./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/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:33:10,746 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:33:10,830 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:33:10,836 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:33:10,840 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:33:10,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:33:10,868 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:33:10,869 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:33:10,869 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:33:10,870 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:33:10,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:33:10,871 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:33:10,871 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:33:10,872 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:33:10,873 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:33:10,874 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:33:10,874 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:33:10,874 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:33:10,874 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:33:10,875 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:33:10,875 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:33:10,879 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:33:10,879 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:33:10,879 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:33:10,879 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:33:10,880 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:33:10,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:33:10,880 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:33:10,880 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:33:10,880 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:33:10,880 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:33:10,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:33:10,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:33:10,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:33:10,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:33:10,881 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:33:10,881 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:33:10,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:33:10,882 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:33:10,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:33:10,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:33:10,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:33:10,883 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 [2024-10-24 12:33:11,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:33:11,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:33:11,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:33:11,124 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:33:11,124 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:33:11,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-10-24 12:33:12,473 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:33:12,669 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:33:12,670 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-10-24 12:33:12,676 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d4340e92/f65dfc4a8542493e8307f9e47995f8a7/FLAG49b32847c [2024-10-24 12:33:13,054 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d4340e92/f65dfc4a8542493e8307f9e47995f8a7 [2024-10-24 12:33:13,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:33:13,057 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:33:13,058 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:33:13,058 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:33:13,063 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:33:13,064 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,065 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@735506ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13, skipping insertion in model container [2024-10-24 12:33:13,065 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,090 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:33:13,263 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/popl20-figure3.wvr.c[2147,2160] [2024-10-24 12:33:13,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:33:13,274 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:33:13,290 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/popl20-figure3.wvr.c[2147,2160] [2024-10-24 12:33:13,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:33:13,306 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:33:13,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13 WrapperNode [2024-10-24 12:33:13,306 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:33:13,307 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:33:13,307 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:33:13,307 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:33:13,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,333 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2024-10-24 12:33:13,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:33:13,335 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:33:13,336 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:33:13,336 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:33:13,344 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,344 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,346 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,355 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]. [2024-10-24 12:33:13,355 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,355 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,358 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,361 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,361 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:33:13,363 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:33:13,363 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:33:13,363 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:33:13,364 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (1/1) ... [2024-10-24 12:33:13,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:33:13,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:13,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 12:33:13,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 12:33:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:33:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:33:13,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:33:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:33:13,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:33:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:33:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 12:33:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 12:33:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:33:13,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:33:13,457 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:33:13,529 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:33:13,531 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:33:13,696 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:33:13,697 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:33:13,802 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:33:13,803 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 12:33:13,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:33:13 BoogieIcfgContainer [2024-10-24 12:33:13,803 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:33:13,805 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:33:13,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:33:13,808 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:33:13,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:33:13" (1/3) ... [2024-10-24 12:33:13,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4e347b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:33:13, skipping insertion in model container [2024-10-24 12:33:13,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:13" (2/3) ... [2024-10-24 12:33:13,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4e347b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:33:13, skipping insertion in model container [2024-10-24 12:33:13,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:33:13" (3/3) ... [2024-10-24 12:33:13,814 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-10-24 12:33:13,829 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:33:13,830 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:33:13,830 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:33:13,873 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 12:33:13,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-10-24 12:33:13,926 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-24 12:33:13,927 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:33:13,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-24 12:33:13,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-10-24 12:33:13,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-10-24 12:33:13,941 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:33:13,947 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;@1692cff9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:33:13,948 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-24 12:33:13,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:33:13,959 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-10-24 12:33:13,959 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:33:13,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:13,961 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:13,962 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:13,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1596738301, now seen corresponding path program 1 times [2024-10-24 12:33:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:13,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965442712] [2024-10-24 12:33:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:14,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:14,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965442712] [2024-10-24 12:33:14,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965442712] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:14,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:14,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:33:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523362404] [2024-10-24 12:33:14,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:14,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:33:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:14,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:33:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:33:14,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-24 12:33:14,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-24 12:33:14,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:14,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-24 12:33:14,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:14,434 INFO L124 PetriNetUnfolderBase]: 76/157 cut-off events. [2024-10-24 12:33:14,434 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-24 12:33:14,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 157 events. 76/157 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 509 event pairs, 27 based on Foata normal form. 8/164 useless extension candidates. Maximal degree in co-relation 273. Up to 91 conditions per place. [2024-10-24 12:33:14,437 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-10-24 12:33:14,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 127 flow [2024-10-24 12:33:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:33:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:33:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-10-24 12:33:14,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-10-24 12:33:14,447 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 42 transitions. [2024-10-24 12:33:14,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 127 flow [2024-10-24 12:33:14,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 12:33:14,452 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2024-10-24 12:33:14,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-10-24 12:33:14,458 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2024-10-24 12:33:14,458 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2024-10-24 12:33:14,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-24 12:33:14,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:14,459 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:14,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:33:14,459 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:14,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:14,460 INFO L85 PathProgramCache]: Analyzing trace with hash 832542053, now seen corresponding path program 1 times [2024-10-24 12:33:14,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:14,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129352254] [2024-10-24 12:33:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:14,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:14,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:14,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129352254] [2024-10-24 12:33:14,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129352254] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:14,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:14,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:33:14,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402344087] [2024-10-24 12:33:14,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:14,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:33:14,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:33:14,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:33:14,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:14,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-10-24 12:33:14,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:14,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:14,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:14,747 INFO L124 PetriNetUnfolderBase]: 138/266 cut-off events. [2024-10-24 12:33:14,747 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-24 12:33:14,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 266 events. 