./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/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:28:24,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:28:24,347 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:28:24,352 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:28:24,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:28:24,384 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:28:24,385 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:28:24,385 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:28:24,386 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:28:24,387 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:28:24,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:28:24,388 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:28:24,389 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:28:24,391 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:28:24,391 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:28:24,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:28:24,391 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:28:24,392 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:28:24,392 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:28:24,392 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:28:24,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:28:24,393 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:28:24,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:28:24,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:28:24,396 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:28:24,396 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:28:24,396 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:28:24,396 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:28:24,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:28:24,397 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:28:24,397 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:28:24,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:28:24,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:28:24,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:28:24,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:28:24,398 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:28:24,398 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:28:24,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:28:24,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:28:24,399 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:28:24,399 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:28:24,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:28:24,401 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2024-10-11 14:28:24,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:28:24,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:28:24,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:28:24,686 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:28:24,689 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:28:24,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2024-10-11 14:28:26,142 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:28:26,338 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:28:26,338 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2024-10-11 14:28:26,345 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/80d7ba8d5/13e09936b33845698cf719a38f289f83/FLAGa5456c764 [2024-10-11 14:28:26,359 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/80d7ba8d5/13e09936b33845698cf719a38f289f83 [2024-10-11 14:28:26,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:28:26,363 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:28:26,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:28:26,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:28:26,370 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:28:26,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20294573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26, skipping insertion in model container [2024-10-11 14:28:26,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,400 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:28:26,604 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2024-10-11 14:28:26,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:28:26,641 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:28:26,661 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2024-10-11 14:28:26,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:28:26,681 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:28:26,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26 WrapperNode [2024-10-11 14:28:26,681 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:28:26,682 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:28:26,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:28:26,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:28:26,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,696 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,713 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2024-10-11 14:28:26,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:28:26,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:28:26,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:28:26,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:28:26,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,728 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,742 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 14:28:26,743 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,743 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,747 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,755 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,756 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,758 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:28:26,759 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:28:26,759 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:28:26,760 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:28:26,760 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (1/1) ... [2024-10-11 14:28:26,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:28:26,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:26,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:28:26,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:28:26,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:28:26,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:28:26,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:28:26,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:28:26,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:28:26,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:28:26,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:28:26,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:28:26,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:28:26,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:28:26,859 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:28:26,981 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:28:26,982 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:28:27,177 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:28:27,178 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:28:27,304 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:28:27,308 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:28:27,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:27 BoogieIcfgContainer [2024-10-11 14:28:27,309 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:28:27,312 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:28:27,312 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:28:27,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:28:27,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:28:26" (1/3) ... [2024-10-11 14:28:27,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43df9bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:27, skipping insertion in model container [2024-10-11 14:28:27,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:26" (2/3) ... [2024-10-11 14:28:27,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43df9bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:27, skipping insertion in model container [2024-10-11 14:28:27,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:27" (3/3) ... [2024-10-11 14:28:27,322 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2024-10-11 14:28:27,338 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:28:27,338 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:28:27,338 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:28:27,388 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 14:28:27,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2024-10-11 14:28:27,447 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-10-11 14:28:27,447 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:28:27,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 22 events. 3/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-10-11 14:28:27,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 71 flow [2024-10-11 14:28:27,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 60 flow [2024-10-11 14:28:27,467 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:28:27,474 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;@3ac707af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:28:27,474 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:28:27,484 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:28:27,485 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-10-11 14:28:27,485 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:28:27,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:27,487 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:27,487 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)] === [2024-10-11 14:28:27,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash 329837544, now seen corresponding path program 1 times [2024-10-11 14:28:27,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:27,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363884742] [2024-10-11 14:28:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:27,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:28,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:28,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363884742] [2024-10-11 14:28:28,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363884742] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:28,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:28,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:28:28,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528722318] [2024-10-11 14:28:28,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:28,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:28:28,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:28,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:28:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:28:28,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:28,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:28,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:28,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:28,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:28,419 INFO L124 PetriNetUnfolderBase]: 386/565 cut-off events. [2024-10-11 14:28:28,420 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-10-11 14:28:28,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 565 events. 386/565 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1779 event pairs, 124 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-10-11 14:28:28,429 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 32 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2024-10-11 14:28:28,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 183 flow [2024-10-11 14:28:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:28:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:28:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-10-11 14:28:28,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-11 14:28:28,442 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 60 flow. Second operand 3 states and 50 transitions. [2024-10-11 14:28:28,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 183 flow [2024-10-11 14:28:28,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 14:28:28,448 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 74 flow [2024-10-11 14:28:28,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-10-11 14:28:28,455 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-10-11 14:28:28,455 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 74 flow [2024-10-11 14:28:28,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:28,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:28,456 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:28,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:28:28,456 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)] === [2024-10-11 14:28:28,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1373076166, now seen corresponding path program 1 times [2024-10-11 14:28:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:28,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080156514] [2024-10-11 14:28:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:28,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:28,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080156514] [2024-10-11 14:28:28,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080156514] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:28,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:28,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:28,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600489702] [2024-10-11 14:28:28,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:28,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:28,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:28,787 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:28,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:28,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:28,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:28,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:29,122 INFO L124 PetriNetUnfolderBase]: 544/771 cut-off events. [2024-10-11 14:28:29,123 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-10-11 14:28:29,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 771 events. 544/771 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2516 event pairs, 203 based on Foata normal form. 2/773 useless extension candidates. Maximal degree in co-relation 545. Up to 554 conditions per place. [2024-10-11 14:28:29,132 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 47 selfloop transitions, 18 changer transitions 3/69 dead transitions. [2024-10-11 14:28:29,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 69 transitions, 347 flow [2024-10-11 14:28:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:28:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:28:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-10-11 14:28:29,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-10-11 14:28:29,136 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 74 flow. Second operand 7 states and 87 transitions. [2024-10-11 14:28:29,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 69 transitions, 347 flow [2024-10-11 14:28:29,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 69 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:28:29,140 INFO L231 Difference]: Finished difference. Result has 34 places, 40 transitions, 198 flow [2024-10-11 14:28:29,140 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=34, PETRI_TRANSITIONS=40} [2024-10-11 14:28:29,141 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-10-11 14:28:29,142 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 40 transitions, 198 flow [2024-10-11 14:28:29,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:29,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:29,143 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:29,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:28:29,143 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)] === [2024-10-11 14:28:29,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:29,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1366783543, now seen corresponding path program 1 times [2024-10-11 14:28:29,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:29,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792167446] [2024-10-11 14:28:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:29,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:29,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792167446] [2024-10-11 14:28:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792167446] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358812513] [2024-10-11 14:28:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:29,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:29,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:29,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:29,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:28:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:29,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:28:29,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:29,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:30,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358812513] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:30,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:30,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-10-11 14:28:30,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343290765] [2024-10-11 14:28:30,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:30,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:28:30,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:28:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:28:30,403 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:30,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 40 transitions, 198 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:30,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:30,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:30,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:31,702 INFO L124 PetriNetUnfolderBase]: 1135/1672 cut-off events. [2024-10-11 14:28:31,702 INFO L125 PetriNetUnfolderBase]: For 1348/1348 co-relation queries the response was YES. [2024-10-11 14:28:31,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5285 conditions, 1672 events. 1135/1672 cut-off events. For 1348/1348 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7015 event pairs, 142 based on Foata normal form. 24/1696 useless extension candidates. Maximal degree in co-relation 3157. Up to 542 conditions per place. [2024-10-11 14:28:31,717 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 170 selfloop transitions, 60 changer transitions 0/231 dead transitions. [2024-10-11 14:28:31,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 231 transitions, 1367 flow [2024-10-11 14:28:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:28:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:28:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 300 transitions. [2024-10-11 14:28:31,720 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-11 14:28:31,720 INFO L175 Difference]: Start difference. First operand has 34 places, 40 transitions, 198 flow. Second operand 22 states and 300 transitions. [2024-10-11 14:28:31,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 231 transitions, 1367 flow [2024-10-11 14:28:31,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 231 transitions, 1345 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-10-11 14:28:31,736 INFO L231 Difference]: Finished difference. Result has 71 places, 94 transitions, 718 flow [2024-10-11 14:28:31,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=718, PETRI_PLACES=71, PETRI_TRANSITIONS=94} [2024-10-11 14:28:31,738 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2024-10-11 14:28:31,738 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 94 transitions, 718 flow [2024-10-11 14:28:31,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:31,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:31,738 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:31,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:28:31,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:31,940 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)] === [2024-10-11 14:28:31,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1901869040, now seen corresponding path program 2 times [2024-10-11 14:28:31,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:31,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921843737] [2024-10-11 14:28:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:31,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:32,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:32,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921843737] [2024-10-11 14:28:32,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921843737] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:32,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:32,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:32,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267138926] [2024-10-11 14:28:32,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:32,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:32,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:32,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:32,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:32,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 718 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:32,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:32,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:32,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:32,631 INFO L124 PetriNetUnfolderBase]: 1536/2293 cut-off events. [2024-10-11 14:28:32,631 INFO L125 PetriNetUnfolderBase]: For 21136/21136 co-relation queries the response was YES. [2024-10-11 14:28:32,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12756 conditions, 2293 events. 1536/2293 cut-off events. For 21136/21136 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10310 event pairs, 475 based on Foata normal form. 8/2301 useless extension candidates. Maximal degree in co-relation 9708. Up to 1296 conditions per place. [2024-10-11 14:28:32,656 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 150 selfloop transitions, 30 changer transitions 4/185 dead transitions. [2024-10-11 14:28:32,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 185 transitions, 1736 flow [2024-10-11 14:28:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:28:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:28:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-10-11 14:28:32,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-10-11 14:28:32,658 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 718 flow. Second operand 7 states and 92 transitions. [2024-10-11 14:28:32,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 185 transitions, 1736 flow [2024-10-11 14:28:32,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 185 transitions, 1600 flow, removed 68 selfloop flow, removed 0 redundant places. [2024-10-11 14:28:32,723 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 861 flow [2024-10-11 14:28:32,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=861, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2024-10-11 14:28:32,724 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-10-11 14:28:32,725 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 861 flow [2024-10-11 14:28:32,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:32,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:32,725 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:32,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:28:32,725 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)] === [2024-10-11 14:28:32,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1898738297, now seen corresponding path program 2 times [2024-10-11 14:28:32,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:32,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860107787] [2024-10-11 14:28:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:32,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:32,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:32,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860107787] [2024-10-11 14:28:32,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860107787] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:32,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274511531] [2024-10-11 14:28:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:32,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:32,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:32,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:32,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:28:33,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:33,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:33,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:28:33,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:33,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:33,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274511531] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:33,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:28:33,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2024-10-11 14:28:33,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571377783] [2024-10-11 14:28:33,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:33,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:28:33,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:28:33,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:28:33,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:33,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 861 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:33,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:33,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:33,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:34,094 INFO L124 PetriNetUnfolderBase]: 1750/2634 cut-off events. [2024-10-11 14:28:34,095 INFO L125 PetriNetUnfolderBase]: For 28640/28640 co-relation queries the response was YES. [2024-10-11 14:28:34,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15869 conditions, 2634 events. 1750/2634 cut-off events. For 28640/28640 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12058 event pairs, 390 based on Foata normal form. 14/2648 useless extension candidates. Maximal degree in co-relation 12512. Up to 810 conditions per place. [2024-10-11 14:28:34,131 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 141 selfloop transitions, 51 changer transitions 0/193 dead transitions. [2024-10-11 14:28:34,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 193 transitions, 1992 flow [2024-10-11 14:28:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:28:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:28:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-10-11 14:28:34,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-10-11 14:28:34,133 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 861 flow. Second operand 8 states and 119 transitions. [2024-10-11 14:28:34,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 193 transitions, 1992 flow [2024-10-11 14:28:34,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 193 transitions, 1848 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:34,240 INFO L231 Difference]: Finished difference. Result has 91 places, 125 transitions, 1154 flow [2024-10-11 14:28:34,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1154, PETRI_PLACES=91, PETRI_TRANSITIONS=125} [2024-10-11 14:28:34,243 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2024-10-11 14:28:34,244 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 125 transitions, 1154 flow [2024-10-11 14:28:34,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:34,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:34,244 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:34,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:28:34,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:34,445 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)] === [2024-10-11 14:28:34,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 864832696, now seen corresponding path program 1 times [2024-10-11 14:28:34,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:34,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057026039] [2024-10-11 14:28:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:34,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:34,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057026039] [2024-10-11 14:28:34,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057026039] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:34,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:34,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:34,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768455313] [2024-10-11 14:28:34,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:34,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:34,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:34,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:34,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:34,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 125 transitions, 1154 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:34,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:34,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:34,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:35,217 INFO L124 PetriNetUnfolderBase]: 1808/2716 cut-off events. [2024-10-11 14:28:35,218 INFO L125 PetriNetUnfolderBase]: For 27896/27896 co-relation queries the response was YES. [2024-10-11 14:28:35,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15936 conditions, 2716 events. 1808/2716 cut-off events. For 27896/27896 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12618 event pairs, 771 based on Foata normal form. 4/2720 useless extension candidates. Maximal degree in co-relation 15352. Up to 2231 conditions per place. [2024-10-11 14:28:35,255 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 142 selfloop transitions, 37 changer transitions 5/185 dead transitions. [2024-10-11 14:28:35,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 185 transitions, 2093 flow [2024-10-11 14:28:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:28:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:28:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-10-11 14:28:35,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-10-11 14:28:35,257 INFO L175 Difference]: Start difference. First operand has 91 places, 125 transitions, 1154 flow. Second operand 7 states and 90 transitions. [2024-10-11 14:28:35,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 185 transitions, 2093 flow [2024-10-11 14:28:35,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 185 transitions, 2087 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-11 14:28:35,316 INFO L231 Difference]: Finished difference. Result has 102 places, 141 transitions, 1515 flow [2024-10-11 14:28:35,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=102, PETRI_TRANSITIONS=141} [2024-10-11 14:28:35,318 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 74 predicate places. [2024-10-11 14:28:35,319 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 141 transitions, 1515 flow [2024-10-11 14:28:35,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:35,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:35,319 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:35,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:28:35,320 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)] === [2024-10-11 14:28:35,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2041957270, now seen corresponding path program 2 times [2024-10-11 14:28:35,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:35,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285038480] [2024-10-11 14:28:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:35,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:35,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:35,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285038480] [2024-10-11 14:28:35,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285038480] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:35,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:35,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234416447] [2024-10-11 14:28:35,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:35,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:35,488 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:35,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 141 transitions, 1515 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:35,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:35,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:35,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:36,045 INFO L124 PetriNetUnfolderBase]: 2003/2970 cut-off events. [2024-10-11 14:28:36,046 INFO L125 PetriNetUnfolderBase]: For 42009/42009 co-relation queries the response was YES. [2024-10-11 14:28:36,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19496 conditions, 2970 events. 2003/2970 cut-off events. For 42009/42009 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13732 event pairs, 686 based on Foata normal form. 4/2974 useless extension candidates. Maximal degree in co-relation 18635. Up to 2266 conditions per place. [2024-10-11 14:28:36,082 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 158 selfloop transitions, 87 changer transitions 5/251 dead transitions. [2024-10-11 14:28:36,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 251 transitions, 3314 flow [2024-10-11 14:28:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:28:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:28:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-10-11 14:28:36,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-10-11 14:28:36,084 INFO L175 Difference]: Start difference. First operand has 102 places, 141 transitions, 1515 flow. Second operand 7 states and 86 transitions. [2024-10-11 14:28:36,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 251 transitions, 3314 flow [2024-10-11 14:28:36,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 251 transitions, 3018 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-10-11 14:28:36,176 INFO L231 Difference]: Finished difference. Result has 108 places, 181 transitions, 2199 flow [2024-10-11 14:28:36,177 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2199, PETRI_PLACES=108, PETRI_TRANSITIONS=181} [2024-10-11 14:28:36,177 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 80 predicate places. [2024-10-11 14:28:36,178 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 181 transitions, 2199 flow [2024-10-11 14:28:36,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:36,178 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:36,178 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:36,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:28:36,178 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)] === [2024-10-11 14:28:36,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:36,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1873234894, now seen corresponding path program 3 times [2024-10-11 14:28:36,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:36,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236924093] [2024-10-11 14:28:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:36,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:36,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:36,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236924093] [2024-10-11 14:28:36,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236924093] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:36,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843451099] [2024-10-11 14:28:36,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:28:36,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:36,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:36,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:36,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:28:36,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:28:36,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:36,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:28:36,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:36,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:36,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843451099] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:36,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:28:36,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 16 [2024-10-11 14:28:36,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607740223] [2024-10-11 14:28:36,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:36,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:36,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:36,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:28:36,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:36,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 181 transitions, 2199 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:36,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:36,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:36,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:37,236 INFO L124 PetriNetUnfolderBase]: 2252/3296 cut-off events. [2024-10-11 14:28:37,236 INFO L125 PetriNetUnfolderBase]: For 50984/50984 co-relation queries the response was YES. [2024-10-11 14:28:37,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23082 conditions, 3296 events. 2252/3296 cut-off events. For 50984/50984 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15201 event pairs, 615 based on Foata normal form. 13/3309 useless extension candidates. Maximal degree in co-relation 22489. Up to 1518 conditions per place. [2024-10-11 14:28:37,279 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 209 selfloop transitions, 41 changer transitions 1/252 dead transitions. [2024-10-11 14:28:37,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 252 transitions, 3554 flow [2024-10-11 14:28:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:28:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:28:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-10-11 14:28:37,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-10-11 14:28:37,281 INFO L175 Difference]: Start difference. First operand has 108 places, 181 transitions, 2199 flow. Second operand 6 states and 86 transitions. [2024-10-11 14:28:37,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 252 transitions, 3554 flow [2024-10-11 14:28:37,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 252 transitions, 3230 flow, removed 162 selfloop flow, removed 0 redundant places. [2024-10-11 14:28:37,403 INFO L231 Difference]: Finished difference. Result has 116 places, 199 transitions, 2495 flow [2024-10-11 14:28:37,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2495, PETRI_PLACES=116, PETRI_TRANSITIONS=199} [2024-10-11 14:28:37,404 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 88 predicate places. [2024-10-11 14:28:37,404 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 199 transitions, 2495 flow [2024-10-11 14:28:37,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:37,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:37,404 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:37,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:28:37,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:37,609 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)] === [2024-10-11 14:28:37,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:37,610 INFO L85 PathProgramCache]: Analyzing trace with hash -341399118, now seen corresponding path program 4 times [2024-10-11 14:28:37,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:37,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732252885] [2024-10-11 14:28:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:37,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:37,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:37,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732252885] [2024-10-11 14:28:37,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732252885] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:37,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:37,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:37,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850782888] [2024-10-11 14:28:37,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:37,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:37,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:37,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:37,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 199 transitions, 2495 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:37,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:37,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:37,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:38,316 INFO L124 PetriNetUnfolderBase]: 2260/3308 cut-off events. [2024-10-11 14:28:38,316 INFO L125 PetriNetUnfolderBase]: For 51127/51127 co-relation queries the response was YES. [2024-10-11 14:28:38,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22751 conditions, 3308 events. 2260/3308 cut-off events. For 51127/51127 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15253 event pairs, 696 based on Foata normal form. 2/3310 useless extension candidates. Maximal degree in co-relation 22157. Up to 2474 conditions per place. [2024-10-11 14:28:38,401 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 168 selfloop transitions, 100 changer transitions 3/272 dead transitions. [2024-10-11 14:28:38,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 272 transitions, 3855 flow [2024-10-11 14:28:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:28:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:28:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-10-11 14:28:38,402 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-10-11 14:28:38,402 INFO L175 Difference]: Start difference. First operand has 116 places, 199 transitions, 2495 flow. Second operand 7 states and 85 transitions. [2024-10-11 14:28:38,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 272 transitions, 3855 flow [2024-10-11 14:28:38,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 272 transitions, 3719 flow, removed 59 selfloop flow, removed 1 redundant places. [2024-10-11 14:28:38,594 INFO L231 Difference]: Finished difference. Result has 125 places, 230 transitions, 3169 flow [2024-10-11 14:28:38,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3169, PETRI_PLACES=125, PETRI_TRANSITIONS=230} [2024-10-11 14:28:38,595 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 97 predicate places. [2024-10-11 14:28:38,596 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 230 transitions, 3169 flow [2024-10-11 14:28:38,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:38,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:38,596 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:38,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:28:38,596 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)] === [2024-10-11 14:28:38,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1569627070, now seen corresponding path program 5 times [2024-10-11 14:28:38,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:38,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917731074] [2024-10-11 14:28:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:38,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:38,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917731074] [2024-10-11 14:28:38,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917731074] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:38,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:38,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:38,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864454746] [2024-10-11 14:28:38,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:38,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:38,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:38,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:38,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:38,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:38,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 230 transitions, 3169 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:38,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:38,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:38,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:39,501 INFO L124 PetriNetUnfolderBase]: 2351/3476 cut-off events. [2024-10-11 14:28:39,501 INFO L125 PetriNetUnfolderBase]: For 55075/55075 co-relation queries the response was YES. [2024-10-11 14:28:39,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24881 conditions, 3476 events. 2351/3476 cut-off events. For 55075/55075 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16572 event pairs, 476 based on Foata normal form. 10/3486 useless extension candidates. Maximal degree in co-relation 24283. Up to 1870 conditions per place. [2024-10-11 14:28:39,542 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 230 selfloop transitions, 105 changer transitions 12/348 dead transitions. [2024-10-11 14:28:39,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 348 transitions, 5331 flow [2024-10-11 14:28:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:28:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:28:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-10-11 14:28:39,543 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-10-11 14:28:39,543 INFO L175 Difference]: Start difference. First operand has 125 places, 230 transitions, 3169 flow. Second operand 7 states and 88 transitions. [2024-10-11 14:28:39,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 348 transitions, 5331 flow [2024-10-11 14:28:39,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 348 transitions, 5119 flow, removed 106 selfloop flow, removed 1 redundant places. [2024-10-11 14:28:39,740 INFO L231 Difference]: Finished difference. Result has 133 places, 247 transitions, 3625 flow [2024-10-11 14:28:39,740 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3625, PETRI_PLACES=133, PETRI_TRANSITIONS=247} [2024-10-11 14:28:39,741 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 105 predicate places. [2024-10-11 14:28:39,741 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 247 transitions, 3625 flow [2024-10-11 14:28:39,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:39,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:39,741 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:39,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 14:28:39,741 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)] === [2024-10-11 14:28:39,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:39,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2054293548, now seen corresponding path program 6 times [2024-10-11 14:28:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:39,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332812696] [2024-10-11 14:28:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:39,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:39,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:39,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332812696] [2024-10-11 14:28:39,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332812696] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:39,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18341791] [2024-10-11 14:28:39,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:28:39,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:39,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:39,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:39,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:28:39,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:28:39,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:39,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:28:39,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:40,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18341791] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:40,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:40,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-10-11 14:28:40,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018816976] [2024-10-11 14:28:40,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:40,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:28:40,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:40,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:28:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:28:40,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:40,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 247 transitions, 3625 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:40,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:40,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:40,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:41,816 INFO L124 PetriNetUnfolderBase]: 3289/4959 cut-off events. [2024-10-11 14:28:41,817 INFO L125 PetriNetUnfolderBase]: For 73857/73857 co-relation queries the response was YES. [2024-10-11 14:28:41,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34340 conditions, 4959 events. 3289/4959 cut-off events. For 73857/73857 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26019 event pairs, 424 based on Foata normal form. 26/4985 useless extension candidates. Maximal degree in co-relation 33176. Up to 1673 conditions per place. [2024-10-11 14:28:41,941 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 286 selfloop transitions, 238 changer transitions 1/526 dead transitions. [2024-10-11 14:28:41,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 526 transitions, 7438 flow [2024-10-11 14:28:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:28:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:28:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 289 transitions. [2024-10-11 14:28:41,945 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5254545454545455 [2024-10-11 14:28:41,945 INFO L175 Difference]: Start difference. First operand has 133 places, 247 transitions, 3625 flow. Second operand 22 states and 289 transitions. [2024-10-11 14:28:41,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 526 transitions, 7438 flow [2024-10-11 14:28:42,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 526 transitions, 7030 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-10-11 14:28:42,224 INFO L231 Difference]: Finished difference. Result has 166 places, 330 transitions, 5339 flow [2024-10-11 14:28:42,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5339, PETRI_PLACES=166, PETRI_TRANSITIONS=330} [2024-10-11 14:28:42,224 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 138 predicate places. [2024-10-11 14:28:42,225 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 330 transitions, 5339 flow [2024-10-11 14:28:42,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:42,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:42,225 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:42,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:28:42,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 14:28:42,426 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)] === [2024-10-11 14:28:42,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:42,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1556488846, now seen corresponding path program 7 times [2024-10-11 14:28:42,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:42,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029221620] [2024-10-11 14:28:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:42,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:42,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:42,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029221620] [2024-10-11 14:28:42,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029221620] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:42,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693102123] [2024-10-11 14:28:42,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:28:42,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:42,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:42,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:42,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:28:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:42,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 14:28:42,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:42,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:42,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693102123] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:42,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:28:42,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 9 [2024-10-11 14:28:42,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610786051] [2024-10-11 14:28:42,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:42,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:28:42,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:42,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:28:42,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:28:42,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:42,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 330 transitions, 5339 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:42,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:42,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:42,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:43,993 INFO L124 PetriNetUnfolderBase]: 3785/5669 cut-off events. [2024-10-11 14:28:43,994 INFO L125 PetriNetUnfolderBase]: For 102375/102375 co-relation queries the response was YES. [2024-10-11 14:28:44,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43496 conditions, 5669 events. 3785/5669 cut-off events. For 102375/102375 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 30090 event pairs, 518 based on Foata normal form. 13/5682 useless extension candidates. Maximal degree in co-relation 43003. Up to 1939 conditions per place. [2024-10-11 14:28:44,053 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 350 selfloop transitions, 136 changer transitions 2/489 dead transitions. [2024-10-11 14:28:44,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 489 transitions, 8536 flow [2024-10-11 14:28:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:28:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:28:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-10-11 14:28:44,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-10-11 14:28:44,055 INFO L175 Difference]: Start difference. First operand has 166 places, 330 transitions, 5339 flow. Second operand 8 states and 124 transitions. [2024-10-11 14:28:44,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 489 transitions, 8536 flow [2024-10-11 14:28:44,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 489 transitions, 8183 flow, removed 131 selfloop flow, removed 1 redundant places. [2024-10-11 14:28:44,557 INFO L231 Difference]: Finished difference. Result has 177 places, 385 transitions, 6604 flow [2024-10-11 14:28:44,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5094, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6604, PETRI_PLACES=177, PETRI_TRANSITIONS=385} [2024-10-11 14:28:44,558 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 149 predicate places. [2024-10-11 14:28:44,558 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 385 transitions, 6604 flow [2024-10-11 14:28:44,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:44,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:44,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:44,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:44,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 14:28:44,759 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)] === [2024-10-11 14:28:44,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:44,759 INFO L85 PathProgramCache]: Analyzing trace with hash 330952359, now seen corresponding path program 3 times [2024-10-11 14:28:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:44,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209240236] [2024-10-11 14:28:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:44,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:44,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:44,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209240236] [2024-10-11 14:28:44,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209240236] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:44,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:44,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:44,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075421992] [2024-10-11 14:28:44,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:44,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:44,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:44,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:44,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:44,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:44,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 385 transitions, 6604 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:44,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:44,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:44,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:45,993 INFO L124 PetriNetUnfolderBase]: 3787/5674 cut-off events. [2024-10-11 14:28:45,993 INFO L125 PetriNetUnfolderBase]: For 110005/110005 co-relation queries the response was YES. [2024-10-11 14:28:46,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43866 conditions, 5674 events. 3787/5674 cut-off events. For 110005/110005 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30249 event pairs, 1176 based on Foata normal form. 3/5677 useless extension candidates. Maximal degree in co-relation 43349. Up to 3754 conditions per place. [2024-10-11 14:28:46,063 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 379 selfloop transitions, 61 changer transitions 9/450 dead transitions. [2024-10-11 14:28:46,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 450 transitions, 8267 flow [2024-10-11 14:28:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:28:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:28:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-10-11 14:28:46,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-10-11 14:28:46,065 INFO L175 Difference]: Start difference. First operand has 177 places, 385 transitions, 6604 flow. Second operand 7 states and 95 transitions. [2024-10-11 14:28:46,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 450 transitions, 8267 flow [2024-10-11 14:28:46,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 450 transitions, 8149 flow, removed 59 selfloop flow, removed 0 redundant places. [2024-10-11 14:28:46,616 INFO L231 Difference]: Finished difference. Result has 185 places, 386 transitions, 6668 flow [2024-10-11 14:28:46,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6668, PETRI_PLACES=185, PETRI_TRANSITIONS=386} [2024-10-11 14:28:46,617 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 157 predicate places. [2024-10-11 14:28:46,617 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 386 transitions, 6668 flow [2024-10-11 14:28:46,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:46,617 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:46,617 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:46,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:28:46,618 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)] === [2024-10-11 14:28:46,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1911593595, now seen corresponding path program 4 times [2024-10-11 14:28:46,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:46,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893850643] [2024-10-11 14:28:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:46,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:46,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:46,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893850643] [2024-10-11 14:28:46,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893850643] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:46,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769701131] [2024-10-11 14:28:46,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:28:46,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:46,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:46,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:28:46,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:28:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:46,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:28:46,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:46,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:47,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769701131] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:47,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:47,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-10-11 14:28:47,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547296289] [2024-10-11 14:28:47,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:47,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:28:47,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:47,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:28:47,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:28:47,127 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:47,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 386 transitions, 6668 flow. Second operand has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:47,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:47,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:47,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:48,679 INFO L124 PetriNetUnfolderBase]: 4437/6501 cut-off events. [2024-10-11 14:28:48,679 INFO L125 PetriNetUnfolderBase]: For 122069/122069 co-relation queries the response was YES. [2024-10-11 14:28:48,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49883 conditions, 6501 events. 4437/6501 cut-off events. For 122069/122069 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34379 event pairs, 1063 based on Foata normal form. 22/6523 useless extension candidates. Maximal degree in co-relation 49411. Up to 4694 conditions per place. [2024-10-11 14:28:48,736 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 452 selfloop transitions, 201 changer transitions 1/655 dead transitions. [2024-10-11 14:28:48,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 655 transitions, 12038 flow [2024-10-11 14:28:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:28:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:28:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 247 transitions. [2024-10-11 14:28:48,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4704761904761905 [2024-10-11 14:28:48,738 INFO L175 Difference]: Start difference. First operand has 185 places, 386 transitions, 6668 flow. Second operand 21 states and 247 transitions. [2024-10-11 14:28:48,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 655 transitions, 12038 flow [2024-10-11 14:28:49,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 655 transitions, 11828 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-10-11 14:28:49,269 INFO L231 Difference]: Finished difference. Result has 215 places, 515 transitions, 9669 flow [2024-10-11 14:28:49,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9669, PETRI_PLACES=215, PETRI_TRANSITIONS=515} [2024-10-11 14:28:49,270 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 187 predicate places. [2024-10-11 14:28:49,270 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 515 transitions, 9669 flow [2024-10-11 14:28:49,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:49,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:49,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:49,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:49,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:28:49,471 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)] === [2024-10-11 14:28:49,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:49,471 INFO L85 PathProgramCache]: Analyzing trace with hash 338449826, now seen corresponding path program 8 times [2024-10-11 14:28:49,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:49,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473960487] [2024-10-11 14:28:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:49,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:49,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:49,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473960487] [2024-10-11 14:28:49,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473960487] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:49,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:49,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:49,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486588787] [2024-10-11 14:28:49,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:49,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:49,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:49,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:49,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 515 transitions, 9669 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:49,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:49,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:49,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:51,425 INFO L124 PetriNetUnfolderBase]: 4601/6827 cut-off events. [2024-10-11 14:28:51,425 INFO L125 PetriNetUnfolderBase]: For 150457/150457 co-relation queries the response was YES. [2024-10-11 14:28:51,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57160 conditions, 6827 events. 4601/6827 cut-off events. For 150457/150457 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 37055 event pairs, 606 based on Foata normal form. 18/6845 useless extension candidates. Maximal degree in co-relation 56666. Up to 2466 conditions per place. [2024-10-11 14:28:51,515 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 345 selfloop transitions, 289 changer transitions 3/638 dead transitions. [2024-10-11 14:28:51,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 638 transitions, 12470 flow [2024-10-11 14:28:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:28:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:28:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-10-11 14:28:51,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.592 [2024-10-11 14:28:51,517 INFO L175 Difference]: Start difference. First operand has 215 places, 515 transitions, 9669 flow. Second operand 10 states and 148 transitions. [2024-10-11 14:28:51,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 638 transitions, 12470 flow [2024-10-11 14:28:52,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 638 transitions, 11749 flow, removed 328 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:52,324 INFO L231 Difference]: Finished difference. Result has 225 places, 536 transitions, 10206 flow [2024-10-11 14:28:52,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8972, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10206, PETRI_PLACES=225, PETRI_TRANSITIONS=536} [2024-10-11 14:28:52,326 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 197 predicate places. [2024-10-11 14:28:52,326 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 536 transitions, 10206 flow [2024-10-11 14:28:52,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:52,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:52,326 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:52,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 14:28:52,327 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)] === [2024-10-11 14:28:52,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:52,327 INFO L85 PathProgramCache]: Analyzing trace with hash -949778716, now seen corresponding path program 3 times [2024-10-11 14:28:52,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:52,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22083731] [2024-10-11 14:28:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:52,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22083731] [2024-10-11 14:28:52,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22083731] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:52,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:52,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439644650] [2024-10-11 14:28:52,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:52,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:52,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:52,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:52,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:52,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:52,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 536 transitions, 10206 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:52,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:52,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:52,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:54,026 INFO L124 PetriNetUnfolderBase]: 4611/6865 cut-off events. [2024-10-11 14:28:54,026 INFO L125 PetriNetUnfolderBase]: For 159090/159090 co-relation queries the response was YES. [2024-10-11 14:28:54,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57287 conditions, 6865 events. 4611/6865 cut-off events. For 159090/159090 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37667 event pairs, 1219 based on Foata normal form. 12/6877 useless extension candidates. Maximal degree in co-relation 56835. Up to 4676 conditions per place. [2024-10-11 14:28:54,108 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 505 selfloop transitions, 78 changer transitions 21/605 dead transitions. [2024-10-11 14:28:54,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 605 transitions, 12236 flow [2024-10-11 14:28:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:28:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:28:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-10-11 14:28:54,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5657142857142857 [2024-10-11 14:28:54,110 INFO L175 Difference]: Start difference. First operand has 225 places, 536 transitions, 10206 flow. Second operand 7 states and 99 transitions. [2024-10-11 14:28:54,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 605 transitions, 12236 flow [2024-10-11 14:28:55,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 605 transitions, 12115 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:55,052 INFO L231 Difference]: Finished difference. Result has 231 places, 533 transitions, 10186 flow [2024-10-11 14:28:55,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10085, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10186, PETRI_PLACES=231, PETRI_TRANSITIONS=533} [2024-10-11 14:28:55,053 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 203 predicate places. [2024-10-11 14:28:55,053 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 533 transitions, 10186 flow [2024-10-11 14:28:55,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:55,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:55,053 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:55,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 14:28:55,053 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)] === [2024-10-11 14:28:55,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:55,054 INFO L85 PathProgramCache]: Analyzing trace with hash 337231503, now seen corresponding path program 5 times [2024-10-11 14:28:55,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:55,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23019692] [2024-10-11 14:28:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:55,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:55,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:55,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23019692] [2024-10-11 14:28:55,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23019692] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:55,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092664865] [2024-10-11 14:28:55,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:28:55,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:55,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:55,170 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:55,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:28:55,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:55,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:55,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:28:55,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:55,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:55,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092664865] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:55,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:55,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-10-11 14:28:55,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53891977] [2024-10-11 14:28:55,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:55,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:28:55,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:55,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:28:55,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:28:55,471 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:55,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 533 transitions, 10186 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:55,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:55,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:55,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:57,360 INFO L124 PetriNetUnfolderBase]: 4783/7132 cut-off events. [2024-10-11 14:28:57,360 INFO L125 PetriNetUnfolderBase]: For 170605/170605 co-relation queries the response was YES. [2024-10-11 14:28:57,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59962 conditions, 7132 events. 4783/7132 cut-off events. For 170605/170605 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 39652 event pairs, 680 based on Foata normal form. 39/7171 useless extension candidates. Maximal degree in co-relation 59493. Up to 2441 conditions per place. [2024-10-11 14:28:57,427 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 579 selfloop transitions, 205 changer transitions 6/791 dead transitions. [2024-10-11 14:28:57,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 791 transitions, 15688 flow [2024-10-11 14:28:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:28:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:28:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 234 transitions. [2024-10-11 14:28:57,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4926315789473684 [2024-10-11 14:28:57,429 INFO L175 Difference]: Start difference. First operand has 231 places, 533 transitions, 10186 flow. Second operand 19 states and 234 transitions. [2024-10-11 14:28:57,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 791 transitions, 15688 flow [2024-10-11 14:28:58,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 791 transitions, 15502 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-10-11 14:28:58,327 INFO L231 Difference]: Finished difference. Result has 253 places, 589 transitions, 11672 flow [2024-10-11 14:28:58,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10020, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11672, PETRI_PLACES=253, PETRI_TRANSITIONS=589} [2024-10-11 14:28:58,328 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 225 predicate places. [2024-10-11 14:28:58,328 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 589 transitions, 11672 flow [2024-10-11 14:28:58,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:58,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:58,329 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:58,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:28:58,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:58,529 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)] === [2024-10-11 14:28:58,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2121965245, now seen corresponding path program 6 times [2024-10-11 14:28:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:58,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392810233] [2024-10-11 14:28:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:58,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:58,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:58,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392810233] [2024-10-11 14:28:58,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392810233] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:58,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:58,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:28:58,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336760123] [2024-10-11 14:28:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:58,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:28:58,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:58,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:28:58,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:28:58,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:28:58,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 589 transitions, 11672 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:58,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:58,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:28:58,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:00,369 INFO L124 PetriNetUnfolderBase]: 5141/7609 cut-off events. [2024-10-11 14:29:00,369 INFO L125 PetriNetUnfolderBase]: For 227783/227783 co-relation queries the response was YES. [2024-10-11 14:29:00,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69835 conditions, 7609 events. 5141/7609 cut-off events. For 227783/227783 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41868 event pairs, 1065 based on Foata normal form. 3/7612 useless extension candidates. Maximal degree in co-relation 69330. Up to 5450 conditions per place. [2024-10-11 14:29:00,683 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 419 selfloop transitions, 331 changer transitions 7/758 dead transitions. [2024-10-11 14:29:00,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 758 transitions, 16130 flow [2024-10-11 14:29:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:29:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:29:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-10-11 14:29:00,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-10-11 14:29:00,685 INFO L175 Difference]: Start difference. First operand has 253 places, 589 transitions, 11672 flow. Second operand 7 states and 83 transitions. [2024-10-11 14:29:00,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 758 transitions, 16130 flow [2024-10-11 14:29:01,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 758 transitions, 15715 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-10-11 14:29:01,808 INFO L231 Difference]: Finished difference. Result has 259 places, 657 transitions, 13740 flow [2024-10-11 14:29:01,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11359, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13740, PETRI_PLACES=259, PETRI_TRANSITIONS=657} [2024-10-11 14:29:01,809 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 231 predicate places. [2024-10-11 14:29:01,809 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 657 transitions, 13740 flow [2024-10-11 14:29:01,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:01,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:01,809 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:01,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-11 14:29:01,809 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)] === [2024-10-11 14:29:01,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1709730815, now seen corresponding path program 7 times [2024-10-11 14:29:01,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:01,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004642182] [2024-10-11 14:29:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:01,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:01,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004642182] [2024-10-11 14:29:01,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004642182] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:29:01,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:29:01,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:29:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811604138] [2024-10-11 14:29:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:01,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:29:01,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:01,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:29:01,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:29:01,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:01,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 657 transitions, 13740 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:01,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:01,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:01,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:03,851 INFO L124 PetriNetUnfolderBase]: 5223/7794 cut-off events. [2024-10-11 14:29:03,851 INFO L125 PetriNetUnfolderBase]: For 243172/243172 co-relation queries the response was YES. [2024-10-11 14:29:03,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74307 conditions, 7794 events. 5223/7794 cut-off events. For 243172/243172 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 43982 event pairs, 1444 based on Foata normal form. 24/7818 useless extension candidates. Maximal degree in co-relation 73797. Up to 6713 conditions per place. [2024-10-11 14:29:03,970 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 579 selfloop transitions, 167 changer transitions 12/759 dead transitions. [2024-10-11 14:29:03,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 759 transitions, 17206 flow [2024-10-11 14:29:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:29:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:29:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-10-11 14:29:03,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-10-11 14:29:03,972 INFO L175 Difference]: Start difference. First operand has 259 places, 657 transitions, 13740 flow. Second operand 7 states and 86 transitions. [2024-10-11 14:29:03,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 759 transitions, 17206 flow [2024-10-11 14:29:05,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 759 transitions, 16751 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-10-11 14:29:05,368 INFO L231 Difference]: Finished difference. Result has 266 places, 701 transitions, 14861 flow [2024-10-11 14:29:05,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=13330, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14861, PETRI_PLACES=266, PETRI_TRANSITIONS=701} [2024-10-11 14:29:05,369 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 238 predicate places. [2024-10-11 14:29:05,369 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 701 transitions, 14861 flow [2024-10-11 14:29:05,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:05,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:05,369 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:05,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-11 14:29:05,369 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)] === [2024-10-11 14:29:05,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:05,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1662095062, now seen corresponding path program 9 times [2024-10-11 14:29:05,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:05,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776058041] [2024-10-11 14:29:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:05,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:05,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776058041] [2024-10-11 14:29:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776058041] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423103433] [2024-10-11 14:29:05,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:29:05,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:05,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:05,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:05,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:29:05,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:29:05,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:05,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:29:05,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:05,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:05,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423103433] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:05,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:29:05,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 16 [2024-10-11 14:29:05,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023989871] [2024-10-11 14:29:05,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:05,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:29:05,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:05,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:29:05,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:29:05,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:05,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 701 transitions, 14861 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:05,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:05,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:05,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:07,694 INFO L124 PetriNetUnfolderBase]: 5183/7720 cut-off events. [2024-10-11 14:29:07,694 INFO L125 PetriNetUnfolderBase]: For 231666/231666 co-relation queries the response was YES. [2024-10-11 14:29:07,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72921 conditions, 7720 events. 5183/7720 cut-off events. For 231666/231666 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 43128 event pairs, 1083 based on Foata normal form. 18/7738 useless extension candidates. Maximal degree in co-relation 72606. Up to 4104 conditions per place. [2024-10-11 14:29:07,784 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 622 selfloop transitions, 133 changer transitions 2/758 dead transitions. [2024-10-11 14:29:07,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 758 transitions, 17043 flow [2024-10-11 14:29:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:29:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:29:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-10-11 14:29:07,785 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-10-11 14:29:07,785 INFO L175 Difference]: Start difference. First operand has 266 places, 701 transitions, 14861 flow. Second operand 6 states and 87 transitions. [2024-10-11 14:29:07,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 758 transitions, 17043 flow [2024-10-11 14:29:09,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 758 transitions, 16749 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-10-11 14:29:09,083 INFO L231 Difference]: Finished difference. Result has 269 places, 701 transitions, 14846 flow [2024-10-11 14:29:09,083 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14571, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14846, PETRI_PLACES=269, PETRI_TRANSITIONS=701} [2024-10-11 14:29:09,084 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 241 predicate places. [2024-10-11 14:29:09,084 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 701 transitions, 14846 flow [2024-10-11 14:29:09,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:09,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:09,084 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:09,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 14:29:09,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:09,285 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)] === [2024-10-11 14:29:09,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:09,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2143275138, now seen corresponding path program 10 times [2024-10-11 14:29:09,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:09,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974916884] [2024-10-11 14:29:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:09,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:09,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:09,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974916884] [2024-10-11 14:29:09,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974916884] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:29:09,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:29:09,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:29:09,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040808900] [2024-10-11 14:29:09,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:09,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:29:09,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:09,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:29:09,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:29:09,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:09,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 701 transitions, 14846 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:09,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:09,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:09,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:11,837 INFO L124 PetriNetUnfolderBase]: 5401/8155 cut-off events. [2024-10-11 14:29:11,838 INFO L125 PetriNetUnfolderBase]: For 238543/238543 co-relation queries the response was YES. [2024-10-11 14:29:11,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76078 conditions, 8155 events. 5401/8155 cut-off events. For 238543/238543 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 47028 event pairs, 425 based on Foata normal form. 37/8192 useless extension candidates. Maximal degree in co-relation 75537. Up to 2829 conditions per place. [2024-10-11 14:29:11,937 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 485 selfloop transitions, 442 changer transitions 5/933 dead transitions. [2024-10-11 14:29:11,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 933 transitions, 20870 flow [2024-10-11 14:29:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:29:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:29:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-10-11 14:29:11,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-10-11 14:29:11,938 INFO L175 Difference]: Start difference. First operand has 269 places, 701 transitions, 14846 flow. Second operand 10 states and 135 transitions. [2024-10-11 14:29:11,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 933 transitions, 20870 flow [2024-10-11 14:29:13,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 933 transitions, 20683 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-11 14:29:13,483 INFO L231 Difference]: Finished difference. Result has 280 places, 768 transitions, 17699 flow [2024-10-11 14:29:13,483 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14701, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17699, PETRI_PLACES=280, PETRI_TRANSITIONS=768} [2024-10-11 14:29:13,484 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 252 predicate places. [2024-10-11 14:29:13,484 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 768 transitions, 17699 flow [2024-10-11 14:29:13,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:13,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:13,484 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:13,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-11 14:29:13,484 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)] === [2024-10-11 14:29:13,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:13,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1361650664, now seen corresponding path program 11 times [2024-10-11 14:29:13,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:13,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128729636] [2024-10-11 14:29:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:13,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:13,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:13,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128729636] [2024-10-11 14:29:13,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128729636] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:13,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239245022] [2024-10-11 14:29:13,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:29:13,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:13,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:13,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:13,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:29:13,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:29:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:13,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:29:13,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:13,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:13,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239245022] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:13,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:29:13,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2024-10-11 14:29:13,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717269902] [2024-10-11 14:29:13,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:13,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:29:13,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:13,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:29:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:29:13,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:13,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 768 transitions, 17699 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:13,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:13,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:13,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:16,064 INFO L124 PetriNetUnfolderBase]: 5379/8124 cut-off events. [2024-10-11 14:29:16,064 INFO L125 PetriNetUnfolderBase]: For 262179/262179 co-relation queries the response was YES. [2024-10-11 14:29:16,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78997 conditions, 8124 events. 5379/8124 cut-off events. For 262179/262179 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46923 event pairs, 1089 based on Foata normal form. 18/8142 useless extension candidates. Maximal degree in co-relation 78443. Up to 4166 conditions per place. [2024-10-11 14:29:16,184 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 664 selfloop transitions, 183 changer transitions 2/850 dead transitions. [2024-10-11 14:29:16,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 850 transitions, 20635 flow [2024-10-11 14:29:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:29:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:29:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2024-10-11 14:29:16,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-10-11 14:29:16,186 INFO L175 Difference]: Start difference. First operand has 280 places, 768 transitions, 17699 flow. Second operand 6 states and 85 transitions. [2024-10-11 14:29:16,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 850 transitions, 20635 flow [2024-10-11 14:29:18,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 850 transitions, 20188 flow, removed 122 selfloop flow, removed 1 redundant places. [2024-10-11 14:29:18,227 INFO L231 Difference]: Finished difference. Result has 287 places, 774 transitions, 17964 flow [2024-10-11 14:29:18,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=17284, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17964, PETRI_PLACES=287, PETRI_TRANSITIONS=774} [2024-10-11 14:29:18,229 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 259 predicate places. [2024-10-11 14:29:18,229 INFO L471 AbstractCegarLoop]: Abstraction has has 287 places, 774 transitions, 17964 flow [2024-10-11 14:29:18,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:18,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:18,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:18,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:29:18,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:18,434 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)] === [2024-10-11 14:29:18,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:18,434 INFO L85 PathProgramCache]: Analyzing trace with hash 494536977, now seen corresponding path program 8 times [2024-10-11 14:29:18,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:18,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633069215] [2024-10-11 14:29:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:18,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:18,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:18,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633069215] [2024-10-11 14:29:18,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633069215] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:29:18,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:29:18,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:29:18,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208235523] [2024-10-11 14:29:18,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:18,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:29:18,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:29:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:29:18,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:18,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 774 transitions, 17964 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:18,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:18,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:18,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:20,720 INFO L124 PetriNetUnfolderBase]: 5443/8220 cut-off events. [2024-10-11 14:29:20,721 INFO L125 PetriNetUnfolderBase]: For 255672/255672 co-relation queries the response was YES. [2024-10-11 14:29:20,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80477 conditions, 8220 events. 5443/8220 cut-off events. For 255672/255672 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 47623 event pairs, 1305 based on Foata normal form. 3/8223 useless extension candidates. Maximal degree in co-relation 79908. Up to 5100 conditions per place. [2024-10-11 14:29:20,816 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 612 selfloop transitions, 216 changer transitions 8/837 dead transitions. [2024-10-11 14:29:20,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 837 transitions, 20611 flow [2024-10-11 14:29:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:29:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:29:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-10-11 14:29:20,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-10-11 14:29:20,817 INFO L175 Difference]: Start difference. First operand has 287 places, 774 transitions, 17964 flow. Second operand 7 states and 92 transitions. [2024-10-11 14:29:20,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 837 transitions, 20611 flow [2024-10-11 14:29:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 837 transitions, 20503 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-10-11 14:29:22,270 INFO L231 Difference]: Finished difference. Result has 295 places, 783 transitions, 18603 flow [2024-10-11 14:29:22,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=17856, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18603, PETRI_PLACES=295, PETRI_TRANSITIONS=783} [2024-10-11 14:29:22,271 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 267 predicate places. [2024-10-11 14:29:22,271 INFO L471 AbstractCegarLoop]: Abstraction has has 295 places, 783 transitions, 18603 flow [2024-10-11 14:29:22,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:22,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:22,272 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:22,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-11 14:29:22,272 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)] === [2024-10-11 14:29:22,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash 326095273, now seen corresponding path program 9 times [2024-10-11 14:29:22,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:22,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319966247] [2024-10-11 14:29:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:22,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:22,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:22,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319966247] [2024-10-11 14:29:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319966247] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:29:22,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:29:22,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:29:22,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100985558] [2024-10-11 14:29:22,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:22,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:29:22,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:22,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:29:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:29:22,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:22,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 783 transitions, 18603 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:22,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:22,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:22,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:24,796 INFO L124 PetriNetUnfolderBase]: 5445/8276 cut-off events. [2024-10-11 14:29:24,796 INFO L125 PetriNetUnfolderBase]: For 264695/264695 co-relation queries the response was YES. [2024-10-11 14:29:24,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82221 conditions, 8276 events. 5445/8276 cut-off events. For 264695/264695 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 48589 event pairs, 1317 based on Foata normal form. 21/8297 useless extension candidates. Maximal degree in co-relation 82035. Up to 5100 conditions per place. [2024-10-11 14:29:24,904 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 620 selfloop transitions, 211 changer transitions 12/844 dead transitions. [2024-10-11 14:29:24,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 844 transitions, 21146 flow [2024-10-11 14:29:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:29:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:29:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-10-11 14:29:24,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-10-11 14:29:24,905 INFO L175 Difference]: Start difference. First operand has 295 places, 783 transitions, 18603 flow. Second operand 7 states and 95 transitions. [2024-10-11 14:29:24,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 844 transitions, 21146 flow [2024-10-11 14:29:26,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 844 transitions, 20857 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-10-11 14:29:26,575 INFO L231 Difference]: Finished difference. Result has 299 places, 780 transitions, 18689 flow [2024-10-11 14:29:26,576 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18322, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18689, PETRI_PLACES=299, PETRI_TRANSITIONS=780} [2024-10-11 14:29:26,576 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 271 predicate places. [2024-10-11 14:29:26,576 INFO L471 AbstractCegarLoop]: Abstraction has has 299 places, 780 transitions, 18689 flow [2024-10-11 14:29:26,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:26,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:26,577 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:26,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-11 14:29:26,577 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)] === [2024-10-11 14:29:26,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -635418947, now seen corresponding path program 10 times [2024-10-11 14:29:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:26,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274226615] [2024-10-11 14:29:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:26,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274226615] [2024-10-11 14:29:26,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274226615] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011463123] [2024-10-11 14:29:26,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:29:26,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:26,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:26,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:29:26,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:29:26,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:26,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:29:26,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:26,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:27,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011463123] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:27,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:27,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-10-11 14:29:27,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090503632] [2024-10-11 14:29:27,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:27,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:29:27,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:27,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:29:27,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:29:27,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:27,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 780 transitions, 18689 flow. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:27,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:27,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:27,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:29,777 INFO L124 PetriNetUnfolderBase]: 5594/8482 cut-off events. [2024-10-11 14:29:29,778 INFO L125 PetriNetUnfolderBase]: For 269095/269095 co-relation queries the response was YES. [2024-10-11 14:29:29,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84819 conditions, 8482 events. 5594/8482 cut-off events. For 269095/269095 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 49889 event pairs, 836 based on Foata normal form. 25/8507 useless extension candidates. Maximal degree in co-relation 84574. Up to 2938 conditions per place. [2024-10-11 14:29:29,904 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 711 selfloop transitions, 320 changer transitions 4/1036 dead transitions. [2024-10-11 14:29:29,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1036 transitions, 25665 flow [2024-10-11 14:29:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:29:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:29:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 246 transitions. [2024-10-11 14:29:29,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2024-10-11 14:29:29,906 INFO L175 Difference]: Start difference. First operand has 299 places, 780 transitions, 18689 flow. Second operand 21 states and 246 transitions. [2024-10-11 14:29:29,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1036 transitions, 25665 flow [2024-10-11 14:29:31,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1036 transitions, 25231 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-11 14:29:31,624 INFO L231 Difference]: Finished difference. Result has 324 places, 832 transitions, 20390 flow [2024-10-11 14:29:31,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18257, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20390, PETRI_PLACES=324, PETRI_TRANSITIONS=832} [2024-10-11 14:29:31,625 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 296 predicate places. [2024-10-11 14:29:31,625 INFO L471 AbstractCegarLoop]: Abstraction has has 324 places, 832 transitions, 20390 flow [2024-10-11 14:29:31,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:31,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:31,626 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:31,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 14:29:31,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 14:29:31,827 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:29:31,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1878289090, now seen corresponding path program 12 times [2024-10-11 14:29:31,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:31,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499205524] [2024-10-11 14:29:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:31,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:31,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499205524] [2024-10-11 14:29:31,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499205524] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:29:31,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:29:31,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:29:31,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180388523] [2024-10-11 14:29:31,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:31,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:29:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:29:31,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:29:31,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:31,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 832 transitions, 20390 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:31,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:31,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:31,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:34,154 INFO L124 PetriNetUnfolderBase]: 5564/8416 cut-off events. [2024-10-11 14:29:34,155 INFO L125 PetriNetUnfolderBase]: For 279228/279228 co-relation queries the response was YES. [2024-10-11 14:29:34,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86954 conditions, 8416 events. 5564/8416 cut-off events. For 279228/279228 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 49252 event pairs, 885 based on Foata normal form. 22/8438 useless extension candidates. Maximal degree in co-relation 86530. Up to 4269 conditions per place. [2024-10-11 14:29:34,278 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 625 selfloop transitions, 289 changer transitions 2/917 dead transitions. [2024-10-11 14:29:34,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 917 transitions, 23404 flow [2024-10-11 14:29:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:29:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:29:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-10-11 14:29:34,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5771428571428572 [2024-10-11 14:29:34,279 INFO L175 Difference]: Start difference. First operand has 324 places, 832 transitions, 20390 flow. Second operand 7 states and 101 transitions. [2024-10-11 14:29:34,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 917 transitions, 23404 flow [2024-10-11 14:29:36,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 917 transitions, 22868 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-10-11 14:29:36,113 INFO L231 Difference]: Finished difference. Result has 323 places, 830 transitions, 20420 flow [2024-10-11 14:29:36,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=19842, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20420, PETRI_PLACES=323, PETRI_TRANSITIONS=830} [2024-10-11 14:29:36,114 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 295 predicate places. [2024-10-11 14:29:36,114 INFO L471 AbstractCegarLoop]: Abstraction has has 323 places, 830 transitions, 20420 flow [2024-10-11 14:29:36,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:36,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:36,114 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:36,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-11 14:29:36,114 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:29:36,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:36,114 INFO L85 PathProgramCache]: Analyzing trace with hash 752846590, now seen corresponding path program 13 times [2024-10-11 14:29:36,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:36,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013809713] [2024-10-11 14:29:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:36,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:36,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:36,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013809713] [2024-10-11 14:29:36,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013809713] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:29:36,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:29:36,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:29:36,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983445995] [2024-10-11 14:29:36,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:36,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:29:36,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:36,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:29:36,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:29:36,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:36,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 830 transitions, 20420 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:36,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:36,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:36,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:38,720 INFO L124 PetriNetUnfolderBase]: 5568/8424 cut-off events. [2024-10-11 14:29:38,721 INFO L125 PetriNetUnfolderBase]: For 282867/282867 co-relation queries the response was YES. [2024-10-11 14:29:38,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87240 conditions, 8424 events. 5568/8424 cut-off events. For 282867/282867 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 49419 event pairs, 1658 based on Foata normal form. 2/8426 useless extension candidates. Maximal degree in co-relation 86824. Up to 7398 conditions per place. [2024-10-11 14:29:38,830 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 678 selfloop transitions, 177 changer transitions 2/858 dead transitions. [2024-10-11 14:29:38,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 858 transitions, 22496 flow [2024-10-11 14:29:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:29:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:29:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-10-11 14:29:38,831 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-10-11 14:29:38,831 INFO L175 Difference]: Start difference. First operand has 323 places, 830 transitions, 20420 flow. Second operand 7 states and 84 transitions. [2024-10-11 14:29:38,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 858 transitions, 22496 flow [2024-10-11 14:29:40,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 858 transitions, 21908 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-11 14:29:40,898 INFO L231 Difference]: Finished difference. Result has 326 places, 837 transitions, 20379 flow [2024-10-11 14:29:40,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=19838, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20379, PETRI_PLACES=326, PETRI_TRANSITIONS=837} [2024-10-11 14:29:40,899 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 298 predicate places. [2024-10-11 14:29:40,899 INFO L471 AbstractCegarLoop]: Abstraction has has 326 places, 837 transitions, 20379 flow [2024-10-11 14:29:40,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:40,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:40,899 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:40,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-10-11 14:29:40,899 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:29:40,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1129145018, now seen corresponding path program 14 times [2024-10-11 14:29:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:40,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380499182] [2024-10-11 14:29:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:41,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:41,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380499182] [2024-10-11 14:29:41,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380499182] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:29:41,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:29:41,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:29:41,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968110554] [2024-10-11 14:29:41,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:41,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:29:41,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:41,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:29:41,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:29:41,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-10-11 14:29:41,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 837 transitions, 20379 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:41,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:41,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-10-11 14:29:41,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:43,622 INFO L124 PetriNetUnfolderBase]: 5833/8781 cut-off events. [2024-10-11 14:29:43,623 INFO L125 PetriNetUnfolderBase]: For 295000/295000 co-relation queries the response was YES. [2024-10-11 14:29:43,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90696 conditions, 8781 events. 5833/8781 cut-off events. For 295000/295000 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 51406 event pairs, 1635 based on Foata normal form. 15/8796 useless extension candidates. Maximal degree in co-relation 90278. Up to 7471 conditions per place. [2024-10-11 14:29:43,765 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 702 selfloop transitions, 213 changer transitions 0/916 dead transitions. [2024-10-11 14:29:43,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 916 transitions, 23562 flow [2024-10-11 14:29:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:29:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:29:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-10-11 14:29:43,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2024-10-11 14:29:43,767 INFO L175 Difference]: Start difference. First operand has 326 places, 837 transitions, 20379 flow. Second operand 7 states and 96 transitions. [2024-10-11 14:29:43,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 916 transitions, 23562 flow [2024-10-11 14:29:45,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 916 transitions, 23206 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-11 14:29:45,559 INFO L231 Difference]: Finished difference. Result has 331 places, 862 transitions, 21278 flow [2024-10-11 14:29:45,560 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=20023, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21278, PETRI_PLACES=331, PETRI_TRANSITIONS=862} [2024-10-11 14:29:45,560 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 303 predicate places. [2024-10-11 14:29:45,561 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 862 transitions, 21278 flow [2024-10-11 14:29:45,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:45,561 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:45,561 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:45,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-11 14:29:45,565 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:29:45,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash -809204988, now seen corresponding path program 15 times [2024-10-11 14:29:45,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:45,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011661304] [2024-10-11 14:29:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:45,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:45,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:45,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011661304] [2024-10-11 14:29:45,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011661304] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:45,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139780725] [2024-10-11 14:29:45,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:29:45,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:45,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:45,674 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:45,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:29:45,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:29:45,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:45,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:29:45,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:45,820 INFO L311 TraceCheckSpWp]: Computing backward predicates...