./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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/weaver/chl-word-subst.wvr.c -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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:37:04,469 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:37:04,540 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:37:04,544 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:37:04,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:37:04,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:37:04,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:37:04,573 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:37:04,574 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:37:04,574 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:37:04,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:37:04,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:37:04,575 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:37:04,577 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:37:04,578 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:37:04,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:37:04,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:37:04,579 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:37:04,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:37:04,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:37:04,579 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:37:04,583 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:37:04,583 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:37:04,584 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:37:04,584 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:37:04,584 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:37:04,584 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:37:04,584 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:37:04,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:37:04,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:37:04,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:37:04,585 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:37:04,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:37:04,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:37:04,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:37:04,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:37:04,586 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:37:04,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:37:04,587 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:37:04,587 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:37:04,587 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:37:04,589 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:37:04,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2024-11-20 09:37:04,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:37:04,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:37:04,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:37:04,906 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:37:04,907 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:37:04,908 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-20 09:37:06,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:37:06,551 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:37:06,552 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-20 09:37:06,560 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c3d52cc/ffef66bf0475452b9b39931fdda339af/FLAG5d7db8e80 [2024-11-20 09:37:06,919 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c3d52cc/ffef66bf0475452b9b39931fdda339af [2024-11-20 09:37:06,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:37:06,922 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:37:06,924 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:37:06,924 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:37:06,929 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:37:06,930 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:37:06" (1/1) ... [2024-11-20 09:37:06,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d39572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:06, skipping insertion in model container [2024-11-20 09:37:06,931 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:37:06" (1/1) ... [2024-11-20 09:37:06,959 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:37:07,186 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3384,3397] [2024-11-20 09:37:07,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:37:07,202 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:37:07,239 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3384,3397] [2024-11-20 09:37:07,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:37:07,273 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:37:07,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07 WrapperNode [2024-11-20 09:37:07,274 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:37:07,275 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:37:07,275 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:37:07,276 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:37:07,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,290 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,312 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 169 [2024-11-20 09:37:07,313 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:37:07,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:37:07,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:37:07,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:37:07,326 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,332 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,352 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-20 09:37:07,353 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,353 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,361 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:37:07,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:37:07,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:37:07,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:37:07,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (1/1) ... [2024-11-20 09:37:07,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:37:07,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:37:07,407 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) [2024-11-20 09:37:07,410 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 [2024-11-20 09:37:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:37:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:37:07,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:37:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:37:07,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:37:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 09:37:07,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 09:37:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:37:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:37:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:37:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:37:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:37:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:37:07,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:37:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:37:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:37:07,457 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:37:07,607 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:37:07,608 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:37:08,060 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:37:08,064 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:37:08,385 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:37:08,387 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-20 09:37:08,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:37:08 BoogieIcfgContainer [2024-11-20 09:37:08,387 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:37:08,390 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:37:08,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:37:08,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:37:08,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:37:06" (1/3) ... [2024-11-20 09:37:08,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239aa2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:37:08, skipping insertion in model container [2024-11-20 09:37:08,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:37:07" (2/3) ... [2024-11-20 09:37:08,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239aa2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:37:08, skipping insertion in model container [2024-11-20 09:37:08,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:37:08" (3/3) ... [2024-11-20 09:37:08,399 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2024-11-20 09:37:08,416 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:37:08,417 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:37:08,417 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:37:08,478 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 09:37:08,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 49 transitions, 119 flow [2024-11-20 09:37:08,558 INFO L124 PetriNetUnfolderBase]: 12/46 cut-off events. [2024-11-20 09:37:08,559 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 09:37:08,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 12/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-20 09:37:08,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 49 transitions, 119 flow [2024-11-20 09:37:08,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 45 transitions, 108 flow [2024-11-20 09:37:08,574 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:37:08,581 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;@7f3f4ea2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:37:08,582 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-20 09:37:08,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:37:08,603 INFO L124 PetriNetUnfolderBase]: 12/44 cut-off events. [2024-11-20 09:37:08,603 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 09:37:08,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:08,604 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, 1, 1, 1] [2024-11-20 09:37:08,605 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 1 more)] === [2024-11-20 09:37:08,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:08,610 INFO L85 PathProgramCache]: Analyzing trace with hash -220026163, now seen corresponding path program 1 times [2024-11-20 09:37:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:08,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548059482] [2024-11-20 09:37:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:08,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:09,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:09,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548059482] [2024-11-20 09:37:09,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548059482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:09,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:09,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:37:09,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219884689] [2024-11-20 09:37:09,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:09,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:37:09,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:09,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:37:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:37:09,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:09,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-11-20 09:37:09,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:09,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:09,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:09,827 INFO L124 PetriNetUnfolderBase]: 3738/4998 cut-off events. [2024-11-20 09:37:09,827 INFO L125 PetriNetUnfolderBase]: For 277/277 co-relation queries the response was YES. [2024-11-20 09:37:09,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10276 conditions, 4998 events. 