138/266 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1056 event pairs, 60 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 227. Up to 172 conditions per place. [2024-10-24 12:33:14,750 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 29 selfloop transitions, 7 changer transitions 3/42 dead transitions. [2024-10-24 12:33:14,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 42 transitions, 183 flow [2024-10-24 12:33:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:33:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:33:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-10-24 12:33:14,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-24 12:33:14,752 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 5 states and 60 transitions. [2024-10-24 12:33:14,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 42 transitions, 183 flow [2024-10-24 12:33:14,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:33:14,753 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 106 flow [2024-10-24 12:33:14,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-10-24 12:33:14,754 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-10-24 12:33:14,754 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 106 flow [2024-10-24 12:33:14,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-10-24 12:33:14,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:14,755 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:14,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:33:14,755 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:14,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:14,756 INFO L85 PathProgramCache]: Analyzing trace with hash -558101359, now seen corresponding path program 2 times [2024-10-24 12:33:14,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:14,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422214018] [2024-10-24 12:33:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:14,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:14,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:14,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422214018] [2024-10-24 12:33:14,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422214018] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:14,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:14,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 12:33:14,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876904152] [2024-10-24 12:33:14,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:14,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:33:14,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:33:14,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:33:14,881 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:14,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-10-24 12:33:14,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:14,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:14,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:15,012 INFO L124 PetriNetUnfolderBase]: 158/300 cut-off events. [2024-10-24 12:33:15,013 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-10-24 12:33:15,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 300 events. 158/300 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1220 event pairs, 4 based on Foata normal form. 9/307 useless extension candidates. Maximal degree in co-relation 387. Up to 124 conditions per place. [2024-10-24 12:33:15,025 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 45 selfloop transitions, 13 changer transitions 1/62 dead transitions. [2024-10-24 12:33:15,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 62 transitions, 350 flow [2024-10-24 12:33:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:33:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:33:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-10-24 12:33:15,030 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-24 12:33:15,030 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 106 flow. Second operand 7 states and 84 transitions. [2024-10-24 12:33:15,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 62 transitions, 350 flow [2024-10-24 12:33:15,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 62 transitions, 348 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-24 12:33:15,035 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 212 flow [2024-10-24 12:33:15,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-10-24 12:33:15,040 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 17 predicate places. [2024-10-24 12:33:15,040 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 212 flow [2024-10-24 12:33:15,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-10-24 12:33:15,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:15,041 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:15,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:33:15,041 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:15,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:15,042 INFO L85 PathProgramCache]: Analyzing trace with hash 579789325, now seen corresponding path program 3 times [2024-10-24 12:33:15,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:15,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233199761] [2024-10-24 12:33:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:15,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:15,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:15,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233199761] [2024-10-24 12:33:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233199761] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:15,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:15,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:33:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128052693] [2024-10-24 12:33:15,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:15,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:33:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:33:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:33:15,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:15,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-10-24 12:33:15,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:15,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:15,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:15,292 INFO L124 PetriNetUnfolderBase]: 207/392 cut-off events. [2024-10-24 12:33:15,293 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2024-10-24 12:33:15,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1424 conditions, 392 events. 207/392 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1557 event pairs, 65 based on Foata normal form. 6/393 useless extension candidates. Maximal degree in co-relation 947. Up to 168 conditions per place. [2024-10-24 12:33:15,297 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 41 selfloop transitions, 10 changer transitions 2/56 dead transitions. [2024-10-24 12:33:15,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 431 flow [2024-10-24 12:33:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:33:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:33:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-10-24 12:33:15,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-10-24 12:33:15,302 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 212 flow. Second operand 5 states and 57 transitions. [2024-10-24 12:33:15,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 431 flow [2024-10-24 12:33:15,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:33:15,307 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 268 flow [2024-10-24 12:33:15,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2024-10-24 12:33:15,308 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 24 predicate places. [2024-10-24 12:33:15,308 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 268 flow [2024-10-24 12:33:15,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-10-24 12:33:15,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:15,309 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:15,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:33:15,309 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:15,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1175860589, now seen corresponding path program 4 times [2024-10-24 12:33:15,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:15,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665682374] [2024-10-24 12:33:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:15,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:15,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665682374] [2024-10-24 12:33:15,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665682374] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144817056] [2024-10-24 12:33:15,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:33:15,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:15,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:15,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:15,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:33:15,443 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:33:15,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:15,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:33:15,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:15,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144817056] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:15,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:15,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-10-24 12:33:15,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595224613] [2024-10-24 12:33:15,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:15,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:33:15,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:15,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:33:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:33:15,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:15,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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) [2024-10-24 12:33:15,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:15,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:15,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:15,854 INFO L124 PetriNetUnfolderBase]: 302/564 cut-off events. [2024-10-24 12:33:15,854 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2024-10-24 12:33:15,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 564 events. 302/564 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2598 event pairs, 33 based on Foata normal form. 9/565 useless extension candidates. Maximal degree in co-relation 1549. Up to 155 conditions per place. [2024-10-24 12:33:15,859 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 48 selfloop transitions, 35 changer transitions 2/88 dead transitions. [2024-10-24 12:33:15,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 739 flow [2024-10-24 12:33:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:33:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 12:33:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-10-24 12:33:15,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-10-24 12:33:15,863 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 268 flow. Second operand 10 states and 114 transitions. [2024-10-24 12:33:15,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 739 flow [2024-10-24 12:33:15,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 715 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-24 12:33:15,871 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 520 flow [2024-10-24 12:33:15,871 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=520, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-10-24 12:33:15,871 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 36 predicate places. [2024-10-24 12:33:15,872 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 520 flow [2024-10-24 12:33:15,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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) [2024-10-24 12:33:15,873 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:15,873 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:15,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:33:16,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:16,077 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:16,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:16,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2014856815, now seen corresponding path program 5 times [2024-10-24 12:33:16,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:16,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938166643] [2024-10-24 12:33:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:16,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:16,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:16,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938166643] [2024-10-24 12:33:16,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938166643] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:16,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:16,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:33:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630754442] [2024-10-24 12:33:16,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:16,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:33:16,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:33:16,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:33:16,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:16,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-10-24 12:33:16,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:16,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:16,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:16,230 INFO L124 PetriNetUnfolderBase]: 304/565 cut-off events. [2024-10-24 12:33:16,230 INFO L125 PetriNetUnfolderBase]: For 2946/2946 co-relation queries the response was YES. [2024-10-24 12:33:16,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 565 events. 304/565 cut-off events. For 2946/2946 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2521 event pairs, 89 based on Foata normal form. 2/562 useless extension candidates. Maximal degree in co-relation 2023. Up to 294 conditions per place. [2024-10-24 12:33:16,234 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 47 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-10-24 12:33:16,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 791 flow [2024-10-24 12:33:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:33:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:33:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-10-24 12:33:16,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-10-24 12:33:16,236 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 520 flow. Second operand 5 states and 58 transitions. [2024-10-24 12:33:16,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 791 flow [2024-10-24 12:33:16,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 711 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-10-24 12:33:16,244 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 553 flow [2024-10-24 12:33:16,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=553, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-10-24 12:33:16,245 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 38 predicate places. [2024-10-24 12:33:16,245 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 553 flow [2024-10-24 12:33:16,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-10-24 12:33:16,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:16,245 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:16,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:33:16,246 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:16,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:16,246 INFO L85 PathProgramCache]: Analyzing trace with hash 311973905, now seen corresponding path program 6 times [2024-10-24 12:33:16,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:16,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002348696] [2024-10-24 12:33:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:16,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:16,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:16,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002348696] [2024-10-24 12:33:16,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002348696] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:16,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 12:33:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629643962] [2024-10-24 12:33:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:16,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:33:16,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:33:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:33:16,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:16,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 553 flow. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-10-24 12:33:16,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:16,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:16,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:16,416 INFO L124 PetriNetUnfolderBase]: 302/558 cut-off events. [2024-10-24 12:33:16,417 INFO L125 PetriNetUnfolderBase]: For 2921/2921 co-relation queries the response was YES. [2024-10-24 12:33:16,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2629 conditions, 558 events. 302/558 cut-off events. For 2921/2921 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2423 event pairs, 86 based on Foata normal form. 7/560 useless extension candidates. Maximal degree in co-relation 2057. Up to 275 conditions per place. [2024-10-24 12:33:16,421 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 45 selfloop transitions, 26 changer transitions 0/74 dead transitions. [2024-10-24 12:33:16,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 784 flow [2024-10-24 12:33:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:33:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:33:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-10-24 12:33:16,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-10-24 12:33:16,423 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 553 flow. Second operand 6 states and 67 transitions. [2024-10-24 12:33:16,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 784 flow [2024-10-24 12:33:16,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 74 transitions, 738 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-10-24 12:33:16,431 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 583 flow [2024-10-24 12:33:16,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=583, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-10-24 12:33:16,432 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 39 predicate places. [2024-10-24 12:33:16,432 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 583 flow [2024-10-24 12:33:16,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-10-24 12:33:16,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:16,432 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:16,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 12:33:16,433 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:16,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1400090670, now seen corresponding path program 1 times [2024-10-24 12:33:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:16,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341574577] [2024-10-24 12:33:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:16,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:16,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341574577] [2024-10-24 12:33:16,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341574577] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:16,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422698148] [2024-10-24 12:33:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:16,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:16,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:16,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:16,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:33:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:16,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 12:33:16,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:33:16,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:33:16,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422698148] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:16,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:16,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-10-24 12:33:16,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416253112] [2024-10-24 12:33:16,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:16,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:33:16,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:33:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:33:16,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-24 12:33:16,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 583 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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) [2024-10-24 12:33:16,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:16,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-24 12:33:16,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:16,814 INFO L124 PetriNetUnfolderBase]: 460/908 cut-off events. [2024-10-24 12:33:16,814 INFO L125 PetriNetUnfolderBase]: For 4604/4649 co-relation queries the response was YES. [2024-10-24 12:33:16,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 908 events. 460/908 cut-off events. For 4604/4649 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4677 event pairs, 76 based on Foata normal form. 18/921 useless extension candidates. Maximal degree in co-relation 2392. Up to 362 conditions per place. [2024-10-24 12:33:16,820 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 72 selfloop transitions, 5 changer transitions 6/100 dead transitions. [2024-10-24 12:33:16,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 1092 flow [2024-10-24 12:33:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:33:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:33:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-10-24 12:33:16,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-10-24 12:33:16,821 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 583 flow. Second operand 4 states and 62 transitions. [2024-10-24 12:33:16,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 1092 flow [2024-10-24 12:33:16,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 1031 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-24 12:33:16,828 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 579 flow [2024-10-24 12:33:16,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=579, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-10-24 12:33:16,829 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 41 predicate places. [2024-10-24 12:33:16,829 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 579 flow [2024-10-24 12:33:16,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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) [2024-10-24 12:33:16,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:16,830 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:16,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 12:33:17,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-24 12:33:17,030 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:17,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:17,031 INFO L85 PathProgramCache]: Analyzing trace with hash 617942674, now seen corresponding path program 2 times [2024-10-24 12:33:17,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:17,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496176485] [2024-10-24 12:33:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:17,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:17,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:17,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496176485] [2024-10-24 12:33:17,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496176485] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:17,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102808844] [2024-10-24 12:33:17,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:33:17,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:17,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:17,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:17,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:33:17,274 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:33:17,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:17,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:17,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:17,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102808844] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:17,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 12:33:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051727257] [2024-10-24 12:33:17,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:17,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:33:17,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:33:17,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:33:17,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:17,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 579 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2024-10-24 12:33:17,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:17,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:17,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:18,424 INFO L124 PetriNetUnfolderBase]: 1125/1921 cut-off events. [2024-10-24 12:33:18,425 INFO L125 PetriNetUnfolderBase]: For 9010/9036 co-relation queries the response was YES. [2024-10-24 12:33:18,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9391 conditions, 1921 events. 1125/1921 cut-off events. For 9010/9036 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9453 event pairs, 66 based on Foata normal form. 22/1941 useless extension candidates. Maximal degree in co-relation 5537. Up to 665 conditions per place. [2024-10-24 12:33:18,441 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 121 selfloop transitions, 87 changer transitions 7/220 dead transitions. [2024-10-24 12:33:18,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 220 transitions, 2345 flow [2024-10-24 12:33:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 12:33:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 12:33:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 231 transitions. [2024-10-24 12:33:18,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-24 12:33:18,442 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 579 flow. Second operand 21 states and 231 transitions. [2024-10-24 12:33:18,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 220 transitions, 2345 flow [2024-10-24 12:33:18,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 220 transitions, 2313 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-10-24 12:33:18,453 INFO L231 Difference]: Finished difference. Result has 94 places, 126 transitions, 1475 flow [2024-10-24 12:33:18,454 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1475, PETRI_PLACES=94, PETRI_TRANSITIONS=126} [2024-10-24 12:33:18,454 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 70 predicate places. [2024-10-24 12:33:18,454 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 126 transitions, 1475 flow [2024-10-24 12:33:18,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2024-10-24 12:33:18,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:18,455 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:18,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 12:33:18,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:18,659 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:18,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash -754753068, now seen corresponding path program 3 times [2024-10-24 12:33:18,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:18,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361098061] [2024-10-24 12:33:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:18,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:18,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361098061] [2024-10-24 12:33:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361098061] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287873487] [2024-10-24 12:33:18,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:33:18,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:18,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:18,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:18,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:33:18,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:33:18,814 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:18,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:18,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:18,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:18,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287873487] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:18,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:18,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 12:33:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051443016] [2024-10-24 12:33:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:18,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:33:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:33:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:33:18,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:18,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 126 transitions, 1475 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-10-24 12:33:18,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:18,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:18,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:19,399 INFO L124 PetriNetUnfolderBase]: 1223/2101 cut-off events. [2024-10-24 12:33:19,400 INFO L125 PetriNetUnfolderBase]: For 22664/22700 co-relation queries the response was YES. [2024-10-24 12:33:19,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12519 conditions, 2101 events. 1223/2101 cut-off events. For 22664/22700 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10797 event pairs, 171 based on Foata normal form. 28/2121 useless extension candidates. Maximal degree in co-relation 8237. Up to 898 conditions per place. [2024-10-24 12:33:19,421 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 123 selfloop transitions, 75 changer transitions 11/214 dead transitions. [2024-10-24 12:33:19,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 214 transitions, 2841 flow [2024-10-24 12:33:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 12:33:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 12:33:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 155 transitions. [2024-10-24 12:33:19,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-10-24 12:33:19,422 INFO L175 Difference]: Start difference. First operand has 94 places, 126 transitions, 1475 flow. Second operand 15 states and 155 transitions. [2024-10-24 12:33:19,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 214 transitions, 2841 flow [2024-10-24 12:33:19,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 214 transitions, 2499 flow, removed 154 selfloop flow, removed 3 redundant places. [2024-10-24 12:33:19,450 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1827 flow [2024-10-24 12:33:19,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1827, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-10-24 12:33:19,451 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 91 predicate places. [2024-10-24 12:33:19,451 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1827 flow [2024-10-24 12:33:19,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-10-24 12:33:19,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:19,451 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:19,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 12:33:19,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:19,652 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:19,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash 346791640, now seen corresponding path program 4 times [2024-10-24 12:33:19,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:19,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086119713] [2024-10-24 12:33:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:19,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086119713] [2024-10-24 12:33:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086119713] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088806152] [2024-10-24 12:33:19,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:33:19,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:19,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:19,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:19,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:33:19,838 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:33:19,839 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:19,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:19,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:19,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:19,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088806152] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:19,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:19,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-24 12:33:19,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543437568] [2024-10-24 12:33:19,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:19,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 12:33:19,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 12:33:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:33:19,960 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:19,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1827 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 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) [2024-10-24 12:33:19,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:19,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:19,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:20,626 INFO L124 PetriNetUnfolderBase]: 1662/2815 cut-off events. [2024-10-24 12:33:20,626 INFO L125 PetriNetUnfolderBase]: For 29389/29421 co-relation queries the response was YES. [2024-10-24 12:33:20,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16587 conditions, 2815 events. 1662/2815 cut-off events. For 29389/29421 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15024 event pairs, 37 based on Foata normal form. 70/2869 useless extension candidates. Maximal degree in co-relation 16142. Up to 899 conditions per place. [2024-10-24 12:33:20,653 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 127 selfloop transitions, 234 changer transitions 3/369 dead transitions. [2024-10-24 12:33:20,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 369 transitions, 4845 flow [2024-10-24 12:33:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 12:33:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 12:33:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 228 transitions. [2024-10-24 12:33:20,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4505928853754941 [2024-10-24 12:33:20,655 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1827 flow. Second operand 23 states and 228 transitions. [2024-10-24 12:33:20,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 369 transitions, 4845 flow [2024-10-24 12:33:20,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 369 transitions, 4706 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-10-24 12:33:20,705 INFO L231 Difference]: Finished difference. Result has 143 places, 286 transitions, 4253 flow [2024-10-24 12:33:20,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4253, PETRI_PLACES=143, PETRI_TRANSITIONS=286} [2024-10-24 12:33:20,705 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 119 predicate places. [2024-10-24 12:33:20,706 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 286 transitions, 4253 flow [2024-10-24 12:33:20,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 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) [2024-10-24 12:33:20,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:20,706 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:20,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-24 12:33:20,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-24 12:33:20,907 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:20,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:20,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1026085048, now seen corresponding path program 5 times [2024-10-24 12:33:20,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:20,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707260020] [2024-10-24 12:33:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707260020] [2024-10-24 12:33:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707260020] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101814287] [2024-10-24 12:33:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:33:21,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:21,013 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:21,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 12:33:21,055 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:33:21,055 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:21,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:33:21,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:21,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:21,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101814287] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:21,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:21,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-24 12:33:21,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599246300] [2024-10-24 12:33:21,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:21,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:33:21,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:33:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:33:21,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:21,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 286 transitions, 4253 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 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) [2024-10-24 12:33:21,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:21,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:21,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:22,726 INFO L124 PetriNetUnfolderBase]: 2330/4008 cut-off events. [2024-10-24 12:33:22,726 INFO L125 PetriNetUnfolderBase]: For 49556/49602 co-relation queries the response was YES. [2024-10-24 12:33:22,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26609 conditions, 4008 events. 2330/4008 cut-off events. For 49556/49602 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23531 event pairs, 87 based on Foata normal form. 142/4130 useless extension candidates. Maximal degree in co-relation 26193. Up to 1248 conditions per place. [2024-10-24 12:33:22,769 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 156 selfloop transitions, 412 changer transitions 7/580 dead transitions. [2024-10-24 12:33:22,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 580 transitions, 9060 flow [2024-10-24 12:33:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-24 12:33:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-24 12:33:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 342 transitions. [2024-10-24 12:33:22,772 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4201474201474201 [2024-10-24 12:33:22,773 INFO L175 Difference]: Start difference. First operand has 143 places, 286 transitions, 4253 flow. Second operand 37 states and 342 transitions. [2024-10-24 12:33:22,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 580 transitions, 9060 flow [2024-10-24 12:33:22,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 580 transitions, 7807 flow, removed 547 selfloop flow, removed 3 redundant places. [2024-10-24 12:33:22,937 INFO L231 Difference]: Finished difference. Result has 193 places, 457 transitions, 7343 flow [2024-10-24 12:33:22,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3735, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7343, PETRI_PLACES=193, PETRI_TRANSITIONS=457} [2024-10-24 12:33:22,938 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 169 predicate places. [2024-10-24 12:33:22,939 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 457 transitions, 7343 flow [2024-10-24 12:33:22,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 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) [2024-10-24 12:33:22,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:22,940 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:22,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 12:33:23,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:23,145 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:23,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1591637122, now seen corresponding path program 6 times [2024-10-24 12:33:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:23,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135311641] [2024-10-24 12:33:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:23,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:23,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:23,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135311641] [2024-10-24 12:33:23,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135311641] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:23,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982317955] [2024-10-24 12:33:23,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:33:23,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:23,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:23,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:23,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 12:33:23,384 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:33:23,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:23,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:23,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:23,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:23,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982317955] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:23,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:23,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-24 12:33:23,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56916613] [2024-10-24 12:33:23,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:23,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:33:23,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:23,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:33:23,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:33:23,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:23,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 457 transitions, 7343 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 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) [2024-10-24 12:33:23,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:23,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:23,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:24,868 INFO L124 PetriNetUnfolderBase]: 2879/4991 cut-off events. [2024-10-24 12:33:24,868 INFO L125 PetriNetUnfolderBase]: For 63005/63057 co-relation queries the response was YES. [2024-10-24 12:33:24,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34008 conditions, 4991 events. 2879/4991 cut-off events. For 63005/63057 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30727 event pairs, 110 based on Foata normal form. 66/5017 useless extension candidates. Maximal degree in co-relation 32941. Up to 957 conditions per place. [2024-10-24 12:33:24,929 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 184 selfloop transitions, 509 changer transitions 5/703 dead transitions. [2024-10-24 12:33:24,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 703 transitions, 11923 flow [2024-10-24 12:33:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-24 12:33:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-10-24 12:33:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 327 transitions. [2024-10-24 12:33:24,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-10-24 12:33:24,931 INFO L175 Difference]: Start difference. First operand has 193 places, 457 transitions, 7343 flow. Second operand 33 states and 327 transitions. [2024-10-24 12:33:24,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 703 transitions, 11923 flow [2024-10-24 12:33:25,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 703 transitions, 10902 flow, removed 309 selfloop flow, removed 8 redundant places. [2024-10-24 12:33:25,355 INFO L231 Difference]: Finished difference. Result has 225 places, 595 transitions, 10155 flow [2024-10-24 12:33:25,356 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10155, PETRI_PLACES=225, PETRI_TRANSITIONS=595} [2024-10-24 12:33:25,356 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 201 predicate places. [2024-10-24 12:33:25,357 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 595 transitions, 10155 flow [2024-10-24 12:33:25,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 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) [2024-10-24 12:33:25,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:25,358 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:25,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 12:33:25,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:25,559 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:25,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1325954112, now seen corresponding path program 7 times [2024-10-24 12:33:25,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:25,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106341106] [2024-10-24 12:33:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:25,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:25,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:25,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106341106] [2024-10-24 12:33:25,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106341106] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:25,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364323236] [2024-10-24 12:33:25,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:33:25,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:25,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:25,754 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:25,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 12:33:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:25,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:25,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:25,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:25,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364323236] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:25,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:25,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-24 12:33:25,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585698906] [2024-10-24 12:33:25,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:25,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:33:25,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:25,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:33:25,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:33:25,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:25,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 595 transitions, 10155 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 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) [2024-10-24 12:33:25,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:25,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:25,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:27,498 INFO L124 PetriNetUnfolderBase]: 3233/5574 cut-off events. [2024-10-24 12:33:27,499 INFO L125 PetriNetUnfolderBase]: For 77004/77058 co-relation queries the response was YES. [2024-10-24 12:33:27,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39625 conditions, 5574 events. 3233/5574 cut-off events. For 77004/77058 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 34084 event pairs, 227 based on Foata normal form. 40/5576 useless extension candidates. Maximal degree in co-relation 39117. Up to 1116 conditions per place. [2024-10-24 12:33:27,567 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 237 selfloop transitions, 507 changer transitions 3/752 dead transitions. [2024-10-24 12:33:27,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 752 transitions, 13796 flow [2024-10-24 12:33:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 12:33:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 12:33:27,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 250 transitions. [2024-10-24 12:33:27,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49407114624505927 [2024-10-24 12:33:27,568 INFO L175 Difference]: Start difference. First operand has 225 places, 595 transitions, 10155 flow. Second operand 23 states and 250 transitions. [2024-10-24 12:33:27,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 752 transitions, 13796 flow [2024-10-24 12:33:28,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 752 transitions, 13518 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-10-24 12:33:28,152 INFO L231 Difference]: Finished difference. Result has 245 places, 660 transitions, 12460 flow [2024-10-24 12:33:28,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9780, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12460, PETRI_PLACES=245, PETRI_TRANSITIONS=660} [2024-10-24 12:33:28,153 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 221 predicate places. [2024-10-24 12:33:28,153 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 660 transitions, 12460 flow [2024-10-24 12:33:28,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 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) [2024-10-24 12:33:28,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:28,153 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:28,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 12:33:28,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-24 12:33:28,354 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:28,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:28,354 INFO L85 PathProgramCache]: Analyzing trace with hash -60427610, now seen corresponding path program 8 times [2024-10-24 12:33:28,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:28,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554918570] [2024-10-24 12:33:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:28,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:28,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:28,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554918570] [2024-10-24 12:33:28,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554918570] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:28,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44192432] [2024-10-24 12:33:28,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:33:28,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:28,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:28,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:28,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 12:33:28,494 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:33:28,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:28,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:28,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:28,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:28,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44192432] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:28,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:28,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-24 12:33:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753982767] [2024-10-24 12:33:28,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:28,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 12:33:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:28,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 12:33:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:33:28,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:28,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 660 transitions, 12460 flow. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 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) [2024-10-24 12:33:28,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:28,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:28,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:30,754 INFO L124 PetriNetUnfolderBase]: 4095/7043 cut-off events. [2024-10-24 12:33:30,755 INFO L125 PetriNetUnfolderBase]: For 117761/117825 co-relation queries the response was YES. [2024-10-24 12:33:30,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53687 conditions, 7043 events. 4095/7043 cut-off events. For 117761/117825 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 44957 event pairs, 297 based on Foata normal form. 82/7059 useless extension candidates. Maximal degree in co-relation 52822. Up to 1329 conditions per place. [2024-10-24 12:33:30,943 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 242 selfloop transitions, 691 changer transitions 9/947 dead transitions. [2024-10-24 12:33:30,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 947 transitions, 19101 flow [2024-10-24 12:33:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-24 12:33:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-24 12:33:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 278 transitions. [2024-10-24 12:33:30,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-10-24 12:33:30,946 INFO L175 Difference]: Start difference. First operand has 245 places, 660 transitions, 12460 flow. Second operand 28 states and 278 transitions. [2024-10-24 12:33:30,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 947 transitions, 19101 flow [2024-10-24 12:33:32,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 947 transitions, 18582 flow, removed 127 selfloop flow, removed 5 redundant places. [2024-10-24 12:33:32,044 INFO L231 Difference]: Finished difference. Result has 275 places, 865 transitions, 18660 flow [2024-10-24 12:33:32,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12055, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18660, PETRI_PLACES=275, PETRI_TRANSITIONS=865} [2024-10-24 12:33:32,046 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 251 predicate places. [2024-10-24 12:33:32,046 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 865 transitions, 18660 flow [2024-10-24 12:33:32,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 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) [2024-10-24 12:33:32,046 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:32,046 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:32,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 12:33:32,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-24 12:33:32,247 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:32,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:32,247 INFO L85 PathProgramCache]: Analyzing trace with hash -248406802, now seen corresponding path program 9 times [2024-10-24 12:33:32,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:32,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45994924] [2024-10-24 12:33:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:32,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45994924] [2024-10-24 12:33:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45994924] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924120483] [2024-10-24 12:33:32,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:33:32,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:32,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:32,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:32,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 12:33:32,382 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:33:32,383 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:32,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:32,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:32,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:32,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924120483] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:32,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:32,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 12:33:32,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197795563] [2024-10-24 12:33:32,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:32,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:33:32,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:32,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:33:32,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:33:32,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:32,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 865 transitions, 18660 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-10-24 12:33:32,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:32,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:32,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:34,295 INFO L124 PetriNetUnfolderBase]: 4066/7007 cut-off events. [2024-10-24 12:33:34,295 INFO L125 PetriNetUnfolderBase]: For 142227/142287 co-relation queries the response was YES. [2024-10-24 12:33:34,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58388 conditions, 7007 events. 4066/7007 cut-off events. For 142227/142287 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 45100 event pairs, 626 based on Foata normal form. 40/6969 useless extension candidates. Maximal degree in co-relation 57566. Up to 2819 conditions per place. [2024-10-24 12:33:34,390 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 398 selfloop transitions, 501 changer transitions 3/907 dead transitions. [2024-10-24 12:33:34,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 907 transitions, 20775 flow [2024-10-24 12:33:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 12:33:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 12:33:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 147 transitions. [2024-10-24 12:33:34,392 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-10-24 12:33:34,392 INFO L175 Difference]: Start difference. First operand has 275 places, 865 transitions, 18660 flow. Second operand 14 states and 147 transitions. [2024-10-24 12:33:34,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 907 transitions, 20775 flow [2024-10-24 12:33:35,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 907 transitions, 19966 flow, removed 202 selfloop flow, removed 9 redundant places. [2024-10-24 12:33:35,734 INFO L231 Difference]: Finished difference. Result has 280 places, 865 transitions, 18876 flow [2024-10-24 12:33:35,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=17814, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18876, PETRI_PLACES=280, PETRI_TRANSITIONS=865} [2024-10-24 12:33:35,735 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 256 predicate places. [2024-10-24 12:33:35,735 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 865 transitions, 18876 flow [2024-10-24 12:33:35,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-10-24 12:33:35,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:35,736 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:35,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 12:33:35,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-24 12:33:35,937 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:35,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1083488188, now seen corresponding path program 10 times [2024-10-24 12:33:35,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:35,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838270368] [2024-10-24 12:33:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:35,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:36,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:36,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838270368] [2024-10-24 12:33:36,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838270368] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:36,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30704463] [2024-10-24 12:33:36,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:33:36,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:36,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:36,025 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:36,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 12:33:36,096 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:33:36,097 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:36,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:36,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:36,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:36,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30704463] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:36,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:36,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 12:33:36,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256523274] [2024-10-24 12:33:36,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:36,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:33:36,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:33:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:33:36,263 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:36,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 865 transitions, 18876 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2024-10-24 12:33:36,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:36,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:36,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:39,265 INFO L124 PetriNetUnfolderBase]: 4901/8548 cut-off events. [2024-10-24 12:33:39,266 INFO L125 PetriNetUnfolderBase]: For 173291/173355 co-relation queries the response was YES. [2024-10-24 12:33:39,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70974 conditions, 8548 events. 4901/8548 cut-off events. For 173291/173355 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 57511 event pairs, 385 based on Foata normal form. 123/8575 useless extension candidates. Maximal degree in co-relation 69875. Up to 1782 conditions per place. [2024-10-24 12:33:39,372 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 395 selfloop transitions, 843 changer transitions 1/1244 dead transitions. [2024-10-24 12:33:39,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1244 transitions, 28054 flow [2024-10-24 12:33:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-24 12:33:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-10-24 12:33:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 422 transitions. [2024-10-24 12:33:39,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-10-24 12:33:39,374 INFO L175 Difference]: Start difference. First operand has 280 places, 865 transitions, 18876 flow. Second operand 43 states and 422 transitions. [2024-10-24 12:33:39,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1244 transitions, 28054 flow [2024-10-24 12:33:40,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1244 transitions, 27128 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-10-24 12:33:40,884 INFO L231 Difference]: Finished difference. Result has 326 places, 1091 transitions, 26431 flow [2024-10-24 12:33:40,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=18083, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=26431, PETRI_PLACES=326, PETRI_TRANSITIONS=1091} [2024-10-24 12:33:40,885 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 302 predicate places. [2024-10-24 12:33:40,885 INFO L471 AbstractCegarLoop]: Abstraction has has 326 places, 1091 transitions, 26431 flow [2024-10-24 12:33:40,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2024-10-24 12:33:40,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:40,885 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:40,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-24 12:33:41,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-24 12:33:41,089 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:41,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:41,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1668580498, now seen corresponding path program 11 times [2024-10-24 12:33:41,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:41,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331700058] [2024-10-24 12:33:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:41,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:41,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:41,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331700058] [2024-10-24 12:33:41,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331700058] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:41,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629998877] [2024-10-24 12:33:41,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:33:41,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:41,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:41,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:41,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 12:33:41,225 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:33:41,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:41,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:41,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:41,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:41,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629998877] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:41,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:41,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-24 12:33:41,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072283448] [2024-10-24 12:33:41,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:41,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 12:33:41,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 12:33:41,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-24 12:33:41,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:41,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1091 transitions, 26431 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-10-24 12:33:41,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:41,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:41,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:44,137 INFO L124 PetriNetUnfolderBase]: 4961/8664 cut-off events. [2024-10-24 12:33:44,137 INFO L125 PetriNetUnfolderBase]: For 210186/210256 co-relation queries the response was YES. [2024-10-24 12:33:44,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77783 conditions, 8664 events. 4961/8664 cut-off events. For 210186/210256 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 58580 event pairs, 1714 based on Foata normal form. 48/8621 useless extension candidates. Maximal degree in co-relation 76564. Up to 6637 conditions per place. [2024-10-24 12:33:44,246 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 981 selfloop transitions, 177 changer transitions 4/1167 dead transitions. [2024-10-24 12:33:44,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 1167 transitions, 30031 flow [2024-10-24 12:33:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 12:33:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 12:33:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 114 transitions. [2024-10-24 12:33:44,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-10-24 12:33:44,250 INFO L175 Difference]: Start difference. First operand has 326 places, 1091 transitions, 26431 flow. Second operand 12 states and 114 transitions. [2024-10-24 12:33:44,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 1167 transitions, 30031 flow [2024-10-24 12:33:46,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1167 transitions, 29639 flow, removed 58 selfloop flow, removed 12 redundant places. [2024-10-24 12:33:46,493 INFO L231 Difference]: Finished difference. Result has 331 places, 1117 transitions, 27278 flow [2024-10-24 12:33:46,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=26047, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=27278, PETRI_PLACES=331, PETRI_TRANSITIONS=1117} [2024-10-24 12:33:46,495 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 307 predicate places. [2024-10-24 12:33:46,495 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 1117 transitions, 27278 flow [2024-10-24 12:33:46,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-10-24 12:33:46,495 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:46,495 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:46,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-24 12:33:46,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-24 12:33:46,699 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:46,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash -386093682, now seen corresponding path program 12 times [2024-10-24 12:33:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506833397] [2024-10-24 12:33:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:46,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:46,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506833397] [2024-10-24 12:33:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506833397] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:46,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295497422] [2024-10-24 12:33:46,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:33:46,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:46,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:46,867 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:46,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 12:33:46,905 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-24 12:33:46,905 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:46,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:46,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:46,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:47,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295497422] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:47,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:47,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-10-24 12:33:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426114420] [2024-10-24 12:33:47,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:47,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:33:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:33:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:33:47,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:47,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1117 transitions, 27278 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 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) [2024-10-24 12:33:47,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:47,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:47,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:52,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 12:33:55,353 INFO L124 PetriNetUnfolderBase]: 6505/11382 cut-off events. [2024-10-24 12:33:55,353 INFO L125 PetriNetUnfolderBase]: For 289095/289187 co-relation queries the response was YES. [2024-10-24 12:33:55,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103184 conditions, 11382 events. 6505/11382 cut-off events. For 289095/289187 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 80661 event pairs, 943 based on Foata normal form. 156/11423 useless extension candidates. Maximal degree in co-relation 102060. Up to 3724 conditions per place. [2024-10-24 12:33:55,562 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 880 selfloop transitions, 771 changer transitions 2/1658 dead transitions. [2024-10-24 12:33:55,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1658 transitions, 42134 flow [2024-10-24 12:33:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-24 12:33:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-24 12:33:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 381 transitions. [2024-10-24 12:33:55,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4557416267942584 [2024-10-24 12:33:55,565 INFO L175 Difference]: Start difference. First operand has 331 places, 1117 transitions, 27278 flow. Second operand 38 states and 381 transitions. [2024-10-24 12:33:55,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1658 transitions, 42134 flow [2024-10-24 12:33:59,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1658 transitions, 41941 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-10-24 12:33:59,393 INFO L231 Difference]: Finished difference. Result has 377 places, 1421 transitions, 37939 flow [2024-10-24 12:33:59,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=27003, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=37939, PETRI_PLACES=377, PETRI_TRANSITIONS=1421} [2024-10-24 12:33:59,395 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 353 predicate places. [2024-10-24 12:33:59,395 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 1421 transitions, 37939 flow [2024-10-24 12:33:59,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 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) [2024-10-24 12:33:59,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:59,395 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:33:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 12:33:59,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:59,596 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:33:59,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1833216398, now seen corresponding path program 13 times [2024-10-24 12:33:59,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:59,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979415486] [2024-10-24 12:33:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:59,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:59,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:59,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979415486] [2024-10-24 12:33:59,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979415486] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:59,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330328649] [2024-10-24 12:33:59,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:33:59,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:59,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:59,706 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:33:59,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 12:33:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:59,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:33:59,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:59,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330328649] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:59,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 12:33:59,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280138837] [2024-10-24 12:33:59,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:59,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:33:59,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:59,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:33:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:33:59,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:33:59,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1421 transitions, 37939 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2024-10-24 12:33:59,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:59,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:33:59,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:34:05,042 INFO L124 PetriNetUnfolderBase]: 7166/12498 cut-off events. [2024-10-24 12:34:05,043 INFO L125 PetriNetUnfolderBase]: For 375773/375875 co-relation queries the response was YES. [2024-10-24 12:34:05,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121490 conditions, 12498 events. 7166/12498 cut-off events. For 375773/375875 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 89975 event pairs, 941 based on Foata normal form. 97/12470 useless extension candidates. Maximal degree in co-relation 120461. Up to 4745 conditions per place. [2024-10-24 12:34:05,235 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 650 selfloop transitions, 971 changer transitions 7/1633 dead transitions. [2024-10-24 12:34:05,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1633 transitions, 45894 flow [2024-10-24 12:34:05,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 12:34:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-24 12:34:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 202 transitions. [2024-10-24 12:34:05,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-10-24 12:34:05,237 INFO L175 Difference]: Start difference. First operand has 377 places, 1421 transitions, 37939 flow. Second operand 20 states and 202 transitions. [2024-10-24 12:34:05,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1633 transitions, 45894 flow [2024-10-24 12:34:10,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1633 transitions, 45283 flow, removed 233 selfloop flow, removed 5 redundant places. [2024-10-24 12:34:10,087 INFO L231 Difference]: Finished difference. Result has 399 places, 1566 transitions, 44651 flow [2024-10-24 12:34:10,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=37286, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=836, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=44651, PETRI_PLACES=399, PETRI_TRANSITIONS=1566} [2024-10-24 12:34:10,088 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 375 predicate places. [2024-10-24 12:34:10,089 INFO L471 AbstractCegarLoop]: Abstraction has has 399 places, 1566 transitions, 44651 flow [2024-10-24 12:34:10,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2024-10-24 12:34:10,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:34:10,089 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:34:10,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-24 12:34:10,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:34:10,293 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:34:10,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:34:10,294 INFO L85 PathProgramCache]: Analyzing trace with hash 771047482, now seen corresponding path program 14 times [2024-10-24 12:34:10,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:34:10,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184335416] [2024-10-24 12:34:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:34:10,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:34:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:34:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:34:10,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:34:10,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184335416] [2024-10-24 12:34:10,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184335416] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:34:10,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112141422] [2024-10-24 12:34:10,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:34:10,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:34:10,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:34:10,369 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:34:10,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 12:34:10,408 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:34:10,409 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:34:10,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:34:10,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:34:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:34:10,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:34:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:34:10,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112141422] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:34:10,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:34:10,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 12:34:10,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543553839] [2024-10-24 12:34:10,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:34:10,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:34:10,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:34:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:34:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:34:10,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:34:10,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 1566 transitions, 44651 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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) [2024-10-24 12:34:10,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:34:10,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:34:10,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:34:17,091 INFO L124 PetriNetUnfolderBase]: 8959/15472 cut-off events. [2024-10-24 12:34:17,092 INFO L125 PetriNetUnfolderBase]: For 547552/547690 co-relation queries the response was YES. [2024-10-24 12:34:17,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158929 conditions, 15472 events. 8959/15472 cut-off events. For 547552/547690 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 113378 event pairs, 2139 based on Foata normal form. 86/15425 useless extension candidates. Maximal degree in co-relation 157773. Up to 9119 conditions per place. [2024-10-24 12:34:17,404 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 1182 selfloop transitions, 857 changer transitions 0/2044 dead transitions. [2024-10-24 12:34:17,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 2044 transitions, 61439 flow [2024-10-24 12:34:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 12:34:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-24 12:34:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 207 transitions. [2024-10-24 12:34:17,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-10-24 12:34:17,407 INFO L175 Difference]: Start difference. First operand has 399 places, 1566 transitions, 44651 flow. Second operand 20 states and 207 transitions. [2024-10-24 12:34:17,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 2044 transitions, 61439 flow [2024-10-24 12:34:24,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 2044 transitions, 60958 flow, removed 110 selfloop flow, removed 7 redundant places. [2024-10-24 12:34:24,665 INFO L231 Difference]: Finished difference. Result has 419 places, 1952 transitions, 58546 flow [2024-10-24 12:34:24,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=44190, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=58546, PETRI_PLACES=419, PETRI_TRANSITIONS=1952} [2024-10-24 12:34:24,667 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 395 predicate places. [2024-10-24 12:34:24,667 INFO L471 AbstractCegarLoop]: Abstraction has has 419 places, 1952 transitions, 58546 flow [2024-10-24 12:34:24,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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) [2024-10-24 12:34:24,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:34:24,667 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:34:24,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-24 12:34:24,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:34:24,869 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:34:24,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:34:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1312145248, now seen corresponding path program 15 times [2024-10-24 12:34:24,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:34:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726864347] [2024-10-24 12:34:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:34:24,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:34:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:34:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:34:24,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:34:24,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726864347] [2024-10-24 12:34:24,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726864347] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:34:24,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513628716] [2024-10-24 12:34:24,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:34:24,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:34:24,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:34:24,956 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:34:24,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 12:34:24,997 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:34:24,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:34:24,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:34:24,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:34:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:34:25,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:34:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:34:25,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513628716] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:34:25,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:34:25,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-24 12:34:25,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768629817] [2024-10-24 12:34:25,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:34:25,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:34:25,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:34:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:34:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:34:25,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:34:25,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1952 transitions, 58546 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 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) [2024-10-24 12:34:25,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:34:25,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:34:25,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:34:33,233 INFO L124 PetriNetUnfolderBase]: 8950/15459 cut-off events. [2024-10-24 12:34:33,234 INFO L125 PetriNetUnfolderBase]: For 591586/591712 co-relation queries the response was YES. [2024-10-24 12:34:33,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165458 conditions, 15459 events. 8950/15459 cut-off events. For 591586/591712 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 113570 event pairs, 2463 based on Foata normal form. 76/15382 useless extension candidates. Maximal degree in co-relation 165037. Up to 10308 conditions per place. [2024-10-24 12:34:33,507 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 1390 selfloop transitions, 600 changer transitions 3/1998 dead transitions. [2024-10-24 12:34:33,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 1998 transitions, 63123 flow [2024-10-24 12:34:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 12:34:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 12:34:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 140 transitions. [2024-10-24 12:34:33,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-10-24 12:34:33,511 INFO L175 Difference]: Start difference. First operand has 419 places, 1952 transitions, 58546 flow. Second operand 14 states and 140 transitions. [2024-10-24 12:34:33,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 1998 transitions, 63123 flow [2024-10-24 12:34:41,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1998 transitions, 62449 flow, removed 225 selfloop flow, removed 6 redundant places. [2024-10-24 12:34:41,875 INFO L231 Difference]: Finished difference. Result has 428 places, 1953 transitions, 59138 flow [2024-10-24 12:34:41,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=57837, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1950, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=59138, PETRI_PLACES=428, PETRI_TRANSITIONS=1953} [2024-10-24 12:34:41,878 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 404 predicate places. [2024-10-24 12:34:41,878 INFO L471 AbstractCegarLoop]: Abstraction has has 428 places, 1953 transitions, 59138 flow [2024-10-24 12:34:41,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 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) [2024-10-24 12:34:41,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:34:41,878 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:34:41,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-24 12:34:42,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-24 12:34:42,083 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:34:42,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:34:42,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1984276102, now seen corresponding path program 16 times [2024-10-24 12:34:42,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:34:42,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15104078] [2024-10-24 12:34:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:34:42,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:34:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:34:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:34:42,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:34:42,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15104078] [2024-10-24 12:34:42,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15104078] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:34:42,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892272959] [2024-10-24 12:34:42,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:34:42,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:34:42,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:34:42,277 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:34:42,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 12:34:42,316 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:34:42,316 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:34:42,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:34:42,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:34:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:34:42,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:34:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:34:42,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892272959] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:34:42,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:34:42,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 12:34:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181541336] [2024-10-24 12:34:42,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:34:42,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:34:42,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:34:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:34:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:34:42,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-24 12:34:42,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1953 transitions, 59138 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) [2024-10-24 12:34:42,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:34:42,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-24 12:34:42,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:34:48,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []