./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 06:48:18,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 06:48:18,272 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 06:48:18,277 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 06:48:18,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 06:48:18,307 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 06:48:18,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 06:48:18,308 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 06:48:18,308 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 06:48:18,309 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 06:48:18,309 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 06:48:18,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 06:48:18,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 06:48:18,316 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 06:48:18,316 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 06:48:18,317 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 06:48:18,317 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 06:48:18,317 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 06:48:18,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 06:48:18,318 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 06:48:18,318 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 06:48:18,318 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 06:48:18,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 06:48:18,319 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 06:48:18,319 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 06:48:18,319 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 06:48:18,319 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 06:48:18,319 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 06:48:18,320 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 06:48:18,320 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 06:48:18,320 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 06:48:18,320 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 06:48:18,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:48:18,321 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 06:48:18,321 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 06:48:18,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 06:48:18,321 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 06:48:18,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 06:48:18,322 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 06:48:18,324 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 06:48:18,326 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 06:48:18,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 06:48:18,326 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2024-10-13 06:48:18,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 06:48:18,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 06:48:18,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 06:48:18,643 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 06:48:18,644 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 06:48:18,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i [2024-10-13 06:48:20,210 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 06:48:20,503 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 06:48:20,503 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i [2024-10-13 06:48:20,527 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac3fd4f86/f44143951d274bb99221a20088cc08ba/FLAG576581790 [2024-10-13 06:48:20,543 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac3fd4f86/f44143951d274bb99221a20088cc08ba [2024-10-13 06:48:20,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 06:48:20,547 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 06:48:20,548 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 06:48:20,548 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 06:48:20,554 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 06:48:20,555 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:48:20" (1/1) ... [2024-10-13 06:48:20,556 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f9431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:20, skipping insertion in model container [2024-10-13 06:48:20,556 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:48:20" (1/1) ... [2024-10-13 06:48:20,608 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 06:48:21,144 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2024-10-13 06:48:21,152 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2024-10-13 06:48:21,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:48:21,181 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 06:48:21,244 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2024-10-13 06:48:21,249 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2024-10-13 06:48:21,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:48:21,318 INFO L204 MainTranslator]: Completed translation [2024-10-13 06:48:21,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21 WrapperNode [2024-10-13 06:48:21,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 06:48:21,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 06:48:21,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 06:48:21,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 06:48:21,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,357 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,401 INFO L138 Inliner]: procedures = 274, calls = 49, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 196 [2024-10-13 06:48:21,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 06:48:21,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 06:48:21,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 06:48:21,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 06:48:21,416 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,425 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,460 INFO L175 MemorySlicer]: Split 34 memory accesses to 4 slices as follows [2, 5, 3, 24]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 13 writes are split as follows [0, 0, 2, 11]. [2024-10-13 06:48:21,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,461 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,477 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,482 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,487 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,494 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 06:48:21,495 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 06:48:21,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 06:48:21,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 06:48:21,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (1/1) ... [2024-10-13 06:48:21,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:48:21,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:48:21,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 06:48:21,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 06:48:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-13 06:48:21,584 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-13 06:48:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-13 06:48:21,585 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-13 06:48:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 06:48:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 06:48:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 06:48:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 06:48:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 06:48:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 06:48:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 06:48:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 06:48:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 06:48:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 06:48:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 06:48:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 06:48:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 06:48:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 06:48:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 06:48:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 06:48:21,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 06:48:21,589 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 06:48:21,770 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 06:48:21,773 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 06:48:22,168 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 06:48:22,168 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 06:48:22,488 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 06:48:22,488 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 06:48:22,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:48:22 BoogieIcfgContainer [2024-10-13 06:48:22,489 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 06:48:22,493 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 06:48:22,493 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 06:48:22,497 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 06:48:22,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:48:20" (1/3) ... [2024-10-13 06:48:22,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d7f8df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:48:22, skipping insertion in model container [2024-10-13 06:48:22,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:48:21" (2/3) ... [2024-10-13 06:48:22,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d7f8df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:48:22, skipping insertion in model container [2024-10-13 06:48:22,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:48:22" (3/3) ... [2024-10-13 06:48:22,501 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2024-10-13 06:48:22,521 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 06:48:22,522 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-13 06:48:22,522 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 06:48:22,593 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 06:48:22,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 40 transitions, 94 flow [2024-10-13 06:48:22,670 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2024-10-13 06:48:22,670 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 06:48:22,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 7/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2024-10-13 06:48:22,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 40 transitions, 94 flow [2024-10-13 06:48:22,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 81 flow [2024-10-13 06:48:22,694 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:48:22,703 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@2527173b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:48:22,704 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 06:48:22,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:48:22,709 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 06:48:22,709 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:48:22,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:48:22,710 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 06:48:22,711 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:48:22,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:48:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash 528975, now seen corresponding path program 1 times [2024-10-13 06:48:22,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:48:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950715352] [2024-10-13 06:48:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:48:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:22,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:48:22,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950715352] [2024-10-13 06:48:22,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950715352] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:48:22,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:48:22,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:48:22,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177446181] [2024-10-13 06:48:22,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:48:22,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 06:48:22,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:48:22,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 06:48:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 06:48:22,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-10-13 06:48:22,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 81 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:22,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:48:22,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-10-13 06:48:22,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:48:23,198 INFO L124 PetriNetUnfolderBase]: 288/497 cut-off events. [2024-10-13 06:48:23,198 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-13 06:48:23,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 497 events. 288/497 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1956 event pairs, 197 based on Foata normal form. 15/435 useless extension candidates. Maximal degree in co-relation 910. Up to 458 conditions per place. [2024-10-13 06:48:23,207 INFO L140 encePairwiseOnDemand]: 38/40 looper letters, 25 selfloop transitions, 0 changer transitions 2/32 dead transitions. [2024-10-13 06:48:23,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 127 flow [2024-10-13 06:48:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 06:48:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 06:48:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 45 transitions. [2024-10-13 06:48:23,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-13 06:48:23,222 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 81 flow. Second operand 2 states and 45 transitions. [2024-10-13 06:48:23,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 127 flow [2024-10-13 06:48:23,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 06:48:23,252 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 64 flow [2024-10-13 06:48:23,257 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-10-13 06:48:23,263 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2024-10-13 06:48:23,263 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 64 flow [2024-10-13 06:48:23,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:23,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:48:23,267 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:48:23,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 06:48:23,268 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:48:23,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:48:23,270 INFO L85 PathProgramCache]: Analyzing trace with hash -976015666, now seen corresponding path program 1 times [2024-10-13 06:48:23,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:48:23,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055253442] [2024-10-13 06:48:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:23,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:48:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:23,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:48:23,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055253442] [2024-10-13 06:48:23,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055253442] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:48:23,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:48:23,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:48:23,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981025074] [2024-10-13 06:48:23,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:48:23,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:48:23,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:48:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:48:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:48:23,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-10-13 06:48:23,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:23,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:48:23,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-10-13 06:48:23,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:48:23,740 INFO L124 PetriNetUnfolderBase]: 147/301 cut-off events. [2024-10-13 06:48:23,741 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-13 06:48:23,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 301 events. 147/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1068 event pairs, 76 based on Foata normal form. 13/279 useless extension candidates. Maximal degree in co-relation 588. Up to 146 conditions per place. [2024-10-13 06:48:23,743 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 27 selfloop transitions, 2 changer transitions 4/38 dead transitions. [2024-10-13 06:48:23,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 149 flow [2024-10-13 06:48:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:48:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:48:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-10-13 06:48:23,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-13 06:48:23,746 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 64 flow. Second operand 3 states and 58 transitions. [2024-10-13 06:48:23,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 149 flow [2024-10-13 06:48:23,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 149 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 06:48:23,748 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 70 flow [2024-10-13 06:48:23,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-10-13 06:48:23,749 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-10-13 06:48:23,750 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 70 flow [2024-10-13 06:48:23,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:23,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:48:23,751 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:48:23,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 06:48:23,752 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:48:23,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:48:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash -840780127, now seen corresponding path program 1 times [2024-10-13 06:48:23,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:48:23,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350419942] [2024-10-13 06:48:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:23,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:48:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:23,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:48:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350419942] [2024-10-13 06:48:23,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350419942] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:48:23,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:48:23,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:48:23,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455491937] [2024-10-13 06:48:23,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:48:23,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:48:23,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:48:23,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:48:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:48:23,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-10-13 06:48:23,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:23,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:48:23,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-10-13 06:48:23,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:48:23,980 INFO L124 PetriNetUnfolderBase]: 149/306 cut-off events. [2024-10-13 06:48:23,981 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-13 06:48:23,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 306 events. 149/306 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1063 event pairs, 118 based on Foata normal form. 8/294 useless extension candidates. Maximal degree in co-relation 624. Up to 257 conditions per place. [2024-10-13 06:48:23,989 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 28 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-10-13 06:48:23,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 144 flow [2024-10-13 06:48:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:48:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:48:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-10-13 06:48:23,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-10-13 06:48:23,995 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 70 flow. Second operand 3 states and 55 transitions. [2024-10-13 06:48:23,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 144 flow [2024-10-13 06:48:23,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 06:48:23,998 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 78 flow [2024-10-13 06:48:24,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-10-13 06:48:24,002 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2024-10-13 06:48:24,002 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 78 flow [2024-10-13 06:48:24,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:24,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:48:24,002 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:48:24,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 06:48:24,003 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:48:24,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:48:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash 102576644, now seen corresponding path program 1 times [2024-10-13 06:48:24,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:48:24,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186598216] [2024-10-13 06:48:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:24,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:48:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:24,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:48:24,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186598216] [2024-10-13 06:48:24,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186598216] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:48:24,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:48:24,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:48:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690570814] [2024-10-13 06:48:24,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:48:24,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:48:24,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:48:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:48:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:48:24,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-10-13 06:48:24,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:24,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:48:24,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-10-13 06:48:24,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:48:24,302 INFO L124 PetriNetUnfolderBase]: 112/263 cut-off events. [2024-10-13 06:48:24,302 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-10-13 06:48:24,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 263 events. 112/263 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 913 event pairs, 33 based on Foata normal form. 10/257 useless extension candidates. Maximal degree in co-relation 543. Up to 142 conditions per place. [2024-10-13 06:48:24,306 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 28 selfloop transitions, 3 changer transitions 1/37 dead transitions. [2024-10-13 06:48:24,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 159 flow [2024-10-13 06:48:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:48:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:48:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-10-13 06:48:24,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-10-13 06:48:24,309 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 78 flow. Second operand 3 states and 57 transitions. [2024-10-13 06:48:24,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 159 flow [2024-10-13 06:48:24,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 155 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 06:48:24,311 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 80 flow [2024-10-13 06:48:24,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-10-13 06:48:24,312 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2024-10-13 06:48:24,313 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 80 flow [2024-10-13 06:48:24,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:24,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:48:24,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:48:24,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 06:48:24,314 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:48:24,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:48:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash -73938727, now seen corresponding path program 1 times [2024-10-13 06:48:24,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:48:24,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135903447] [2024-10-13 06:48:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:24,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:48:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:24,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:48:24,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135903447] [2024-10-13 06:48:24,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135903447] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:48:24,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192494998] [2024-10-13 06:48:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:24,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:48:24,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:48:24,397 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) [2024-10-13 06:48:24,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 06:48:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:24,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 06:48:24,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:48:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:24,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:48:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:24,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192494998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:48:24,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:48:24,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-13 06:48:24,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197257494] [2024-10-13 06:48:24,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:48:24,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 06:48:24,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:48:24,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 06:48:24,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 06:48:24,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-10-13 06:48:24,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:24,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:48:24,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-10-13 06:48:24,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:48:24,780 INFO L124 PetriNetUnfolderBase]: 130/281 cut-off events. [2024-10-13 06:48:24,781 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-10-13 06:48:24,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 281 events. 130/281 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 898 event pairs, 90 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 641. Up to 207 conditions per place. [2024-10-13 06:48:24,783 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 39 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-10-13 06:48:24,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 220 flow [2024-10-13 06:48:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 06:48:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 06:48:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-10-13 06:48:24,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-10-13 06:48:24,786 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 80 flow. Second operand 6 states and 95 transitions. [2024-10-13 06:48:24,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 220 flow [2024-10-13 06:48:24,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:48:24,787 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 113 flow [2024-10-13 06:48:24,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=113, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-10-13 06:48:24,790 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2024-10-13 06:48:24,791 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 113 flow [2024-10-13 06:48:24,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:24,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:48:24,792 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:48:24,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 06:48:24,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:48:24,997 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:48:24,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:48:24,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1806582274, now seen corresponding path program 2 times [2024-10-13 06:48:24,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:48:24,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088418218] [2024-10-13 06:48:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:24,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:48:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:25,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:48:25,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088418218] [2024-10-13 06:48:25,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088418218] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:48:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884385040] [2024-10-13 06:48:25,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 06:48:25,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:48:25,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:48:25,150 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) [2024-10-13 06:48:25,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 06:48:25,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 06:48:25,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 06:48:25,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 06:48:25,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:48:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:25,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:48:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:25,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884385040] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:48:25,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:48:25,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-13 06:48:25,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022925219] [2024-10-13 06:48:25,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:48:25,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 06:48:25,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:48:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 06:48:25,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-13 06:48:25,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-10-13 06:48:25,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 113 flow. Second operand has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:25,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:48:25,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-10-13 06:48:25,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:48:25,712 INFO L124 PetriNetUnfolderBase]: 166/353 cut-off events. [2024-10-13 06:48:25,712 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-10-13 06:48:25,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 353 events. 166/353 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1097 event pairs, 90 based on Foata normal form. 36/374 useless extension candidates. Maximal degree in co-relation 921. Up to 207 conditions per place. [2024-10-13 06:48:25,717 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 63 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-10-13 06:48:25,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 397 flow [2024-10-13 06:48:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 06:48:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 06:48:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 176 transitions. [2024-10-13 06:48:25,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-10-13 06:48:25,719 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 113 flow. Second operand 12 states and 176 transitions. [2024-10-13 06:48:25,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 397 flow [2024-10-13 06:48:25,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 383 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 06:48:25,727 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 183 flow [2024-10-13 06:48:25,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=183, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2024-10-13 06:48:25,728 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2024-10-13 06:48:25,730 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 183 flow [2024-10-13 06:48:25,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:25,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:48:25,731 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:48:25,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 06:48:25,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 06:48:25,936 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:48:25,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:48:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash -207915810, now seen corresponding path program 3 times [2024-10-13 06:48:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:48:25,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692180936] [2024-10-13 06:48:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:48:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:26,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:48:26,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692180936] [2024-10-13 06:48:26,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692180936] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:48:26,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402246545] [2024-10-13 06:48:26,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 06:48:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:48:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:48:26,377 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) [2024-10-13 06:48:26,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 06:48:30,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-13 06:48:30,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 06:48:30,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 06:48:30,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:48:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:30,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:48:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:30,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402246545] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:48:30,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:48:30,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-10-13 06:48:30,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865090485] [2024-10-13 06:48:30,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:48:30,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-13 06:48:30,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:48:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-13 06:48:30,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-13 06:48:30,546 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-10-13 06:48:30,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 183 flow. Second operand has 25 states, 25 states have (on average 9.68) internal successors, (242), 25 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:30,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:48:30,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-10-13 06:48:30,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:48:30,974 INFO L124 PetriNetUnfolderBase]: 238/497 cut-off events. [2024-10-13 06:48:30,974 INFO L125 PetriNetUnfolderBase]: For 2908/2908 co-relation queries the response was YES. [2024-10-13 06:48:30,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1568 conditions, 497 events. 238/497 cut-off events. For 2908/2908 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1495 event pairs, 90 based on Foata normal form. 72/554 useless extension candidates. Maximal degree in co-relation 1551. Up to 207 conditions per place. [2024-10-13 06:48:30,979 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 111 selfloop transitions, 23 changer transitions 0/139 dead transitions. [2024-10-13 06:48:30,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 139 transitions, 767 flow [2024-10-13 06:48:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 06:48:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 06:48:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 338 transitions. [2024-10-13 06:48:30,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35208333333333336 [2024-10-13 06:48:30,986 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 183 flow. Second operand 24 states and 338 transitions. [2024-10-13 06:48:30,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 139 transitions, 767 flow [2024-10-13 06:48:30,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 139 transitions, 695 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-10-13 06:48:30,998 INFO L231 Difference]: Finished difference. Result has 88 places, 51 transitions, 303 flow [2024-10-13 06:48:30,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=303, PETRI_PLACES=88, PETRI_TRANSITIONS=51} [2024-10-13 06:48:31,000 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 52 predicate places. [2024-10-13 06:48:31,002 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 51 transitions, 303 flow [2024-10-13 06:48:31,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.68) internal successors, (242), 25 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:31,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:48:31,002 INFO L204 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:48:31,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 06:48:31,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:48:31,204 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:48:31,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:48:31,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2100893026, now seen corresponding path program 4 times [2024-10-13 06:48:31,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:48:31,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310676437] [2024-10-13 06:48:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:31,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:48:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:32,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:48:32,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310676437] [2024-10-13 06:48:32,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310676437] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:48:32,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130388663] [2024-10-13 06:48:32,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 06:48:32,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:48:32,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:48:32,253 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) [2024-10-13 06:48:32,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 06:48:32,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 06:48:32,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 06:48:32,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 06:48:32,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:48:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:32,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:48:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:33,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130388663] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:48:33,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:48:33,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-10-13 06:48:33,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651302532] [2024-10-13 06:48:33,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:48:33,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-13 06:48:33,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:48:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-13 06:48:33,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 06:48:33,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-10-13 06:48:33,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 51 transitions, 303 flow. Second operand has 49 states, 49 states have (on average 9.346938775510203) internal successors, (458), 49 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:33,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:48:33,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-10-13 06:48:33,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:48:34,272 INFO L124 PetriNetUnfolderBase]: 382/785 cut-off events. [2024-10-13 06:48:34,272 INFO L125 PetriNetUnfolderBase]: For 31600/31600 co-relation queries the response was YES. [2024-10-13 06:48:34,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 785 events. 382/785 cut-off events. For 31600/31600 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2286 event pairs, 90 based on Foata normal form. 144/914 useless extension candidates. Maximal degree in co-relation 2679. Up to 235 conditions per place. [2024-10-13 06:48:34,280 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 207 selfloop transitions, 47 changer transitions 0/259 dead transitions. [2024-10-13 06:48:34,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 259 transitions, 1463 flow [2024-10-13 06:48:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-13 06:48:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-10-13 06:48:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 662 transitions. [2024-10-13 06:48:34,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34479166666666666 [2024-10-13 06:48:34,284 INFO L175 Difference]: Start difference. First operand has 88 places, 51 transitions, 303 flow. Second operand 48 states and 662 transitions. [2024-10-13 06:48:34,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 259 transitions, 1463 flow [2024-10-13 06:48:34,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 259 transitions, 1319 flow, removed 61 selfloop flow, removed 11 redundant places. [2024-10-13 06:48:34,302 INFO L231 Difference]: Finished difference. Result has 148 places, 75 transitions, 543 flow [2024-10-13 06:48:34,303 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=543, PETRI_PLACES=148, PETRI_TRANSITIONS=75} [2024-10-13 06:48:34,303 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 112 predicate places. [2024-10-13 06:48:34,304 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 75 transitions, 543 flow [2024-10-13 06:48:34,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 9.346938775510203) internal successors, (458), 49 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:48:34,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:48:34,304 INFO L204 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:48:34,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 06:48:34,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:48:34,505 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:48:34,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:48:34,506 INFO L85 PathProgramCache]: Analyzing trace with hash 591787550, now seen corresponding path program 5 times [2024-10-13 06:48:34,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:48:34,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683726098] [2024-10-13 06:48:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:48:34,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:48:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:48:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:48:37,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:48:37,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683726098] [2024-10-13 06:48:37,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683726098] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:48:37,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801071985] [2024-10-13 06:48:37,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 06:48:37,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:48:37,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:48:37,614 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) [2024-10-13 06:48:37,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process