3738/4998 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20524 event pairs, 1692 based on Foata normal form. 1/3664 useless extension candidates. Maximal degree in co-relation 9368. Up to 3459 conditions per place. [2024-11-20 09:37:09,860 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 65 selfloop transitions, 2 changer transitions 5/73 dead transitions. [2024-11-20 09:37:09,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 73 transitions, 323 flow [2024-11-20 09:37:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:37:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:37:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-20 09:37:09,872 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-11-20 09:37:09,874 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 108 flow. Second operand 3 states and 85 transitions. [2024-11-20 09:37:09,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 73 transitions, 323 flow [2024-11-20 09:37:09,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 301 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 09:37:09,889 INFO L231 Difference]: Finished difference. Result has 40 places, 45 transitions, 106 flow [2024-11-20 09:37:09,892 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=40, PETRI_TRANSITIONS=45} [2024-11-20 09:37:09,895 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2024-11-20 09:37:09,896 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 45 transitions, 106 flow [2024-11-20 09:37:09,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-11-20 09:37:09,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:09,896 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, 1, 1, 1, 1, 1] [2024-11-20 09:37:09,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:37:09,897 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:09,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1290270659, now seen corresponding path program 1 times [2024-11-20 09:37:09,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462140308] [2024-11-20 09:37:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:09,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:10,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:10,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462140308] [2024-11-20 09:37:10,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462140308] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:10,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:10,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 09:37:10,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171629245] [2024-11-20 09:37:10,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:10,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:37:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:37:10,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:37:10,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:10,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 45 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2024-11-20 09:37:10,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:10,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:10,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:11,630 INFO L124 PetriNetUnfolderBase]: 3507/4756 cut-off events. [2024-11-20 09:37:11,631 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-11-20 09:37:11,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10209 conditions, 4756 events. 3507/4756 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20957 event pairs, 377 based on Foata normal form. 1/3751 useless extension candidates. Maximal degree in co-relation 8283. Up to 3012 conditions per place. [2024-11-20 09:37:11,661 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 87 selfloop transitions, 9 changer transitions 14/111 dead transitions. [2024-11-20 09:37:11,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 111 transitions, 485 flow [2024-11-20 09:37:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:37:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:37:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-11-20 09:37:11,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-11-20 09:37:11,664 INFO L175 Difference]: Start difference. First operand has 40 places, 45 transitions, 106 flow. Second operand 6 states and 132 transitions. [2024-11-20 09:37:11,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 111 transitions, 485 flow [2024-11-20 09:37:11,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 111 transitions, 475 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-20 09:37:11,687 INFO L231 Difference]: Finished difference. Result has 49 places, 52 transitions, 170 flow [2024-11-20 09:37:11,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=52} [2024-11-20 09:37:11,688 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-11-20 09:37:11,688 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 52 transitions, 170 flow [2024-11-20 09:37:11,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2024-11-20 09:37:11,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:11,689 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, 1, 1, 1, 1, 1] [2024-11-20 09:37:11,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:37:11,689 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:11,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash 510529653, now seen corresponding path program 2 times [2024-11-20 09:37:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925401541] [2024-11-20 09:37:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:11,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:12,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925401541] [2024-11-20 09:37:12,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925401541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:12,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:12,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:37:12,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937182225] [2024-11-20 09:37:12,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:12,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:37:12,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:37:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:37:12,150 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:12,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 52 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-20 09:37:12,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:12,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:12,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:12,765 INFO L124 PetriNetUnfolderBase]: 4215/5817 cut-off events. [2024-11-20 09:37:12,766 INFO L125 PetriNetUnfolderBase]: For 1352/1352 co-relation queries the response was YES. [2024-11-20 09:37:12,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13038 conditions, 5817 events. 4215/5817 cut-off events. For 1352/1352 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25580 event pairs, 2040 based on Foata normal form. 1/4988 useless extension candidates. Maximal degree in co-relation 13014. Up to 3779 conditions per place. [2024-11-20 09:37:12,803 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 88 selfloop transitions, 3 changer transitions 15/107 dead transitions. [2024-11-20 09:37:12,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 107 transitions, 534 flow [2024-11-20 09:37:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:37:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:37:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-20 09:37:12,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47346938775510206 [2024-11-20 09:37:12,806 INFO L175 Difference]: Start difference. First operand has 49 places, 52 transitions, 170 flow. Second operand 5 states and 116 transitions. [2024-11-20 09:37:12,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 107 transitions, 534 flow [2024-11-20 09:37:12,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 107 transitions, 528 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-20 09:37:12,817 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 188 flow [2024-11-20 09:37:12,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-11-20 09:37:12,819 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-11-20 09:37:12,819 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 188 flow [2024-11-20 09:37:12,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-20 09:37:12,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:12,820 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, 1, 1, 1, 1, 1] [2024-11-20 09:37:12,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:37:12,820 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:12,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:12,821 INFO L85 PathProgramCache]: Analyzing trace with hash -574546763, now seen corresponding path program 3 times [2024-11-20 09:37:12,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:12,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063542629] [2024-11-20 09:37:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:12,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:13,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:13,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063542629] [2024-11-20 09:37:13,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063542629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:13,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:13,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:37:13,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889383498] [2024-11-20 09:37:13,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:13,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:37:13,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:13,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:37:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:37:13,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:13,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-20 09:37:13,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:13,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:13,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:13,899 INFO L124 PetriNetUnfolderBase]: 4645/6434 cut-off events. [2024-11-20 09:37:13,899 INFO L125 PetriNetUnfolderBase]: For 2951/2951 co-relation queries the response was YES. [2024-11-20 09:37:13,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14892 conditions, 6434 events. 4645/6434 cut-off events. For 2951/2951 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30979 event pairs, 683 based on Foata normal form. 1/5525 useless extension candidates. Maximal degree in co-relation 14861. Up to 4403 conditions per place. [2024-11-20 09:37:13,934 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 92 selfloop transitions, 3 changer transitions 15/111 dead transitions. [2024-11-20 09:37:13,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 111 transitions, 563 flow [2024-11-20 09:37:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:37:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:37:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-20 09:37:13,936 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-11-20 09:37:13,936 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 188 flow. Second operand 5 states and 120 transitions. [2024-11-20 09:37:13,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 111 transitions, 563 flow [2024-11-20 09:37:13,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 111 transitions, 552 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-20 09:37:13,983 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 203 flow [2024-11-20 09:37:13,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-11-20 09:37:13,985 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-11-20 09:37:13,985 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 203 flow [2024-11-20 09:37:13,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-20 09:37:13,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:13,986 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, 1, 1, 1, 1, 1] [2024-11-20 09:37:13,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:37:13,986 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:13,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -330068201, now seen corresponding path program 4 times [2024-11-20 09:37:13,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:13,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628319546] [2024-11-20 09:37:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:13,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:14,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:14,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628319546] [2024-11-20 09:37:14,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628319546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:14,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:14,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 09:37:14,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100643871] [2024-11-20 09:37:14,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:14,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:37:14,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:37:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:37:14,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:14,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 203 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2024-11-20 09:37:14,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:14,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:14,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:15,334 INFO L124 PetriNetUnfolderBase]: 5270/7359 cut-off events. [2024-11-20 09:37:15,334 INFO L125 PetriNetUnfolderBase]: For 5567/5567 co-relation queries the response was YES. [2024-11-20 09:37:15,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17409 conditions, 7359 events. 5270/7359 cut-off events. For 5567/5567 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34046 event pairs, 2962 based on Foata normal form. 1/6346 useless extension candidates. Maximal degree in co-relation 17368. Up to 5333 conditions per place. [2024-11-20 09:37:15,366 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 80 selfloop transitions, 11 changer transitions 16/108 dead transitions. [2024-11-20 09:37:15,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 108 transitions, 586 flow [2024-11-20 09:37:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:37:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:37:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-20 09:37:15,369 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-11-20 09:37:15,370 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 203 flow. Second operand 6 states and 124 transitions. [2024-11-20 09:37:15,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 108 transitions, 586 flow [2024-11-20 09:37:15,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 108 transitions, 570 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-20 09:37:15,389 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 242 flow [2024-11-20 09:37:15,389 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-11-20 09:37:15,390 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-11-20 09:37:15,390 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 242 flow [2024-11-20 09:37:15,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2024-11-20 09:37:15,391 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:15,391 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, 1, 1, 1, 1, 1] [2024-11-20 09:37:15,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 09:37:15,391 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:15,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:15,392 INFO L85 PathProgramCache]: Analyzing trace with hash -458472143, now seen corresponding path program 5 times [2024-11-20 09:37:15,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:15,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172265052] [2024-11-20 09:37:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:15,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:15,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:15,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172265052] [2024-11-20 09:37:15,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172265052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:15,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:15,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:37:15,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877292575] [2024-11-20 09:37:15,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:15,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:37:15,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:15,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:37:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:37:15,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:15,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-20 09:37:15,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:15,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:15,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:16,553 INFO L124 PetriNetUnfolderBase]: 5153/7169 cut-off events. [2024-11-20 09:37:16,554 INFO L125 PetriNetUnfolderBase]: For 6533/6533 co-relation queries the response was YES. [2024-11-20 09:37:16,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17299 conditions, 7169 events. 5153/7169 cut-off events. For 6533/6533 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33292 event pairs, 2769 based on Foata normal form. 1/6164 useless extension candidates. Maximal degree in co-relation 17261. Up to 5151 conditions per place. [2024-11-20 09:37:16,673 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 97 selfloop transitions, 4 changer transitions 14/116 dead transitions. [2024-11-20 09:37:16,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 116 transitions, 635 flow [2024-11-20 09:37:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:37:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:37:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-11-20 09:37:16,675 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5020408163265306 [2024-11-20 09:37:16,675 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 242 flow. Second operand 5 states and 123 transitions. [2024-11-20 09:37:16,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 116 transitions, 635 flow [2024-11-20 09:37:16,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 116 transitions, 615 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-20 09:37:16,700 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 238 flow [2024-11-20 09:37:16,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-11-20 09:37:16,701 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-11-20 09:37:16,701 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 238 flow [2024-11-20 09:37:16,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-20 09:37:16,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:16,702 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, 1, 1, 1, 1, 1] [2024-11-20 09:37:16,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:37:16,702 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:16,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:16,703 INFO L85 PathProgramCache]: Analyzing trace with hash 871185299, now seen corresponding path program 6 times [2024-11-20 09:37:16,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:16,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578211210] [2024-11-20 09:37:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:16,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:16,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:16,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578211210] [2024-11-20 09:37:16,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578211210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:16,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:16,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:37:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320754686] [2024-11-20 09:37:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:16,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:37:16,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:37:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:37:16,992 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:16,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-20 09:37:16,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:16,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:16,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:17,746 INFO L124 PetriNetUnfolderBase]: 5041/7000 cut-off events. [2024-11-20 09:37:17,747 INFO L125 PetriNetUnfolderBase]: For 7038/7038 co-relation queries the response was YES. [2024-11-20 09:37:17,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16863 conditions, 7000 events. 5041/7000 cut-off events. For 7038/7038 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31621 event pairs, 2870 based on Foata normal form. 1/6003 useless extension candidates. Maximal degree in co-relation 16828. Up to 5338 conditions per place. [2024-11-20 09:37:17,784 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 94 selfloop transitions, 3 changer transitions 14/112 dead transitions. [2024-11-20 09:37:17,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 112 transitions, 613 flow [2024-11-20 09:37:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:37:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:37:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-11-20 09:37:17,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-11-20 09:37:17,786 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 238 flow. Second operand 5 states and 119 transitions. [2024-11-20 09:37:17,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 112 transitions, 613 flow [2024-11-20 09:37:17,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 112 transitions, 602 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-20 09:37:17,811 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 240 flow [2024-11-20 09:37:17,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-11-20 09:37:17,812 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-11-20 09:37:17,812 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 240 flow [2024-11-20 09:37:17,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-20 09:37:17,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:17,813 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:17,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:37:17,813 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:17,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:17,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2016084104, now seen corresponding path program 1 times [2024-11-20 09:37:17,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:17,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220643453] [2024-11-20 09:37:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:17,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:17,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:17,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220643453] [2024-11-20 09:37:17,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220643453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:17,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:17,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:17,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145090378] [2024-11-20 09:37:17,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:17,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:17,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:17,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:17,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:17,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:17,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:17,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:18,415 INFO L124 PetriNetUnfolderBase]: 6044/8410 cut-off events. [2024-11-20 09:37:18,416 INFO L125 PetriNetUnfolderBase]: For 9162/9162 co-relation queries the response was YES. [2024-11-20 09:37:18,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20007 conditions, 8410 events. 6044/8410 cut-off events. For 9162/9162 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40729 event pairs, 477 based on Foata normal form. 66/7236 useless extension candidates. Maximal degree in co-relation 19964. Up to 5299 conditions per place. [2024-11-20 09:37:18,476 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 94 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2024-11-20 09:37:18,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 101 transitions, 582 flow [2024-11-20 09:37:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:37:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:37:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-20 09:37:18,478 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-20 09:37:18,479 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 240 flow. Second operand 4 states and 105 transitions. [2024-11-20 09:37:18,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 101 transitions, 582 flow [2024-11-20 09:37:18,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 101 transitions, 573 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-20 09:37:18,503 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 296 flow [2024-11-20 09:37:18,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-11-20 09:37:18,504 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-11-20 09:37:18,504 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 296 flow [2024-11-20 09:37:18,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:18,504 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:18,505 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:18,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 09:37:18,505 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:18,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:18,506 INFO L85 PathProgramCache]: Analyzing trace with hash 895690072, now seen corresponding path program 2 times [2024-11-20 09:37:18,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:18,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476407686] [2024-11-20 09:37:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:18,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:18,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:18,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476407686] [2024-11-20 09:37:18,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476407686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:18,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:18,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:18,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057752669] [2024-11-20 09:37:18,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:18,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:18,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:18,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:18,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:18,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:18,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:18,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:18,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:18,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:19,246 INFO L124 PetriNetUnfolderBase]: 5676/7907 cut-off events. [2024-11-20 09:37:19,247 INFO L125 PetriNetUnfolderBase]: For 8509/8509 co-relation queries the response was YES. [2024-11-20 09:37:19,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19576 conditions, 7907 events. 5676/7907 cut-off events. For 8509/8509 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 37476 event pairs, 637 based on Foata normal form. 66/6805 useless extension candidates. Maximal degree in co-relation 19511. Up to 4823 conditions per place. [2024-11-20 09:37:19,304 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 99 selfloop transitions, 8 changer transitions 0/108 dead transitions. [2024-11-20 09:37:19,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 108 transitions, 688 flow [2024-11-20 09:37:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:37:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:37:19,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-20 09:37:19,306 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-20 09:37:19,306 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 296 flow. Second operand 4 states and 105 transitions. [2024-11-20 09:37:19,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 108 transitions, 688 flow [2024-11-20 09:37:19,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 688 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 09:37:19,339 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 385 flow [2024-11-20 09:37:19,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=385, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2024-11-20 09:37:19,341 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-11-20 09:37:19,341 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 385 flow [2024-11-20 09:37:19,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:19,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:19,342 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:19,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 09:37:19,343 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:19,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1223396110, now seen corresponding path program 3 times [2024-11-20 09:37:19,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:19,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259122811] [2024-11-20 09:37:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:19,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:19,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:19,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259122811] [2024-11-20 09:37:19,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259122811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:19,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:19,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:19,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822722696] [2024-11-20 09:37:19,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:19,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:19,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:19,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:19,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:19,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:19,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:19,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:20,096 INFO L124 PetriNetUnfolderBase]: 5348/7444 cut-off events. [2024-11-20 09:37:20,096 INFO L125 PetriNetUnfolderBase]: For 10280/10280 co-relation queries the response was YES. [2024-11-20 09:37:20,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19373 conditions, 7444 events. 5348/7444 cut-off events. For 10280/10280 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 35152 event pairs, 1270 based on Foata normal form. 26/6374 useless extension candidates. Maximal degree in co-relation 19305. Up to 5180 conditions per place. [2024-11-20 09:37:20,133 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 99 selfloop transitions, 11 changer transitions 2/113 dead transitions. [2024-11-20 09:37:20,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 113 transitions, 742 flow [2024-11-20 09:37:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:37:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:37:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-11-20 09:37:20,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4775510204081633 [2024-11-20 09:37:20,135 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 385 flow. Second operand 5 states and 117 transitions. [2024-11-20 09:37:20,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 113 transitions, 742 flow [2024-11-20 09:37:20,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 113 transitions, 740 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-20 09:37:20,166 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 415 flow [2024-11-20 09:37:20,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-11-20 09:37:20,167 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-11-20 09:37:20,167 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 415 flow [2024-11-20 09:37:20,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:20,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:20,168 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:20,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 09:37:20,168 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:20,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:20,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1591909984, now seen corresponding path program 1 times [2024-11-20 09:37:20,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:20,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695106890] [2024-11-20 09:37:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:20,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:20,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:20,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695106890] [2024-11-20 09:37:20,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695106890] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:20,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:20,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:20,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577007985] [2024-11-20 09:37:20,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:20,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:20,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:20,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:20,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:20,245 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:20,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 415 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:20,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:20,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:20,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:20,753 INFO L124 PetriNetUnfolderBase]: 6218/8668 cut-off events. [2024-11-20 09:37:20,754 INFO L125 PetriNetUnfolderBase]: For 13282/13282 co-relation queries the response was YES. [2024-11-20 09:37:20,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22214 conditions, 8668 events. 6218/8668 cut-off events. For 13282/13282 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42392 event pairs, 982 based on Foata normal form. 65/7425 useless extension candidates. Maximal degree in co-relation 22144. Up to 5977 conditions per place. [2024-11-20 09:37:20,811 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 97 selfloop transitions, 10 changer transitions 0/108 dead transitions. [2024-11-20 09:37:20,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 754 flow [2024-11-20 09:37:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:37:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:37:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-20 09:37:20,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-11-20 09:37:20,813 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 415 flow. Second operand 4 states and 104 transitions. [2024-11-20 09:37:20,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 754 flow [2024-11-20 09:37:20,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 108 transitions, 719 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-20 09:37:20,856 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 444 flow [2024-11-20 09:37:20,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=444, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-11-20 09:37:20,857 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-11-20 09:37:20,857 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 444 flow [2024-11-20 09:37:20,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:20,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:20,858 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:20,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 09:37:20,858 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:20,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:20,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1076861620, now seen corresponding path program 2 times [2024-11-20 09:37:20,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:20,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763275769] [2024-11-20 09:37:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:20,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:20,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:20,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763275769] [2024-11-20 09:37:20,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763275769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:20,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:20,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:20,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308349310] [2024-11-20 09:37:20,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:20,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:20,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:20,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:20,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 444 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:20,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:20,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:20,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:21,448 INFO L124 PetriNetUnfolderBase]: 5884/8196 cut-off events. [2024-11-20 09:37:21,449 INFO L125 PetriNetUnfolderBase]: For 10758/10758 co-relation queries the response was YES. [2024-11-20 09:37:21,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21569 conditions, 8196 events. 5884/8196 cut-off events. For 10758/10758 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 39474 event pairs, 1560 based on Foata normal form. 27/6989 useless extension candidates. Maximal degree in co-relation 21501. Up to 5822 conditions per place. [2024-11-20 09:37:21,482 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 105 selfloop transitions, 11 changer transitions 3/120 dead transitions. [2024-11-20 09:37:21,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 825 flow [2024-11-20 09:37:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:37:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:37:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-20 09:37:21,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-11-20 09:37:21,484 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 444 flow. Second operand 5 states and 120 transitions. [2024-11-20 09:37:21,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 825 flow [2024-11-20 09:37:21,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 120 transitions, 807 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-20 09:37:21,512 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 478 flow [2024-11-20 09:37:21,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=478, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2024-11-20 09:37:21,514 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-11-20 09:37:21,515 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 478 flow [2024-11-20 09:37:21,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:21,516 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:21,516 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:21,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 09:37:21,516 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:21,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash 542634404, now seen corresponding path program 3 times [2024-11-20 09:37:21,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:21,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284871101] [2024-11-20 09:37:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:21,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:21,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:21,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284871101] [2024-11-20 09:37:21,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284871101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:21,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:21,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:21,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737208791] [2024-11-20 09:37:21,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:21,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:21,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:21,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:21,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:21,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:21,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:21,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:22,125 INFO L124 PetriNetUnfolderBase]: 5222/7261 cut-off events. [2024-11-20 09:37:22,126 INFO L125 PetriNetUnfolderBase]: For 12533/12533 co-relation queries the response was YES. [2024-11-20 09:37:22,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19390 conditions, 7261 events. 5222/7261 cut-off events. For 12533/12533 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33784 event pairs, 2384 based on Foata normal form. 53/6226 useless extension candidates. Maximal degree in co-relation 19321. Up to 4857 conditions per place. [2024-11-20 09:37:22,151 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 118 selfloop transitions, 7 changer transitions 6/132 dead transitions. [2024-11-20 09:37:22,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 132 transitions, 882 flow [2024-11-20 09:37:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:37:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:37:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-20 09:37:22,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5224489795918368 [2024-11-20 09:37:22,152 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 478 flow. Second operand 5 states and 128 transitions. [2024-11-20 09:37:22,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 132 transitions, 882 flow [2024-11-20 09:37:22,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 132 transitions, 868 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-20 09:37:22,173 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 443 flow [2024-11-20 09:37:22,173 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=443, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2024-11-20 09:37:22,174 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-11-20 09:37:22,174 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 443 flow [2024-11-20 09:37:22,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:22,174 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:22,174 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:22,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 09:37:22,174 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:22,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:22,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1097262630, now seen corresponding path program 4 times [2024-11-20 09:37:22,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:22,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326109755] [2024-11-20 09:37:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:22,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:22,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:22,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326109755] [2024-11-20 09:37:22,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326109755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:22,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:22,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:22,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887289757] [2024-11-20 09:37:22,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:22,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:22,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:22,294 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:22,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 443 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:22,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:22,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:22,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:22,781 INFO L124 PetriNetUnfolderBase]: 4621/6392 cut-off events. [2024-11-20 09:37:22,781 INFO L125 PetriNetUnfolderBase]: For 11663/11663 co-relation queries the response was YES. [2024-11-20 09:37:22,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16924 conditions, 6392 events. 4621/6392 cut-off events. For 11663/11663 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 28377 event pairs, 1094 based on Foata normal form. 65/5463 useless extension candidates. Maximal degree in co-relation 16854. Up to 5031 conditions per place. [2024-11-20 09:37:22,825 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 91 selfloop transitions, 10 changer transitions 2/104 dead transitions. [2024-11-20 09:37:22,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 104 transitions, 735 flow [2024-11-20 09:37:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:37:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:37:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-20 09:37:22,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-11-20 09:37:22,827 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 443 flow. Second operand 4 states and 100 transitions. [2024-11-20 09:37:22,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 104 transitions, 735 flow [2024-11-20 09:37:22,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 709 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-20 09:37:22,858 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 421 flow [2024-11-20 09:37:22,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=421, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2024-11-20 09:37:22,859 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-11-20 09:37:22,860 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 421 flow [2024-11-20 09:37:22,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:22,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:22,860 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:22,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 09:37:22,861 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:22,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:22,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1650530228, now seen corresponding path program 5 times [2024-11-20 09:37:22,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:22,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790035919] [2024-11-20 09:37:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:22,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:22,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:22,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790035919] [2024-11-20 09:37:22,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790035919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:22,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:22,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:22,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735380918] [2024-11-20 09:37:22,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:22,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:22,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:22,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:22,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:22,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:22,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 421 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:22,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:22,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:22,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:23,533 INFO L124 PetriNetUnfolderBase]: 4526/6259 cut-off events. [2024-11-20 09:37:23,534 INFO L125 PetriNetUnfolderBase]: For 8040/8040 co-relation queries the response was YES. [2024-11-20 09:37:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16345 conditions, 6259 events. 4526/6259 cut-off events. For 8040/8040 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28018 event pairs, 2710 based on Foata normal form. 20/5281 useless extension candidates. Maximal degree in co-relation 16277. Up to 5489 conditions per place. [2024-11-20 09:37:23,567 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 84 selfloop transitions, 1 changer transitions 14/100 dead transitions. [2024-11-20 09:37:23,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 100 transitions, 693 flow [2024-11-20 09:37:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:37:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:37:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-11-20 09:37:23,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4744897959183674 [2024-11-20 09:37:23,569 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 421 flow. Second operand 4 states and 93 transitions. [2024-11-20 09:37:23,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 100 transitions, 693 flow [2024-11-20 09:37:23,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 100 transitions, 665 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-20 09:37:23,593 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 379 flow [2024-11-20 09:37:23,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=379, PETRI_PLACES=83, PETRI_TRANSITIONS=66} [2024-11-20 09:37:23,595 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-11-20 09:37:23,595 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 379 flow [2024-11-20 09:37:23,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:23,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:23,596 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:23,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 09:37:23,596 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:23,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:23,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1814186152, now seen corresponding path program 4 times [2024-11-20 09:37:23,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:23,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454118434] [2024-11-20 09:37:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:23,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:23,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:23,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454118434] [2024-11-20 09:37:23,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454118434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:23,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:23,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:23,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498267088] [2024-11-20 09:37:23,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:23,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:23,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:23,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:23,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:23,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 66 transitions, 379 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:23,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:23,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:24,251 INFO L124 PetriNetUnfolderBase]: 4155/5726 cut-off events. [2024-11-20 09:37:24,252 INFO L125 PetriNetUnfolderBase]: For 5951/5951 co-relation queries the response was YES. [2024-11-20 09:37:24,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14685 conditions, 5726 events. 4155/5726 cut-off events. For 5951/5951 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24769 event pairs, 884 based on Foata normal form. 40/4842 useless extension candidates. Maximal degree in co-relation 14668. Up to 5120 conditions per place. [2024-11-20 09:37:24,284 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 72 selfloop transitions, 5 changer transitions 16/94 dead transitions. [2024-11-20 09:37:24,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 94 transitions, 611 flow [2024-11-20 09:37:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:37:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:37:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-11-20 09:37:24,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-11-20 09:37:24,286 INFO L175 Difference]: Start difference. First operand has 83 places, 66 transitions, 379 flow. Second operand 4 states and 92 transitions. [2024-11-20 09:37:24,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 94 transitions, 611 flow [2024-11-20 09:37:24,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 94 transitions, 610 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:37:24,303 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 348 flow [2024-11-20 09:37:24,303 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2024-11-20 09:37:24,304 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-11-20 09:37:24,304 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 348 flow [2024-11-20 09:37:24,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:24,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:24,304 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:24,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 09:37:24,304 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:24,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash -70028716, now seen corresponding path program 5 times [2024-11-20 09:37:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:24,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775541476] [2024-11-20 09:37:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:24,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:24,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775541476] [2024-11-20 09:37:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775541476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:24,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:24,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152807697] [2024-11-20 09:37:24,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:24,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:37:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:37:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:37:24,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:24,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 348 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:24,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:24,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:24,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:24,753 INFO L124 PetriNetUnfolderBase]: 3657/5013 cut-off events. [2024-11-20 09:37:24,753 INFO L125 PetriNetUnfolderBase]: For 5007/5007 co-relation queries the response was YES. [2024-11-20 09:37:24,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12913 conditions, 5013 events. 3657/5013 cut-off events. For 5007/5007 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20960 event pairs, 2319 based on Foata normal form. 20/4213 useless extension candidates. Maximal degree in co-relation 12895. Up to 4857 conditions per place. [2024-11-20 09:37:24,775 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 59 selfloop transitions, 0 changer transitions 15/75 dead transitions. [2024-11-20 09:37:24,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 501 flow [2024-11-20 09:37:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:37:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:37:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-20 09:37:24,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37244897959183676 [2024-11-20 09:37:24,778 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 348 flow. Second operand 4 states and 73 transitions. [2024-11-20 09:37:24,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 501 flow [2024-11-20 09:37:24,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 75 transitions, 485 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-20 09:37:24,786 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 292 flow [2024-11-20 09:37:24,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=74, PETRI_TRANSITIONS=60} [2024-11-20 09:37:24,787 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-11-20 09:37:24,787 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 292 flow [2024-11-20 09:37:24,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-20 09:37:24,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:24,789 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:24,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 09:37:24,789 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:24,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:24,790 INFO L85 PathProgramCache]: Analyzing trace with hash 295309173, now seen corresponding path program 1 times [2024-11-20 09:37:24,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:24,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317326889] [2024-11-20 09:37:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:24,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:25,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:25,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317326889] [2024-11-20 09:37:25,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317326889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:25,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:25,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-20 09:37:25,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454075559] [2024-11-20 09:37:25,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:25,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 09:37:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 09:37:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-20 09:37:25,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:25,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 292 flow. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 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) [2024-11-20 09:37:25,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:25,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:25,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:26,062 INFO L124 PetriNetUnfolderBase]: 8965/12323 cut-off events. [2024-11-20 09:37:26,063 INFO L125 PetriNetUnfolderBase]: For 6511/6511 co-relation queries the response was YES. [2024-11-20 09:37:26,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31358 conditions, 12323 events. 8965/12323 cut-off events. For 6511/6511 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 60988 event pairs, 1972 based on Foata normal form. 1/10449 useless extension candidates. Maximal degree in co-relation 31344. Up to 3976 conditions per place. [2024-11-20 09:37:26,122 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 176 selfloop transitions, 16 changer transitions 1/194 dead transitions. [2024-11-20 09:37:26,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 194 transitions, 1254 flow [2024-11-20 09:37:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:37:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:37:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-11-20 09:37:26,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42630385487528344 [2024-11-20 09:37:26,124 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 292 flow. Second operand 9 states and 188 transitions. [2024-11-20 09:37:26,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 194 transitions, 1254 flow [2024-11-20 09:37:26,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 194 transitions, 1236 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-20 09:37:26,139 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 394 flow [2024-11-20 09:37:26,139 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2024-11-20 09:37:26,139 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-11-20 09:37:26,139 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 394 flow [2024-11-20 09:37:26,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 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) [2024-11-20 09:37:26,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:26,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:26,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 09:37:26,140 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:26,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash 501131277, now seen corresponding path program 1 times [2024-11-20 09:37:26,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:26,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167134429] [2024-11-20 09:37:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:26,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:26,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167134429] [2024-11-20 09:37:26,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167134429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:37:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219371160] [2024-11-20 09:37:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:26,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:37:26,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:37:26,302 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) [2024-11-20 09:37:26,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:37:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:26,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 09:37:26,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:37:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:27,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:37:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:37:28,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219371160] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:37:28,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:37:28,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 12] total 25 [2024-11-20 09:37:28,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347558580] [2024-11-20 09:37:28,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:28,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 09:37:28,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 09:37:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2024-11-20 09:37:28,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:28,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 394 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2024-11-20 09:37:28,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:28,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:28,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:32,435 INFO L124 PetriNetUnfolderBase]: 19969/27861 cut-off events. [2024-11-20 09:37:32,435 INFO L125 PetriNetUnfolderBase]: For 17263/17263 co-relation queries the response was YES. [2024-11-20 09:37:32,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77119 conditions, 27861 events. 19969/27861 cut-off events. For 17263/17263 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 161084 event pairs, 2126 based on Foata normal form. 1/25308 useless extension candidates. Maximal degree in co-relation 77101. Up to 7406 conditions per place. [2024-11-20 09:37:32,813 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 334 selfloop transitions, 83 changer transitions 9/427 dead transitions. [2024-11-20 09:37:32,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 427 transitions, 2839 flow [2024-11-20 09:37:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:37:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:37:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 339 transitions. [2024-11-20 09:37:32,815 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49416909620991256 [2024-11-20 09:37:32,815 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 394 flow. Second operand 14 states and 339 transitions. [2024-11-20 09:37:32,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 427 transitions, 2839 flow [2024-11-20 09:37:32,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 427 transitions, 2829 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-20 09:37:32,869 INFO L231 Difference]: Finished difference. Result has 102 places, 165 transitions, 1183 flow [2024-11-20 09:37:32,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1183, PETRI_PLACES=102, PETRI_TRANSITIONS=165} [2024-11-20 09:37:32,869 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-11-20 09:37:32,869 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 165 transitions, 1183 flow [2024-11-20 09:37:32,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2024-11-20 09:37:32,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:32,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:32,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:37:33,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:37:33,071 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:33,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:33,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1818739996, now seen corresponding path program 1 times [2024-11-20 09:37:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:33,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281037215] [2024-11-20 09:37:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:33,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:33,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:33,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281037215] [2024-11-20 09:37:33,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281037215] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:33,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:33,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:37:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925075606] [2024-11-20 09:37:33,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:33,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:37:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:33,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:37:33,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:37:33,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:33,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 165 transitions, 1183 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2024-11-20 09:37:33,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:33,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:33,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:36,287 INFO L124 PetriNetUnfolderBase]: 23229/32934 cut-off events. [2024-11-20 09:37:36,288 INFO L125 PetriNetUnfolderBase]: For 71407/71407 co-relation queries the response was YES. [2024-11-20 09:37:36,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117328 conditions, 32934 events. 23229/32934 cut-off events. For 71407/71407 co-relation queries the response was YES. Maximal size of possible extension queue 1255. Compared 200242 event pairs, 11344 based on Foata normal form. 0/30465 useless extension candidates. Maximal degree in co-relation 117299. Up to 13603 conditions per place. [2024-11-20 09:37:36,568 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 279 selfloop transitions, 26 changer transitions 6/312 dead transitions. [2024-11-20 09:37:36,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 312 transitions, 2792 flow [2024-11-20 09:37:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:37:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:37:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-20 09:37:36,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-11-20 09:37:36,570 INFO L175 Difference]: Start difference. First operand has 102 places, 165 transitions, 1183 flow. Second operand 6 states and 127 transitions. [2024-11-20 09:37:36,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 312 transitions, 2792 flow [2024-11-20 09:37:36,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 312 transitions, 2731 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-11-20 09:37:36,903 INFO L231 Difference]: Finished difference. Result has 106 places, 167 transitions, 1331 flow [2024-11-20 09:37:36,904 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1331, PETRI_PLACES=106, PETRI_TRANSITIONS=167} [2024-11-20 09:37:36,904 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-11-20 09:37:36,904 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 167 transitions, 1331 flow [2024-11-20 09:37:36,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2024-11-20 09:37:36,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:36,905 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:36,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 09:37:36,905 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:36,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1098878460, now seen corresponding path program 1 times [2024-11-20 09:37:36,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:36,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614553190] [2024-11-20 09:37:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:36,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:37,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:37,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614553190] [2024-11-20 09:37:37,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614553190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:37,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:37:37,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:37:37,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727188770] [2024-11-20 09:37:37,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:37,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:37:37,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:37,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:37:37,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:37:37,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:37,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 167 transitions, 1331 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2024-11-20 09:37:37,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:37,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:37,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:41,281 INFO L124 PetriNetUnfolderBase]: 33446/48223 cut-off events. [2024-11-20 09:37:41,282 INFO L125 PetriNetUnfolderBase]: For 133087/133087 co-relation queries the response was YES. [2024-11-20 09:37:41,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178336 conditions, 48223 events. 33446/48223 cut-off events. For 133087/133087 co-relation queries the response was YES. Maximal size of possible extension queue 1848. Compared 319928 event pairs, 18149 based on Foata normal form. 0/46157 useless extension candidates. Maximal degree in co-relation 178305. Up to 23711 conditions per place. [2024-11-20 09:37:41,999 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 288 selfloop transitions, 19 changer transitions 22/330 dead transitions. [2024-11-20 09:37:42,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 330 transitions, 3310 flow [2024-11-20 09:37:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:37:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:37:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-11-20 09:37:42,002 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-11-20 09:37:42,002 INFO L175 Difference]: Start difference. First operand has 106 places, 167 transitions, 1331 flow. Second operand 6 states and 122 transitions. [2024-11-20 09:37:42,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 330 transitions, 3310 flow [2024-11-20 09:37:42,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 330 transitions, 3297 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-20 09:37:42,656 INFO L231 Difference]: Finished difference. Result has 112 places, 155 transitions, 1307 flow [2024-11-20 09:37:42,656 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1307, PETRI_PLACES=112, PETRI_TRANSITIONS=155} [2024-11-20 09:37:42,657 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-11-20 09:37:42,657 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 155 transitions, 1307 flow [2024-11-20 09:37:42,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2024-11-20 09:37:42,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:42,657 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:42,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-20 09:37:42,658 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:42,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 59614561, now seen corresponding path program 2 times [2024-11-20 09:37:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:42,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838482628] [2024-11-20 09:37:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:42,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:42,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838482628] [2024-11-20 09:37:42,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838482628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:37:42,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145064454] [2024-11-20 09:37:42,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:37:42,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:37:42,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:37:42,872 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) [2024-11-20 09:37:42,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:37:42,971 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 09:37:42,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:37:42,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 09:37:42,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:37:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:37:43,590 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:37:43,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145064454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:43,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:37:43,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 17 [2024-11-20 09:37:43,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614034164] [2024-11-20 09:37:43,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:43,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:37:43,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:37:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:37:43,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:43,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 155 transitions, 1307 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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) [2024-11-20 09:37:43,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:43,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:43,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:48,980 INFO L124 PetriNetUnfolderBase]: 34630/49307 cut-off events. [2024-11-20 09:37:48,981 INFO L125 PetriNetUnfolderBase]: For 156184/156184 co-relation queries the response was YES. [2024-11-20 09:37:49,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190337 conditions, 49307 events. 34630/49307 cut-off events. For 156184/156184 co-relation queries the response was YES. Maximal size of possible extension queue 1867. Compared 322934 event pairs, 5023 based on Foata normal form. 1/47985 useless extension candidates. Maximal degree in co-relation 190303. Up to 24755 conditions per place. [2024-11-20 09:37:49,468 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 323 selfloop transitions, 121 changer transitions 5/450 dead transitions. [2024-11-20 09:37:49,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 450 transitions, 4340 flow [2024-11-20 09:37:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:37:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:37:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 281 transitions. [2024-11-20 09:37:49,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4096209912536443 [2024-11-20 09:37:49,471 INFO L175 Difference]: Start difference. First operand has 112 places, 155 transitions, 1307 flow. Second operand 14 states and 281 transitions. [2024-11-20 09:37:49,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 450 transitions, 4340 flow [2024-11-20 09:37:51,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 450 transitions, 4210 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-11-20 09:37:51,378 INFO L231 Difference]: Finished difference. Result has 127 places, 226 transitions, 2256 flow [2024-11-20 09:37:51,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2256, PETRI_PLACES=127, PETRI_TRANSITIONS=226} [2024-11-20 09:37:51,379 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-11-20 09:37:51,379 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 226 transitions, 2256 flow [2024-11-20 09:37:51,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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) [2024-11-20 09:37:51,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:37:51,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:37:51,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 09:37:51,579 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,SelfDestructingSolverStorable21 [2024-11-20 09:37:51,580 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:37:51,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:37:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash -500687249, now seen corresponding path program 3 times [2024-11-20 09:37:51,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:37:51,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457990498] [2024-11-20 09:37:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:37:51,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:37:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:37:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:37:51,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:37:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457990498] [2024-11-20 09:37:51,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457990498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:37:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286931513] [2024-11-20 09:37:51,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:37:51,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:37:51,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:37:51,765 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) [2024-11-20 09:37:51,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:37:51,858 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-20 09:37:51,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:37:51,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 09:37:51,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:37:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:37:52,303 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:37:52,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286931513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:37:52,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:37:52,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 17 [2024-11-20 09:37:52,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24862731] [2024-11-20 09:37:52,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:37:52,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:37:52,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:37:52,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:37:52,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:37:52,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:37:52,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 226 transitions, 2256 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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) [2024-11-20 09:37:52,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:37:52,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:37:52,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:37:58,121 INFO L124 PetriNetUnfolderBase]: 35856/51014 cut-off events. [2024-11-20 09:37:58,121 INFO L125 PetriNetUnfolderBase]: For 183961/183961 co-relation queries the response was YES. [2024-11-20 09:37:58,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210368 conditions, 51014 events. 35856/51014 cut-off events. For 183961/183961 co-relation queries the response was YES. Maximal size of possible extension queue 1952. Compared 335434 event pairs, 4858 based on Foata normal form. 1/49639 useless extension candidates. Maximal degree in co-relation 210329. Up to 25148 conditions per place. [2024-11-20 09:37:58,703 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 338 selfloop transitions, 156 changer transitions 14/509 dead transitions. [2024-11-20 09:37:58,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 509 transitions, 5388 flow [2024-11-20 09:37:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 09:37:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 09:37:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 327 transitions. [2024-11-20 09:37:58,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39255702280912363 [2024-11-20 09:37:58,705 INFO L175 Difference]: Start difference. First operand has 127 places, 226 transitions, 2256 flow. Second operand 17 states and 327 transitions. [2024-11-20 09:37:58,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 509 transitions, 5388 flow [2024-11-20 09:38:00,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 509 transitions, 5292 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-11-20 09:38:00,689 INFO L231 Difference]: Finished difference. Result has 147 places, 270 transitions, 3087 flow [2024-11-20 09:38:00,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3087, PETRI_PLACES=147, PETRI_TRANSITIONS=270} [2024-11-20 09:38:00,690 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-11-20 09:38:00,690 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 270 transitions, 3087 flow [2024-11-20 09:38:00,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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) [2024-11-20 09:38:00,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:38:00,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:38:00,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 09:38:00,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:38:00,891 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:38:00,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:38:00,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1742562783, now seen corresponding path program 4 times [2024-11-20 09:38:00,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:38:00,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264409673] [2024-11-20 09:38:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:38:00,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:38:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:38:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:38:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:38:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264409673] [2024-11-20 09:38:01,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264409673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:38:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454638328] [2024-11-20 09:38:01,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:38:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:38:01,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:38:01,224 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) [2024-11-20 09:38:01,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:38:01,311 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:38:01,311 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:38:01,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:38:01,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:38:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:38:01,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:38:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:38:02,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454638328] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:38:02,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:38:02,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 11] total 25 [2024-11-20 09:38:02,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451480123] [2024-11-20 09:38:02,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:38:02,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 09:38:02,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:38:02,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 09:38:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2024-11-20 09:38:02,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:38:02,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 270 transitions, 3087 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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) [2024-11-20 09:38:02,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:38:02,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:38:02,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:38:09,130 INFO L124 PetriNetUnfolderBase]: 37265/52964 cut-off events. [2024-11-20 09:38:09,130 INFO L125 PetriNetUnfolderBase]: For 227781/227781 co-relation queries the response was YES. [2024-11-20 09:38:09,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228506 conditions, 52964 events. 37265/52964 cut-off events. For 227781/227781 co-relation queries the response was YES. Maximal size of possible extension queue 2008. Compared 348682 event pairs, 3699 based on Foata normal form. 4/51592 useless extension candidates. Maximal degree in co-relation 228459. Up to 12134 conditions per place. [2024-11-20 09:38:09,888 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 485 selfloop transitions, 173 changer transitions 12/671 dead transitions. [2024-11-20 09:38:09,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 671 transitions, 7996 flow [2024-11-20 09:38:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:38:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:38:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 344 transitions. [2024-11-20 09:38:09,890 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46802721088435373 [2024-11-20 09:38:09,890 INFO L175 Difference]: Start difference. First operand has 147 places, 270 transitions, 3087 flow. Second operand 15 states and 344 transitions. [2024-11-20 09:38:09,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 671 transitions, 7996 flow [2024-11-20 09:38:12,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 671 transitions, 7637 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-11-20 09:38:12,769 INFO L231 Difference]: Finished difference. Result has 160 places, 315 transitions, 3830 flow [2024-11-20 09:38:12,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3830, PETRI_PLACES=160, PETRI_TRANSITIONS=315} [2024-11-20 09:38:12,770 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-11-20 09:38:12,770 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 315 transitions, 3830 flow [2024-11-20 09:38:12,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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) [2024-11-20 09:38:12,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:38:12,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:38:12,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 09:38:12,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:38:12,974 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:38:12,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:38:12,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1363015643, now seen corresponding path program 5 times [2024-11-20 09:38:12,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:38:12,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897184354] [2024-11-20 09:38:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:38:12,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:38:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:38:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:38:13,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:38:13,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897184354] [2024-11-20 09:38:13,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897184354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:38:13,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126450250] [2024-11-20 09:38:13,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:38:13,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:38:13,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:38:13,140 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) [2024-11-20 09:38:13,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:38:13,232 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:38:13,233 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:38:13,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 09:38:13,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:38:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:38:13,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:38:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:38:14,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126450250] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:38:14,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:38:14,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 12] total 25 [2024-11-20 09:38:14,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956939338] [2024-11-20 09:38:14,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:38:14,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 09:38:14,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:38:14,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 09:38:14,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2024-11-20 09:38:14,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2024-11-20 09:38:14,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 315 transitions, 3830 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2024-11-20 09:38:14,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:38:14,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2024-11-20 09:38:14,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand