 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] [2023-04-01 05:36:53,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:36:53,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 05:36:53,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:53,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:53,549 INFO L85 PathProgramCache]: Analyzing trace with hash -500167111, now seen corresponding path program 1 times [2023-04-01 05:36:53,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:53,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662255164] [2023-04-01 05:36:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:53,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:53,905 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 05:36:53,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:53,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662255164] [2023-04-01 05:36:53,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662255164] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:53,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:36:53,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:36:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785291293] [2023-04-01 05:36:53,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:53,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:36:53,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:36:53,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:36:53,908 INFO L87 Difference]: Start difference. First operand 761 states and 1165 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-01 05:36:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:54,079 INFO L93 Difference]: Finished difference Result 1505 states and 2333 transitions. [2023-04-01 05:36:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:36:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 99 [2023-04-01 05:36:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:54,084 INFO L225 Difference]: With dead ends: 1505 [2023-04-01 05:36:54,084 INFO L226 Difference]: Without dead ends: 775 [2023-04-01 05:36:54,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 05:36:54,088 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 33 mSDsluCounter, 3655 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 4273 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:54,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 4273 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:36:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2023-04-01 05:36:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 769. [2023-04-01 05:36:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 497 states have (on average 1.5432595573440644) internal successors, (767), 528 states have internal predecessors, (767), 201 states have call successors, (201), 70 states have call predecessors, (201), 70 states have return successors, (205), 194 states have call predecessors, (205), 195 states have call successors, (205) [2023-04-01 05:36:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1173 transitions. [2023-04-01 05:36:54,122 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1173 transitions. Word has length 99 [2023-04-01 05:36:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:54,122 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 1173 transitions. [2023-04-01 05:36:54,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-01 05:36:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1173 transitions. [2023-04-01 05:36:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 05:36:54,125 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:54,125 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] [2023-04-01 05:36:54,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:36:54,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:54,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:54,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1871478474, now seen corresponding path program 1 times [2023-04-01 05:36:54,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:54,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202030925] [2023-04-01 05:36:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:54,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 05:36:54,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:54,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202030925] [2023-04-01 05:36:54,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202030925] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:36:54,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507386122] [2023-04-01 05:36:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:54,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:36:54,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:36:54,553 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 05:36:54,555 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 05:36:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:54,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 2616 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 05:36:54,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:36:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:36:55,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:36:55,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507386122] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:55,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:36:55,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 05:36:55,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243607533] [2023-04-01 05:36:55,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:55,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:36:55,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:55,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:36:55,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:36:55,052 INFO L87 Difference]: Start difference. First operand 769 states and 1173 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-01 05:36:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:55,228 INFO L93 Difference]: Finished difference Result 2167 states and 3353 transitions. [2023-04-01 05:36:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:36:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 103 [2023-04-01 05:36:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:55,234 INFO L225 Difference]: With dead ends: 2167 [2023-04-01 05:36:55,234 INFO L226 Difference]: Without dead ends: 1429 [2023-04-01 05:36:55,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 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 05:36:55,237 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 495 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:55,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1214 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:36:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2023-04-01 05:36:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1404. [2023-04-01 05:36:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 908 states have (on average 1.502202643171806) internal successors, (1364), 968 states have internal predecessors, (1364), 369 states have call successors, (369), 124 states have call predecessors, (369), 126 states have return successors, (395), 359 states have call predecessors, (395), 362 states have call successors, (395) [2023-04-01 05:36:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2128 transitions. [2023-04-01 05:36:55,283 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2128 transitions. Word has length 103 [2023-04-01 05:36:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:55,283 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 2128 transitions. [2023-04-01 05:36:55,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-01 05:36:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2128 transitions. [2023-04-01 05:36:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 05:36:55,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:55,285 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] [2023-04-01 05:36:55,294 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 05:36:55,494 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,SelfDestructingSolverStorable2 [2023-04-01 05:36:55,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:55,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1091860681, now seen corresponding path program 1 times [2023-04-01 05:36:55,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:55,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754694423] [2023-04-01 05:36:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:55,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 05:36:55,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:55,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754694423] [2023-04-01 05:36:55,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754694423] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:36:55,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518240290] [2023-04-01 05:36:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:55,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:36:55,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:36:55,863 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 05:36:55,905 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 05:36:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:56,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 05:36:56,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:36:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:36:56,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:36:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518240290] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:56,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:36:56,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 05:36:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552980095] [2023-04-01 05:36:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:56,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:36:56,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:36:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:36:56,455 INFO L87 Difference]: Start difference. First operand 1404 states and 2128 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 05:36:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:56,986 INFO L93 Difference]: Finished difference Result 2417 states and 3669 transitions. [2023-04-01 05:36:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:36:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 107 [2023-04-01 05:36:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:56,994 INFO L225 Difference]: With dead ends: 2417 [2023-04-01 05:36:56,994 INFO L226 Difference]: Without dead ends: 1562 [2023-04-01 05:36:56,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 05:36:56,997 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 556 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:56,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1860 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 05:36:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2023-04-01 05:36:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1548. [2023-04-01 05:36:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1024 states have (on average 1.490234375) internal successors, (1526), 1086 states have internal predecessors, (1526), 387 states have call successors, (387), 132 states have call predecessors, (387), 136 states have return successors, (415), 377 states have call predecessors, (415), 380 states have call successors, (415) [2023-04-01 05:36:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 2328 transitions. [2023-04-01 05:36:57,056 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 2328 transitions. Word has length 107 [2023-04-01 05:36:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:57,056 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 2328 transitions. [2023-04-01 05:36:57,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 05:36:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 2328 transitions. [2023-04-01 05:36:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 05:36:57,058 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:57,059 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] [2023-04-01 05:36:57,085 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 05:36:57,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:36:57,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:57,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1711060636, now seen corresponding path program 1 times [2023-04-01 05:36:57,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:57,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576183228] [2023-04-01 05:36:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:57,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 05:36:57,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:57,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576183228] [2023-04-01 05:36:57,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576183228] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:36:57,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161550269] [2023-04-01 05:36:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:57,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:36:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:36:57,633 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 05:36:57,640 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 05:36:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:58,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:36:58,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:36:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:36:58,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:36:58,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161550269] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:36:58,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:36:58,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-01 05:36:58,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574987434] [2023-04-01 05:36:58,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:58,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:36:58,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:36:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:36:58,087 INFO L87 Difference]: Start difference. First operand 1548 states and 2328 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-01 05:36:58,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:36:58,271 INFO L93 Difference]: Finished difference Result 2805 states and 4302 transitions. [2023-04-01 05:36:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:36:58,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 108 [2023-04-01 05:36:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:36:58,284 INFO L225 Difference]: With dead ends: 2805 [2023-04-01 05:36:58,284 INFO L226 Difference]: Without dead ends: 1548 [2023-04-01 05:36:58,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:36:58,290 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 279 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:36:58,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1698 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:36:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2023-04-01 05:36:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1548. [2023-04-01 05:36:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1024 states have (on average 1.455078125) internal successors, (1490), 1086 states have internal predecessors, (1490), 387 states have call successors, (387), 132 states have call predecessors, (387), 136 states have return successors, (415), 377 states have call predecessors, (415), 380 states have call successors, (415) [2023-04-01 05:36:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 2292 transitions. [2023-04-01 05:36:58,358 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 2292 transitions. Word has length 108 [2023-04-01 05:36:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:36:58,359 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 2292 transitions. [2023-04-01 05:36:58,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-01 05:36:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 2292 transitions. [2023-04-01 05:36:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 05:36:58,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:36:58,362 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] [2023-04-01 05:36:58,373 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 05:36:58,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:36:58,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:36:58,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:36:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1956457601, now seen corresponding path program 1 times [2023-04-01 05:36:58,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:36:58,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577607087] [2023-04-01 05:36:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:58,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:36:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 05:36:59,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:36:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577607087] [2023-04-01 05:36:59,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577607087] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:36:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040346484] [2023-04-01 05:36:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:36:59,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:36:59,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:36:59,009 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 05:36:59,012 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 05:36:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:36:59,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 05:36:59,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:36:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 05:36:59,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:36:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 05:36:59,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040346484] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 05:36:59,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:36:59,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 17 [2023-04-01 05:36:59,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010710528] [2023-04-01 05:36:59,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:36:59,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:36:59,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:36:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:36:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-04-01 05:36:59,908 INFO L87 Difference]: Start difference. First operand 1548 states and 2292 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:37:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:02,421 INFO L93 Difference]: Finished difference Result 3564 states and 5458 transitions. [2023-04-01 05:37:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 05:37:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 110 [2023-04-01 05:37:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:02,433 INFO L225 Difference]: With dead ends: 3564 [2023-04-01 05:37:02,433 INFO L226 Difference]: Without dead ends: 2710 [2023-04-01 05:37:02,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:37:02,437 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 3062 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 1411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3154 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 3841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1411 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:02,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3154 Valid, 2295 Invalid, 3841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1411 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 05:37:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2023-04-01 05:37:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2657. [2023-04-01 05:37:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 1809 states have (on average 1.4665561083471532) internal successors, (2653), 1907 states have internal predecessors, (2653), 618 states have call successors, (618), 212 states have call predecessors, (618), 229 states have return successors, (745), 609 states have call predecessors, (745), 610 states have call successors, (745) [2023-04-01 05:37:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4016 transitions. [2023-04-01 05:37:02,547 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4016 transitions. Word has length 110 [2023-04-01 05:37:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:02,547 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4016 transitions. [2023-04-01 05:37:02,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:37:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4016 transitions. [2023-04-01 05:37:02,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 05:37:02,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:02,549 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] [2023-04-01 05:37:02,571 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 05:37:02,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:02,759 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:02,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1389987787, now seen corresponding path program 1 times [2023-04-01 05:37:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:02,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779744655] [2023-04-01 05:37:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 05:37:03,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:03,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779744655] [2023-04-01 05:37:03,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779744655] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:03,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547564699] [2023-04-01 05:37:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:03,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:03,141 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 05:37:03,142 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 05:37:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:03,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 05:37:03,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:37:03,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:37:03,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547564699] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:03,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:37:03,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-04-01 05:37:03,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972747329] [2023-04-01 05:37:03,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:03,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:37:03,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:37:03,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:37:03,745 INFO L87 Difference]: Start difference. First operand 2657 states and 4016 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-01 05:37:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:04,051 INFO L93 Difference]: Finished difference Result 6529 states and 10053 transitions. [2023-04-01 05:37:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:37:04,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 110 [2023-04-01 05:37:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:04,076 INFO L225 Difference]: With dead ends: 6529 [2023-04-01 05:37:04,076 INFO L226 Difference]: Without dead ends: 3903 [2023-04-01 05:37:04,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:37:04,090 INFO L413 NwaCegarLoop]: 780 mSDtfsCounter, 566 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:04,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1276 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:37:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2023-04-01 05:37:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 3814. [2023-04-01 05:37:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3814 states, 2612 states have (on average 1.4666921898928025) internal successors, (3831), 2755 states have internal predecessors, (3831), 877 states have call successors, (877), 298 states have call predecessors, (877), 324 states have return successors, (1063), 868 states have call predecessors, (1063), 869 states have call successors, (1063) [2023-04-01 05:37:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 5771 transitions. [2023-04-01 05:37:04,272 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 5771 transitions. Word has length 110 [2023-04-01 05:37:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:04,273 INFO L495 AbstractCegarLoop]: Abstraction has 3814 states and 5771 transitions. [2023-04-01 05:37:04,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-01 05:37:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 5771 transitions. [2023-04-01 05:37:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 05:37:04,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:04,276 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] [2023-04-01 05:37:04,285 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 05:37:04,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:04,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:04,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:04,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1990880221, now seen corresponding path program 1 times [2023-04-01 05:37:04,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:04,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622683226] [2023-04-01 05:37:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:04,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 05:37:04,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:04,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622683226] [2023-04-01 05:37:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622683226] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:04,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178059656] [2023-04-01 05:37:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:04,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:04,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:04,918 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 05:37:04,921 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 05:37:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:05,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 05:37:05,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 05:37:05,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:37:05,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178059656] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:05,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:37:05,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2023-04-01 05:37:05,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248253253] [2023-04-01 05:37:05,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:05,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:37:05,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:37:05,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-04-01 05:37:05,410 INFO L87 Difference]: Start difference. First operand 3814 states and 5771 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 05:37:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:06,114 INFO L93 Difference]: Finished difference Result 7306 states and 11103 transitions. [2023-04-01 05:37:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:37:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 111 [2023-04-01 05:37:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:06,141 INFO L225 Difference]: With dead ends: 7306 [2023-04-01 05:37:06,141 INFO L226 Difference]: Without dead ends: 3523 [2023-04-01 05:37:06,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-04-01 05:37:06,160 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 459 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:06,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 2141 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 05:37:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2023-04-01 05:37:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 3514. [2023-04-01 05:37:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 2414 states have (on average 1.4652029826014914) internal successors, (3537), 2543 states have internal predecessors, (3537), 801 states have call successors, (801), 276 states have call predecessors, (801), 298 states have return successors, (969), 790 states have call predecessors, (969), 793 states have call successors, (969) [2023-04-01 05:37:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5307 transitions. [2023-04-01 05:37:06,329 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5307 transitions. Word has length 111 [2023-04-01 05:37:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:06,330 INFO L495 AbstractCegarLoop]: Abstraction has 3514 states and 5307 transitions. [2023-04-01 05:37:06,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 05:37:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5307 transitions. [2023-04-01 05:37:06,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 05:37:06,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:06,332 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] [2023-04-01 05:37:06,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 05:37:06,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:06,545 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:06,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:06,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1855847913, now seen corresponding path program 1 times [2023-04-01 05:37:06,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:06,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093446561] [2023-04-01 05:37:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:06,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 05:37:06,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:06,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093446561] [2023-04-01 05:37:06,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093446561] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:06,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426411859] [2023-04-01 05:37:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:06,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:06,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:06,954 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:37:06,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:37:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:07,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 2648 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 05:37:07,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 05:37:07,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:37:07,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426411859] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:07,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:37:07,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 05:37:07,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477045418] [2023-04-01 05:37:07,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:07,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:37:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:07,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:37:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:37:07,475 INFO L87 Difference]: Start difference. First operand 3514 states and 5307 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 05:37:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:07,970 INFO L93 Difference]: Finished difference Result 6372 states and 9670 transitions. [2023-04-01 05:37:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:37:07,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 114 [2023-04-01 05:37:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:07,989 INFO L225 Difference]: With dead ends: 6372 [2023-04-01 05:37:07,990 INFO L226 Difference]: Without dead ends: 3535 [2023-04-01 05:37:08,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:37:08,002 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 431 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:08,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 2610 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:37:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2023-04-01 05:37:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 3518. [2023-04-01 05:37:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 2414 states have (on average 1.4652029826014914) internal successors, (3537), 2547 states have internal predecessors, (3537), 805 states have call successors, (805), 276 states have call predecessors, (805), 298 states have return successors, (973), 790 states have call predecessors, (973), 797 states have call successors, (973) [2023-04-01 05:37:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 5315 transitions. [2023-04-01 05:37:08,225 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 5315 transitions. Word has length 114 [2023-04-01 05:37:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:08,226 INFO L495 AbstractCegarLoop]: Abstraction has 3518 states and 5315 transitions. [2023-04-01 05:37:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 05:37:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 5315 transitions. [2023-04-01 05:37:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-01 05:37:08,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:08,229 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 05:37:08,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 05:37:08,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 05:37:08,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:08,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash 650125346, now seen corresponding path program 1 times [2023-04-01 05:37:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:08,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957403646] [2023-04-01 05:37:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:08,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 05:37:08,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:08,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957403646] [2023-04-01 05:37:08,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957403646] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:08,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946673323] [2023-04-01 05:37:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:08,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:08,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:08,774 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:37:08,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 05:37:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:09,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:37:09,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:37:09,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:37:09,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946673323] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:09,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:37:09,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 05:37:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711555838] [2023-04-01 05:37:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:09,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:37:09,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:37:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:37:09,229 INFO L87 Difference]: Start difference. First operand 3518 states and 5315 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:37:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:09,504 INFO L93 Difference]: Finished difference Result 6607 states and 10158 transitions. [2023-04-01 05:37:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:37:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) Word has length 134 [2023-04-01 05:37:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:09,521 INFO L225 Difference]: With dead ends: 6607 [2023-04-01 05:37:09,521 INFO L226 Difference]: Without dead ends: 3627 [2023-04-01 05:37:09,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 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 05:37:09,534 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 2 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:09,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2407 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:37:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2023-04-01 05:37:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 3592. [2023-04-01 05:37:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 2458 states have (on average 1.4568755085435314) internal successors, (3581), 2606 states have internal predecessors, (3581), 813 states have call successors, (813), 276 states have call predecessors, (813), 320 states have return successors, (1073), 805 states have call predecessors, (1073), 805 states have call successors, (1073) [2023-04-01 05:37:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 5467 transitions. [2023-04-01 05:37:09,727 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 5467 transitions. Word has length 134 [2023-04-01 05:37:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:09,728 INFO L495 AbstractCegarLoop]: Abstraction has 3592 states and 5467 transitions. [2023-04-01 05:37:09,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 05:37:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 5467 transitions. [2023-04-01 05:37:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-01 05:37:09,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:09,734 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-04-01 05:37:09,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 05:37:09,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 05:37:09,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:09,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash 604992701, now seen corresponding path program 1 times [2023-04-01 05:37:09,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:09,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969477139] [2023-04-01 05:37:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:09,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 05:37:10,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:10,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969477139] [2023-04-01 05:37:10,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969477139] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:10,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967131449] [2023-04-01 05:37:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:10,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:10,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:10,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:37:10,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 05:37:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:10,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 2782 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:37:10,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 05:37:10,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:37:10,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967131449] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:10,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:37:10,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-01 05:37:10,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678728299] [2023-04-01 05:37:10,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:10,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:37:10,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:37:10,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:37:10,751 INFO L87 Difference]: Start difference. First operand 3592 states and 5467 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 4 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-04-01 05:37:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:11,072 INFO L93 Difference]: Finished difference Result 7389 states and 11474 transitions. [2023-04-01 05:37:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:37:11,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 4 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 165 [2023-04-01 05:37:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:11,100 INFO L225 Difference]: With dead ends: 7389 [2023-04-01 05:37:11,100 INFO L226 Difference]: Without dead ends: 3592 [2023-04-01 05:37:11,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:37:11,113 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 200 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:11,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1703 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:37:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2023-04-01 05:37:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3592. [2023-04-01 05:37:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 2458 states have (on average 1.4218877135882833) internal successors, (3495), 2606 states have internal predecessors, (3495), 813 states have call successors, (813), 276 states have call predecessors, (813), 320 states have return successors, (1073), 805 states have call predecessors, (1073), 805 states have call successors, (1073) [2023-04-01 05:37:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 5381 transitions. [2023-04-01 05:37:11,243 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 5381 transitions. Word has length 165 [2023-04-01 05:37:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:11,244 INFO L495 AbstractCegarLoop]: Abstraction has 3592 states and 5381 transitions. [2023-04-01 05:37:11,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 4 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-04-01 05:37:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 5381 transitions. [2023-04-01 05:37:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-04-01 05:37:11,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:11,250 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:37:11,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 05:37:11,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 05:37:11,459 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:11,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash -554214334, now seen corresponding path program 1 times [2023-04-01 05:37:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:11,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451402747] [2023-04-01 05:37:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-01 05:37:11,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451402747] [2023-04-01 05:37:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451402747] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965755728] [2023-04-01 05:37:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:11,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:11,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:11,829 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:37:11,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 05:37:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:12,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 2977 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 05:37:12,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:37:12,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:37:12,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965755728] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:12,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:37:12,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2023-04-01 05:37:12,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006277375] [2023-04-01 05:37:12,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:12,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:37:12,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:37:12,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-04-01 05:37:12,421 INFO L87 Difference]: Start difference. First operand 3592 states and 5381 transitions. Second operand has 9 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 5 states have call successors, (39), 4 states have call predecessors, (39), 6 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2023-04-01 05:37:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:15,696 INFO L93 Difference]: Finished difference Result 9424 states and 14329 transitions. [2023-04-01 05:37:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 05:37:15,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 5 states have call successors, (39), 4 states have call predecessors, (39), 6 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) Word has length 166 [2023-04-01 05:37:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:15,725 INFO L225 Difference]: With dead ends: 9424 [2023-04-01 05:37:15,725 INFO L226 Difference]: Without dead ends: 5863 [2023-04-01 05:37:15,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 05:37:15,739 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 2103 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 6352 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 7342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 6352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:15,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2196 Valid, 973 Invalid, 7342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [990 Valid, 6352 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 05:37:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5863 states. [2023-04-01 05:37:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5863 to 5613. [2023-04-01 05:37:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5613 states, 3863 states have (on average 1.4227284493916645) internal successors, (5496), 4081 states have internal predecessors, (5496), 1249 states have call successors, (1249), 432 states have call predecessors, (1249), 500 states have return successors, (1681), 1243 states have call predecessors, (1681), 1239 states have call successors, (1681) [2023-04-01 05:37:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 8426 transitions. [2023-04-01 05:37:16,078 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 8426 transitions. Word has length 166 [2023-04-01 05:37:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:16,078 INFO L495 AbstractCegarLoop]: Abstraction has 5613 states and 8426 transitions. [2023-04-01 05:37:16,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 5 states have call successors, (39), 4 states have call predecessors, (39), 6 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2023-04-01 05:37:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 8426 transitions. [2023-04-01 05:37:16,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 05:37:16,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:16,084 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:37:16,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-01 05:37:16,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 05:37:16,293 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:16,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:16,294 INFO L85 PathProgramCache]: Analyzing trace with hash 869912296, now seen corresponding path program 1 times [2023-04-01 05:37:16,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:16,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780720111] [2023-04-01 05:37:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:16,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 05:37:16,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:16,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780720111] [2023-04-01 05:37:16,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780720111] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:16,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404301129] [2023-04-01 05:37:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:16,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:16,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:16,606 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:37:16,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 05:37:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:17,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:37:17,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:37:17,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:37:17,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404301129] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:17,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:37:17,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 05:37:17,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279149368] [2023-04-01 05:37:17,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:17,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:37:17,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:17,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:37:17,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:37:17,208 INFO L87 Difference]: Start difference. First operand 5613 states and 8426 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-01 05:37:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:17,667 INFO L93 Difference]: Finished difference Result 13438 states and 20534 transitions. [2023-04-01 05:37:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:37:17,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 167 [2023-04-01 05:37:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:17,712 INFO L225 Difference]: With dead ends: 13438 [2023-04-01 05:37:17,713 INFO L226 Difference]: Without dead ends: 7856 [2023-04-01 05:37:17,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 168 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 05:37:17,733 INFO L413 NwaCegarLoop]: 780 mSDtfsCounter, 478 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:17,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1360 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:37:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7856 states. [2023-04-01 05:37:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7856 to 7718. [2023-04-01 05:37:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7718 states, 5329 states have (on average 1.4248451867142053) internal successors, (7593), 5640 states have internal predecessors, (7593), 1709 states have call successors, (1709), 577 states have call predecessors, (1709), 679 states have return successors, (2322), 1704 states have call predecessors, (2322), 1699 states have call successors, (2322) [2023-04-01 05:37:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7718 states to 7718 states and 11624 transitions. [2023-04-01 05:37:18,108 INFO L78 Accepts]: Start accepts. Automaton has 7718 states and 11624 transitions. Word has length 167 [2023-04-01 05:37:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:18,108 INFO L495 AbstractCegarLoop]: Abstraction has 7718 states and 11624 transitions. [2023-04-01 05:37:18,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-01 05:37:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 7718 states and 11624 transitions. [2023-04-01 05:37:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-01 05:37:18,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:18,116 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-04-01 05:37:18,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 05:37:18,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 05:37:18,324 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:18,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:18,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1887894147, now seen corresponding path program 1 times [2023-04-01 05:37:18,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:18,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677309521] [2023-04-01 05:37:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:18,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 05:37:18,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677309521] [2023-04-01 05:37:18,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677309521] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103381889] [2023-04-01 05:37:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:18,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:18,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:18,716 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:37:18,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 05:37:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:19,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 2786 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 05:37:19,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:37:19,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:37:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 05:37:19,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103381889] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:37:19,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250581343] [2023-04-01 05:37:20,018 INFO L159 IcfgInterpreter]: Started Sifa with 150 locations of interest [2023-04-01 05:37:20,018 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:37:20,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:37:20,024 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:37:20,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:37:21,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 166 for LOIs [2023-04-01 05:37:22,390 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 216 for LOIs [2023-04-01 05:37:24,733 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 216 for LOIs [2023-04-01 05:37:25,087 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 216 for LOIs [2023-04-01 05:37:29,996 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...