./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:36:34,559 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:36:34,608 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:36:34,612 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:36:34,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:36:34,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:36:34,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:36:34,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:36:34,632 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:36:34,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:36:34,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:36:34,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:36:34,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:36:34,634 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:36:34,634 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:36:34,634 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2025-03-08 17:36:34,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:36:34,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:36:34,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:36:34,865 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:36:34,865 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:36:34,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-08 17:36:36,033 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e44e61d2/06e8b66b23c646098041c7e61969fb91/FLAGceb3d4358 [2025-03-08 17:36:36,271 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:36:36,275 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-08 17:36:36,280 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e44e61d2/06e8b66b23c646098041c7e61969fb91/FLAGceb3d4358 [2025-03-08 17:36:36,318 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e44e61d2/06e8b66b23c646098041c7e61969fb91 [2025-03-08 17:36:36,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:36:36,323 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:36:36,325 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:36:36,325 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:36:36,328 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:36:36,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,330 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a12e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36, skipping insertion in model container [2025-03-08 17:36:36,330 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,343 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:36:36,466 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2025-03-08 17:36:36,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:36:36,478 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:36:36,491 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2025-03-08 17:36:36,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:36:36,501 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:36:36,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36 WrapperNode [2025-03-08 17:36:36,501 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:36:36,502 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:36:36,502 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:36:36,502 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:36:36,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,511 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,522 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2025-03-08 17:36:36,522 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:36:36,523 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:36:36,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:36:36,523 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:36:36,528 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,529 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,535 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]. [2025-03-08 17:36:36,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,540 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:36:36,544 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:36:36,544 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:36:36,544 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:36:36,545 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (1/1) ... [2025-03-08 17:36:36,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:36:36,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:36,568 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) [2025-03-08 17:36:36,571 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 [2025-03-08 17:36:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:36:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:36:36,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:36:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:36:36,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:36:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:36:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:36:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:36:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:36:36,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:36:36,588 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:36:36,646 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:36:36,648 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:36:36,795 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:36:36,795 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:36:36,903 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:36:36,903 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:36:36,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:36:36 BoogieIcfgContainer [2025-03-08 17:36:36,904 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:36:36,905 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:36:36,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:36:36,911 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:36:36,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:36:36" (1/3) ... [2025-03-08 17:36:36,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2510f9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:36:36, skipping insertion in model container [2025-03-08 17:36:36,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:36:36" (2/3) ... [2025-03-08 17:36:36,912 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2510f9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:36:36, skipping insertion in model container [2025-03-08 17:36:36,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:36:36" (3/3) ... [2025-03-08 17:36:36,914 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-08 17:36:36,925 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:36:36,927 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-nonblocking-counter-alt2.wvr.c that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 17:36:36,927 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:36:36,966 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:36:36,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2025-03-08 17:36:37,007 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2025-03-08 17:36:37,008 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:36:37,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-03-08 17:36:37,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2025-03-08 17:36:37,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2025-03-08 17:36:37,026 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:36:37,036 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;@150872c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:36:37,036 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:36:37,051 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:36:37,051 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-03-08 17:36:37,051 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:36:37,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:37,052 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:37,052 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:36:37,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:37,056 INFO L85 PathProgramCache]: Analyzing trace with hash -510011595, now seen corresponding path program 1 times [2025-03-08 17:36:37,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:37,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127793694] [2025-03-08 17:36:37,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:37,117 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 17:36:37,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 17:36:37,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:37,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:37,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:37,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127793694] [2025-03-08 17:36:37,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127793694] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:36:37,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:36:37,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:36:37,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424554918] [2025-03-08 17:36:37,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:37,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:36:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:37,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:36:37,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:36:37,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-03-08 17:36:37,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 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) [2025-03-08 17:36:37,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:37,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-03-08 17:36:37,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:37,462 INFO L124 PetriNetUnfolderBase]: 73/147 cut-off events. [2025-03-08 17:36:37,463 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-08 17:36:37,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 147 events. 73/147 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 438 event pairs, 22 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 255. Up to 74 conditions per place. [2025-03-08 17:36:37,466 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2025-03-08 17:36:37,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2025-03-08 17:36:37,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:36:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:36:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-03-08 17:36:37,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2025-03-08 17:36:37,476 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2025-03-08 17:36:37,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2025-03-08 17:36:37,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:36:37,483 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2025-03-08 17:36:37,485 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2025-03-08 17:36:37,487 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2025-03-08 17:36:37,487 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2025-03-08 17:36:37,488 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) [2025-03-08 17:36:37,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:37,488 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:37,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:36:37,489 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:36:37,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1628349778, now seen corresponding path program 1 times [2025-03-08 17:36:37,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:37,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170055575] [2025-03-08 17:36:37,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:37,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:37,497 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:36:37,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:36:37,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:37,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:37,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:37,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170055575] [2025-03-08 17:36:37,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170055575] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:36:37,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:36:37,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:36:37,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416871050] [2025-03-08 17:36:37,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:37,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:36:37,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:37,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:36:37,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:36:37,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:36:37,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2025-03-08 17:36:37,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:37,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:36:37,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:37,747 INFO L124 PetriNetUnfolderBase]: 173/302 cut-off events. [2025-03-08 17:36:37,747 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2025-03-08 17:36:37,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 302 events. 173/302 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 987 event pairs, 93 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 282. Up to 213 conditions per place. [2025-03-08 17:36:37,749 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 25 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2025-03-08 17:36:37,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 29 transitions, 134 flow [2025-03-08 17:36:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:36:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:36:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2025-03-08 17:36:37,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-03-08 17:36:37,750 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 39 transitions. [2025-03-08 17:36:37,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 29 transitions, 134 flow [2025-03-08 17:36:37,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:36:37,751 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2025-03-08 17:36:37,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2025-03-08 17:36:37,752 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2025-03-08 17:36:37,752 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2025-03-08 17:36:37,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2025-03-08 17:36:37,752 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:37,752 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:37,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:36:37,752 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:36:37,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1499780884, now seen corresponding path program 1 times [2025-03-08 17:36:37,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:37,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860537672] [2025-03-08 17:36:37,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:37,762 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:36:37,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:36:37,774 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:37,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:38,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:38,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860537672] [2025-03-08 17:36:38,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860537672] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:38,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877432416] [2025-03-08 17:36:38,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:38,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:38,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:38,069 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) [2025-03-08 17:36:38,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:36:38,106 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:36:38,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:36:38,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:38,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:38,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:36:38,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:38,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:38,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877432416] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:38,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:36:38,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 12 [2025-03-08 17:36:38,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596363375] [2025-03-08 17:36:38,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:38,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:36:38,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:38,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:36:38,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:36:38,437 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2025-03-08 17:36:38,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:38,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:38,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2025-03-08 17:36:38,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:38,545 INFO L124 PetriNetUnfolderBase]: 207/376 cut-off events. [2025-03-08 17:36:38,545 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2025-03-08 17:36:38,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 376 events. 207/376 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1406 event pairs, 55 based on Foata normal form. 1/331 useless extension candidates. Maximal degree in co-relation 261. Up to 156 conditions per place. [2025-03-08 17:36:38,549 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 36 selfloop transitions, 6 changer transitions 3/47 dead transitions. [2025-03-08 17:36:38,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 240 flow [2025-03-08 17:36:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:36:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:36:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2025-03-08 17:36:38,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2025-03-08 17:36:38,552 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 58 transitions. [2025-03-08 17:36:38,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 240 flow [2025-03-08 17:36:38,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:36:38,553 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 106 flow [2025-03-08 17:36:38,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2025-03-08 17:36:38,555 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2025-03-08 17:36:38,555 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 106 flow [2025-03-08 17:36:38,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:38,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:38,555 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:38,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:36:38,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:38,759 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:36:38,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1257977062, now seen corresponding path program 2 times [2025-03-08 17:36:38,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:38,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854479729] [2025-03-08 17:36:38,760 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:36:38,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:38,765 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:36:38,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:36:38,776 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:38,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:38,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:38,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854479729] [2025-03-08 17:36:38,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854479729] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:38,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263795157] [2025-03-08 17:36:38,928 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:36:38,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:38,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:38,930 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) [2025-03-08 17:36:38,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:36:38,957 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:36:38,971 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:36:38,971 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:38,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:38,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:36:38,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:39,034 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:36:39,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263795157] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:36:39,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:36:39,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2025-03-08 17:36:39,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173267229] [2025-03-08 17:36:39,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:39,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:36:39,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:39,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:36:39,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:36:39,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:36:39,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:39,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:39,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:36:39,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:39,153 INFO L124 PetriNetUnfolderBase]: 263/458 cut-off events. [2025-03-08 17:36:39,154 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2025-03-08 17:36:39,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 458 events. 263/458 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1622 event pairs, 81 based on Foata normal form. 6/430 useless extension candidates. Maximal degree in co-relation 437. Up to 380 conditions per place. [2025-03-08 17:36:39,156 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 36 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2025-03-08 17:36:39,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 260 flow [2025-03-08 17:36:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:36:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:36:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2025-03-08 17:36:39,157 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2025-03-08 17:36:39,157 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 106 flow. Second operand 6 states and 58 transitions. [2025-03-08 17:36:39,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 260 flow [2025-03-08 17:36:39,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-08 17:36:39,159 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 154 flow [2025-03-08 17:36:39,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2025-03-08 17:36:39,159 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 13 predicate places. [2025-03-08 17:36:39,159 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 154 flow [2025-03-08 17:36:39,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:39,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:39,160 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:39,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:36:39,364 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,SelfDestructingSolverStorable3 [2025-03-08 17:36:39,364 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:36:39,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1495270982, now seen corresponding path program 3 times [2025-03-08 17:36:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:39,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402866837] [2025-03-08 17:36:39,365 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:36:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:39,370 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:36:39,376 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:36:39,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:36:39,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:39,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:39,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402866837] [2025-03-08 17:36:39,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402866837] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:39,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352109637] [2025-03-08 17:36:39,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:36:39,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:39,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:39,530 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) [2025-03-08 17:36:39,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:36:39,557 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:36:39,567 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:36:39,567 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:36:39,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:39,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:36:39,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:36:39,627 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:36:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352109637] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:36:39,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:36:39,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2025-03-08 17:36:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799111592] [2025-03-08 17:36:39,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:36:39,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:36:39,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:39,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:36:39,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:36:39,633 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:36:39,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 154 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2025-03-08 17:36:39,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:39,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:36:39,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:39,759 INFO L124 PetriNetUnfolderBase]: 367/634 cut-off events. [2025-03-08 17:36:39,760 INFO L125 PetriNetUnfolderBase]: For 788/788 co-relation queries the response was YES. [2025-03-08 17:36:39,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 634 events. 367/634 cut-off events. For 788/788 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2463 event pairs, 92 based on Foata normal form. 18/652 useless extension candidates. Maximal degree in co-relation 1619. Up to 408 conditions per place. [2025-03-08 17:36:39,763 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 44 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2025-03-08 17:36:39,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 372 flow [2025-03-08 17:36:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:36:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:36:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2025-03-08 17:36:39,764 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2025-03-08 17:36:39,764 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 154 flow. Second operand 7 states and 66 transitions. [2025-03-08 17:36:39,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 372 flow [2025-03-08 17:36:39,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 361 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-08 17:36:39,770 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 212 flow [2025-03-08 17:36:39,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2025-03-08 17:36:39,771 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 19 predicate places. [2025-03-08 17:36:39,771 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 212 flow [2025-03-08 17:36:39,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2025-03-08 17:36:39,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:39,771 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:39,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:36:39,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:39,976 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:36:39,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:39,977 INFO L85 PathProgramCache]: Analyzing trace with hash -519403035, now seen corresponding path program 4 times [2025-03-08 17:36:39,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:39,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573569372] [2025-03-08 17:36:39,977 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:36:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:39,981 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:36:39,988 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:39,989 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:36:39,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:40,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:40,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573569372] [2025-03-08 17:36:40,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573569372] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:40,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372246461] [2025-03-08 17:36:40,193 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:36:40,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:40,195 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) [2025-03-08 17:36:40,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:36:40,220 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:36:40,231 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:40,232 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:36:40,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:40,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:36:40,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:40,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372246461] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:36:40,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:36:40,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2025-03-08 17:36:40,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212139521] [2025-03-08 17:36:40,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:36:40,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:36:40,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:40,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:36:40,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:36:40,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:36:40,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 212 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2025-03-08 17:36:40,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:40,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:36:40,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:41,379 INFO L124 PetriNetUnfolderBase]: 662/1103 cut-off events. [2025-03-08 17:36:41,380 INFO L125 PetriNetUnfolderBase]: For 1843/1843 co-relation queries the response was YES. [2025-03-08 17:36:41,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3508 conditions, 1103 events. 662/1103 cut-off events. For 1843/1843 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4673 event pairs, 0 based on Foata normal form. 33/1136 useless extension candidates. Maximal degree in co-relation 2907. Up to 205 conditions per place. [2025-03-08 17:36:41,386 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 91 selfloop transitions, 84 changer transitions 18/194 dead transitions. [2025-03-08 17:36:41,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 194 transitions, 1364 flow [2025-03-08 17:36:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 17:36:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-08 17:36:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 248 transitions. [2025-03-08 17:36:41,390 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2025-03-08 17:36:41,390 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 212 flow. Second operand 28 states and 248 transitions. [2025-03-08 17:36:41,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 194 transitions, 1364 flow [2025-03-08 17:36:41,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 194 transitions, 1335 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-08 17:36:41,397 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 975 flow [2025-03-08 17:36:41,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=975, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2025-03-08 17:36:41,398 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 58 predicate places. [2025-03-08 17:36:41,398 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 975 flow [2025-03-08 17:36:41,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2025-03-08 17:36:41,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:41,399 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:41,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 17:36:41,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:41,600 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:36:41,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1843655867, now seen corresponding path program 5 times [2025-03-08 17:36:41,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:41,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712918405] [2025-03-08 17:36:41,601 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:36:41,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:41,605 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:36:41,611 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:41,611 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:41,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:41,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:41,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712918405] [2025-03-08 17:36:41,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712918405] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:41,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930304529] [2025-03-08 17:36:41,765 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:36:41,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:41,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:41,769 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) [2025-03-08 17:36:41,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:36:41,798 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:36:41,808 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:36:41,808 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:36:41,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:41,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:36:41,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:41,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:46,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930304529] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:36:46,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:36:46,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-08 17:36:46,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919703660] [2025-03-08 17:36:46,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:36:46,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:36:46,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:36:46,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:36:46,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=199, Unknown=1, NotChecked=0, Total=272 [2025-03-08 17:36:51,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:36:51,085 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:36:51,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 975 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:51,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:36:51,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:36:51,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:55,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:37:01,487 INFO L124 PetriNetUnfolderBase]: 1035/1720 cut-off events. [2025-03-08 17:37:01,488 INFO L125 PetriNetUnfolderBase]: For 14627/14627 co-relation queries the response was YES. [2025-03-08 17:37:01,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9478 conditions, 1720 events. 1035/1720 cut-off events. For 14627/14627 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8207 event pairs, 97 based on Foata normal form. 8/1728 useless extension candidates. Maximal degree in co-relation 7769. Up to 505 conditions per place. [2025-03-08 17:37:01,505 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 127 selfloop transitions, 149 changer transitions 4/281 dead transitions. [2025-03-08 17:37:01,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 281 transitions, 3291 flow [2025-03-08 17:37:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:37:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:37:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 167 transitions. [2025-03-08 17:37:01,507 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41854636591478694 [2025-03-08 17:37:01,507 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 975 flow. Second operand 19 states and 167 transitions. [2025-03-08 17:37:01,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 281 transitions, 3291 flow [2025-03-08 17:37:01,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 281 transitions, 3037 flow, removed 113 selfloop flow, removed 8 redundant places. [2025-03-08 17:37:01,549 INFO L231 Difference]: Finished difference. Result has 100 places, 212 transitions, 2637 flow [2025-03-08 17:37:01,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2637, PETRI_PLACES=100, PETRI_TRANSITIONS=212} [2025-03-08 17:37:01,552 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 77 predicate places. [2025-03-08 17:37:01,552 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 212 transitions, 2637 flow [2025-03-08 17:37:01,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2025-03-08 17:37:01,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:01,552 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:01,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:37:01,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:01,753 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:01,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:01,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1423889039, now seen corresponding path program 6 times [2025-03-08 17:37:01,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:01,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365731881] [2025-03-08 17:37:01,754 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:37:01,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:01,758 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:01,767 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:01,767 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:37:01,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:01,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:01,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365731881] [2025-03-08 17:37:01,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365731881] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:01,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87550589] [2025-03-08 17:37:01,919 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:37:01,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:01,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:01,921 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) [2025-03-08 17:37:01,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:37:01,950 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:01,960 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:01,960 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:37:01,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:01,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:37:01,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:02,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:02,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87550589] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:02,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:02,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2025-03-08 17:37:02,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100969924] [2025-03-08 17:37:02,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:02,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:37:02,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:02,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:37:02,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:37:02,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:02,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 212 transitions, 2637 flow. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 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) [2025-03-08 17:37:02,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:02,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:02,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:03,593 INFO L124 PetriNetUnfolderBase]: 1303/2156 cut-off events. [2025-03-08 17:37:03,593 INFO L125 PetriNetUnfolderBase]: For 29222/29222 co-relation queries the response was YES. [2025-03-08 17:37:03,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13755 conditions, 2156 events. 1303/2156 cut-off events. For 29222/29222 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10780 event pairs, 45 based on Foata normal form. 48/2204 useless extension candidates. Maximal degree in co-relation 11719. Up to 426 conditions per place. [2025-03-08 17:37:03,612 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 146 selfloop transitions, 272 changer transitions 2/421 dead transitions. [2025-03-08 17:37:03,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 421 transitions, 5760 flow [2025-03-08 17:37:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-08 17:37:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-03-08 17:37:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 292 transitions. [2025-03-08 17:37:03,613 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4213564213564214 [2025-03-08 17:37:03,613 INFO L175 Difference]: Start difference. First operand has 100 places, 212 transitions, 2637 flow. Second operand 33 states and 292 transitions. [2025-03-08 17:37:03,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 421 transitions, 5760 flow [2025-03-08 17:37:03,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 421 transitions, 5496 flow, removed 132 selfloop flow, removed 1 redundant places. [2025-03-08 17:37:03,676 INFO L231 Difference]: Finished difference. Result has 149 places, 313 transitions, 4754 flow [2025-03-08 17:37:03,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2529, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4754, PETRI_PLACES=149, PETRI_TRANSITIONS=313} [2025-03-08 17:37:03,677 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 126 predicate places. [2025-03-08 17:37:03,677 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 313 transitions, 4754 flow [2025-03-08 17:37:03,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 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) [2025-03-08 17:37:03,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:03,678 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:03,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 17:37:03,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:03,882 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:03,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:03,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1893128623, now seen corresponding path program 7 times [2025-03-08 17:37:03,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:03,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48867810] [2025-03-08 17:37:03,883 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:37:03,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:03,886 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:37:03,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:03,890 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:03,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:04,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:04,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48867810] [2025-03-08 17:37:04,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48867810] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:04,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928868805] [2025-03-08 17:37:04,006 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:37:04,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:04,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:04,008 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) [2025-03-08 17:37:04,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:37:04,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:37:04,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:04,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:04,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:04,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:37:04,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:04,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:04,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928868805] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:04,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:04,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:37:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037818879] [2025-03-08 17:37:04,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:04,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:37:04,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:04,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:37:04,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:37:04,317 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:04,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 313 transitions, 4754 flow. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 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) [2025-03-08 17:37:04,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:04,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:04,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:05,518 INFO L124 PetriNetUnfolderBase]: 1873/3143 cut-off events. [2025-03-08 17:37:05,518 INFO L125 PetriNetUnfolderBase]: For 69761/69761 co-relation queries the response was YES. [2025-03-08 17:37:05,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23046 conditions, 3143 events. 1873/3143 cut-off events. For 69761/69761 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17416 event pairs, 57 based on Foata normal form. 54/3197 useless extension candidates. Maximal degree in co-relation 20187. Up to 585 conditions per place. [2025-03-08 17:37:05,547 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 196 selfloop transitions, 434 changer transitions 2/633 dead transitions. [2025-03-08 17:37:05,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 633 transitions, 10334 flow [2025-03-08 17:37:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-08 17:37:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-03-08 17:37:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 294 transitions. [2025-03-08 17:37:05,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-03-08 17:37:05,549 INFO L175 Difference]: Start difference. First operand has 149 places, 313 transitions, 4754 flow. Second operand 32 states and 294 transitions. [2025-03-08 17:37:05,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 633 transitions, 10334 flow [2025-03-08 17:37:05,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 633 transitions, 9899 flow, removed 189 selfloop flow, removed 7 redundant places. [2025-03-08 17:37:05,746 INFO L231 Difference]: Finished difference. Result has 194 places, 512 transitions, 9207 flow [2025-03-08 17:37:05,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4487, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9207, PETRI_PLACES=194, PETRI_TRANSITIONS=512} [2025-03-08 17:37:05,746 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 171 predicate places. [2025-03-08 17:37:05,746 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 512 transitions, 9207 flow [2025-03-08 17:37:05,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 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) [2025-03-08 17:37:05,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:05,747 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:05,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 17:37:05,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:05,947 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:05,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash -16998021, now seen corresponding path program 8 times [2025-03-08 17:37:05,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:05,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205741200] [2025-03-08 17:37:05,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:05,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:05,950 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:05,954 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:05,954 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:05,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:06,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:06,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205741200] [2025-03-08 17:37:06,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205741200] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:06,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470906242] [2025-03-08 17:37:06,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:06,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:06,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:06,072 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) [2025-03-08 17:37:06,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:37:06,094 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:06,103 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:06,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:06,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:06,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:37:06,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:06,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:06,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470906242] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:06,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:06,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2025-03-08 17:37:06,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313726955] [2025-03-08 17:37:06,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:06,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 17:37:06,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:06,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 17:37:06,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:37:06,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:06,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 512 transitions, 9207 flow. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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) [2025-03-08 17:37:06,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:06,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:06,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:07,313 INFO L124 PetriNetUnfolderBase]: 2018/3381 cut-off events. [2025-03-08 17:37:07,313 INFO L125 PetriNetUnfolderBase]: For 85278/85278 co-relation queries the response was YES. [2025-03-08 17:37:07,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28835 conditions, 3381 events. 2018/3381 cut-off events. For 85278/85278 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19048 event pairs, 106 based on Foata normal form. 6/3387 useless extension candidates. Maximal degree in co-relation 24982. Up to 657 conditions per place. [2025-03-08 17:37:07,347 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 194 selfloop transitions, 435 changer transitions 5/635 dead transitions. [2025-03-08 17:37:07,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 635 transitions, 12425 flow [2025-03-08 17:37:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 17:37:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-08 17:37:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 202 transitions. [2025-03-08 17:37:07,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43722943722943725 [2025-03-08 17:37:07,348 INFO L175 Difference]: Start difference. First operand has 194 places, 512 transitions, 9207 flow. Second operand 22 states and 202 transitions. [2025-03-08 17:37:07,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 635 transitions, 12425 flow [2025-03-08 17:37:07,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 635 transitions, 12053 flow, removed 186 selfloop flow, removed 0 redundant places. [2025-03-08 17:37:07,768 INFO L231 Difference]: Finished difference. Result has 223 places, 556 transitions, 11263 flow [2025-03-08 17:37:07,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8921, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11263, PETRI_PLACES=223, PETRI_TRANSITIONS=556} [2025-03-08 17:37:07,769 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 200 predicate places. [2025-03-08 17:37:07,769 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 556 transitions, 11263 flow [2025-03-08 17:37:07,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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) [2025-03-08 17:37:07,769 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:07,769 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:07,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 17:37:07,969 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,SelfDestructingSolverStorable9 [2025-03-08 17:37:07,969 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:07,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:07,970 INFO L85 PathProgramCache]: Analyzing trace with hash 7289019, now seen corresponding path program 9 times [2025-03-08 17:37:07,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:07,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164556957] [2025-03-08 17:37:07,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:07,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:07,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:07,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:07,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:07,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:08,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164556957] [2025-03-08 17:37:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164556957] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651776900] [2025-03-08 17:37:08,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:08,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:08,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:08,194 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) [2025-03-08 17:37:08,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:37:08,216 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:08,224 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:08,224 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:08,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:08,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:37:08,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:08,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651776900] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:08,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-03-08 17:37:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790495114] [2025-03-08 17:37:08,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:08,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:37:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:08,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:37:08,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:37:08,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:08,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 556 transitions, 11263 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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) [2025-03-08 17:37:08,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:08,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:08,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:09,908 INFO L124 PetriNetUnfolderBase]: 2483/4184 cut-off events. [2025-03-08 17:37:09,908 INFO L125 PetriNetUnfolderBase]: For 137485/137485 co-relation queries the response was YES. [2025-03-08 17:37:09,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38326 conditions, 4184 events. 2483/4184 cut-off events. For 137485/137485 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 24710 event pairs, 73 based on Foata normal form. 40/4224 useless extension candidates. Maximal degree in co-relation 38104. Up to 781 conditions per place. [2025-03-08 17:37:09,945 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 165 selfloop transitions, 688 changer transitions 1/855 dead transitions. [2025-03-08 17:37:09,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 855 transitions, 18542 flow [2025-03-08 17:37:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-08 17:37:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-03-08 17:37:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 249 transitions. [2025-03-08 17:37:09,947 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4088669950738916 [2025-03-08 17:37:09,947 INFO L175 Difference]: Start difference. First operand has 223 places, 556 transitions, 11263 flow. Second operand 29 states and 249 transitions. [2025-03-08 17:37:09,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 855 transitions, 18542 flow [2025-03-08 17:37:10,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 855 transitions, 18344 flow, removed 71 selfloop flow, removed 6 redundant places. [2025-03-08 17:37:10,657 INFO L231 Difference]: Finished difference. Result has 259 places, 753 transitions, 18032 flow [2025-03-08 17:37:10,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11148, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=499, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=18032, PETRI_PLACES=259, PETRI_TRANSITIONS=753} [2025-03-08 17:37:10,658 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 236 predicate places. [2025-03-08 17:37:10,658 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 753 transitions, 18032 flow [2025-03-08 17:37:10,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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) [2025-03-08 17:37:10,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:10,658 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:10,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 17:37:10,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:10,859 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:10,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash -529320965, now seen corresponding path program 10 times [2025-03-08 17:37:10,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:10,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419414657] [2025-03-08 17:37:10,860 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:10,862 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:10,866 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:10,866 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:10,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:11,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:11,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419414657] [2025-03-08 17:37:11,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419414657] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:11,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996075456] [2025-03-08 17:37:11,011 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:11,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:11,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:11,014 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) [2025-03-08 17:37:11,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:37:11,037 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:11,046 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:11,047 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:11,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:11,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:37:11,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:11,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:11,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996075456] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:11,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:11,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2025-03-08 17:37:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962260062] [2025-03-08 17:37:11,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:11,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:37:11,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:11,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:37:11,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:37:11,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:11,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 753 transitions, 18032 flow. Second operand has 20 states, 20 states have (on average 5.65) internal successors, (113), 20 states have internal predecessors, (113), 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) [2025-03-08 17:37:11,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:11,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:11,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:13,811 INFO L124 PetriNetUnfolderBase]: 3377/5668 cut-off events. [2025-03-08 17:37:13,811 INFO L125 PetriNetUnfolderBase]: For 284022/284022 co-relation queries the response was YES. [2025-03-08 17:37:13,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59085 conditions, 5668 events. 3377/5668 cut-off events. For 284022/284022 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 34973 event pairs, 84 based on Foata normal form. 130/5798 useless extension candidates. Maximal degree in co-relation 58379. Up to 1049 conditions per place. [2025-03-08 17:37:13,860 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 393 selfloop transitions, 903 changer transitions 12/1309 dead transitions. [2025-03-08 17:37:13,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1309 transitions, 33321 flow [2025-03-08 17:37:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-08 17:37:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-03-08 17:37:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 328 transitions. [2025-03-08 17:37:13,862 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2025-03-08 17:37:13,862 INFO L175 Difference]: Start difference. First operand has 259 places, 753 transitions, 18032 flow. Second operand 38 states and 328 transitions. [2025-03-08 17:37:13,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1309 transitions, 33321 flow [2025-03-08 17:37:15,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1309 transitions, 32691 flow, removed 289 selfloop flow, removed 5 redundant places. [2025-03-08 17:37:15,555 INFO L231 Difference]: Finished difference. Result has 316 places, 1106 transitions, 30417 flow [2025-03-08 17:37:15,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=17432, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=30417, PETRI_PLACES=316, PETRI_TRANSITIONS=1106} [2025-03-08 17:37:15,556 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 293 predicate places. [2025-03-08 17:37:15,556 INFO L471 AbstractCegarLoop]: Abstraction has has 316 places, 1106 transitions, 30417 flow [2025-03-08 17:37:15,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.65) internal successors, (113), 20 states have internal predecessors, (113), 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) [2025-03-08 17:37:15,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:15,556 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:15,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 17:37:15,757 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,SelfDestructingSolverStorable11 [2025-03-08 17:37:15,757 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:15,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash -439483747, now seen corresponding path program 11 times [2025-03-08 17:37:15,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:15,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82480262] [2025-03-08 17:37:15,762 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:37:15,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:15,764 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:15,768 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:15,768 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:15,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:15,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:15,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82480262] [2025-03-08 17:37:15,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82480262] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:15,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088466198] [2025-03-08 17:37:15,894 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:37:15,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:15,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:15,897 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) [2025-03-08 17:37:15,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:37:15,927 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:15,936 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:15,936 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:15,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:15,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:37:15,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:16,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:16,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088466198] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:16,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:16,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-08 17:37:16,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680198316] [2025-03-08 17:37:16,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:16,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:37:16,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:16,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:37:16,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:37:16,156 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:16,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 1106 transitions, 30417 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2025-03-08 17:37:16,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:16,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:16,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:21,605 INFO L124 PetriNetUnfolderBase]: 3932/6497 cut-off events. [2025-03-08 17:37:21,605 INFO L125 PetriNetUnfolderBase]: For 393827/393827 co-relation queries the response was YES. [2025-03-08 17:37:21,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78536 conditions, 6497 events. 3932/6497 cut-off events. For 393827/393827 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 40035 event pairs, 300 based on Foata normal form. 22/6519 useless extension candidates. Maximal degree in co-relation 78098. Up to 1501 conditions per place. [2025-03-08 17:37:21,680 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 332 selfloop transitions, 1079 changer transitions 7/1419 dead transitions. [2025-03-08 17:37:21,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1419 transitions, 41524 flow [2025-03-08 17:37:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 17:37:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-08 17:37:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 199 transitions. [2025-03-08 17:37:21,682 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2025-03-08 17:37:21,682 INFO L175 Difference]: Start difference. First operand has 316 places, 1106 transitions, 30417 flow. Second operand 22 states and 199 transitions. [2025-03-08 17:37:21,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1419 transitions, 41524 flow [2025-03-08 17:37:24,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1419 transitions, 40504 flow, removed 479 selfloop flow, removed 7 redundant places. [2025-03-08 17:37:24,812 INFO L231 Difference]: Finished difference. Result has 336 places, 1305 transitions, 39975 flow [2025-03-08 17:37:24,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=29511, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=881, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=39975, PETRI_PLACES=336, PETRI_TRANSITIONS=1305} [2025-03-08 17:37:24,813 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 313 predicate places. [2025-03-08 17:37:24,814 INFO L471 AbstractCegarLoop]: Abstraction has has 336 places, 1305 transitions, 39975 flow [2025-03-08 17:37:24,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2025-03-08 17:37:24,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:24,814 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:24,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 17:37:25,014 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,SelfDestructingSolverStorable12 [2025-03-08 17:37:25,015 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:25,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2028000903, now seen corresponding path program 12 times [2025-03-08 17:37:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277977011] [2025-03-08 17:37:25,015 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:37:25,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:25,018 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:25,022 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:25,022 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:37:25,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:25,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:25,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277977011] [2025-03-08 17:37:25,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277977011] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:25,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620331376] [2025-03-08 17:37:25,136 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:37:25,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:25,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:25,138 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) [2025-03-08 17:37:25,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:37:25,163 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:25,172 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:25,172 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:37:25,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:25,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:37:25,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:25,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:25,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620331376] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:25,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:25,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2025-03-08 17:37:25,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138409844] [2025-03-08 17:37:25,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:25,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:37:25,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:25,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:37:25,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:37:25,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:25,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1305 transitions, 39975 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 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) [2025-03-08 17:37:25,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:25,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:25,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:27,985 INFO L124 PetriNetUnfolderBase]: 4082/6699 cut-off events. [2025-03-08 17:37:27,986 INFO L125 PetriNetUnfolderBase]: For 446481/446481 co-relation queries the response was YES. [2025-03-08 17:37:28,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86893 conditions, 6699 events. 4082/6699 cut-off events. For 446481/446481 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40943 event pairs, 294 based on Foata normal form. 12/6711 useless extension candidates. Maximal degree in co-relation 85010. Up to 1550 conditions per place. [2025-03-08 17:37:28,083 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 327 selfloop transitions, 1139 changer transitions 4/1471 dead transitions. [2025-03-08 17:37:28,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1471 transitions, 46910 flow [2025-03-08 17:37:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 17:37:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-08 17:37:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 194 transitions. [2025-03-08 17:37:28,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2025-03-08 17:37:28,085 INFO L175 Difference]: Start difference. First operand has 336 places, 1305 transitions, 39975 flow. Second operand 22 states and 194 transitions. [2025-03-08 17:37:28,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1471 transitions, 46910 flow [2025-03-08 17:37:32,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1471 transitions, 46034 flow, removed 396 selfloop flow, removed 6 redundant places. [2025-03-08 17:37:32,853 INFO L231 Difference]: Finished difference. Result has 354 places, 1390 transitions, 46191 flow [2025-03-08 17:37:32,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=39159, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=46191, PETRI_PLACES=354, PETRI_TRANSITIONS=1390} [2025-03-08 17:37:32,854 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 331 predicate places. [2025-03-08 17:37:32,854 INFO L471 AbstractCegarLoop]: Abstraction has has 354 places, 1390 transitions, 46191 flow [2025-03-08 17:37:32,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 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) [2025-03-08 17:37:32,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:32,855 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:32,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 17:37:33,055 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,SelfDestructingSolverStorable13 [2025-03-08 17:37:33,055 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:33,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1886100741, now seen corresponding path program 13 times [2025-03-08 17:37:33,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:33,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627961836] [2025-03-08 17:37:33,056 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:37:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:33,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:37:33,061 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:33,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:33,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:33,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:33,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627961836] [2025-03-08 17:37:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627961836] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:37:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692657901] [2025-03-08 17:37:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:33,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:37:33,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:33,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:37:33,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:37:33,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:33,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1390 transitions, 46191 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 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) [2025-03-08 17:37:33,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:33,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:33,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:35,574 INFO L124 PetriNetUnfolderBase]: 4101/6736 cut-off events. [2025-03-08 17:37:35,575 INFO L125 PetriNetUnfolderBase]: For 354573/354573 co-relation queries the response was YES. [2025-03-08 17:37:35,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90313 conditions, 6736 events. 4101/6736 cut-off events. For 354573/354573 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 41093 event pairs, 1165 based on Foata normal form. 2/6738 useless extension candidates. Maximal degree in co-relation 88296. Up to 5735 conditions per place. [2025-03-08 17:37:35,658 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1289 selfloop transitions, 129 changer transitions 4/1423 dead transitions. [2025-03-08 17:37:35,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1423 transitions, 49609 flow [2025-03-08 17:37:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:37:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:37:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 67 transitions. [2025-03-08 17:37:35,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2025-03-08 17:37:35,660 INFO L175 Difference]: Start difference. First operand has 354 places, 1390 transitions, 46191 flow. Second operand 8 states and 67 transitions. [2025-03-08 17:37:35,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1423 transitions, 49609 flow [2025-03-08 17:37:40,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1423 transitions, 48947 flow, removed 288 selfloop flow, removed 7 redundant places. [2025-03-08 17:37:40,664 INFO L231 Difference]: Finished difference. Result has 355 places, 1396 transitions, 45963 flow [2025-03-08 17:37:40,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=45535, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=45963, PETRI_PLACES=355, PETRI_TRANSITIONS=1396} [2025-03-08 17:37:40,666 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 332 predicate places. [2025-03-08 17:37:40,666 INFO L471 AbstractCegarLoop]: Abstraction has has 355 places, 1396 transitions, 45963 flow [2025-03-08 17:37:40,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 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) [2025-03-08 17:37:40,666 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:40,666 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:40,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-08 17:37:40,666 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:40,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash -29307859, now seen corresponding path program 14 times [2025-03-08 17:37:40,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:40,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085232941] [2025-03-08 17:37:40,667 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:40,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:40,670 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:40,675 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:40,675 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:40,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:40,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:40,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085232941] [2025-03-08 17:37:40,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085232941] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:40,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185188058] [2025-03-08 17:37:40,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:40,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:40,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:40,802 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) [2025-03-08 17:37:40,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:37:40,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:40,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:40,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:40,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:40,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:37:40,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:40,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:41,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185188058] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:41,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:41,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2025-03-08 17:37:41,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657198120] [2025-03-08 17:37:41,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:41,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:37:41,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:41,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:37:41,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:37:41,097 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:41,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1396 transitions, 45963 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 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) [2025-03-08 17:37:41,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:41,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:41,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:44,506 INFO L124 PetriNetUnfolderBase]: 4926/8177 cut-off events. [2025-03-08 17:37:44,506 INFO L125 PetriNetUnfolderBase]: For 435989/435989 co-relation queries the response was YES. [2025-03-08 17:37:44,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108525 conditions, 8177 events. 4926/8177 cut-off events. For 435989/435989 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52609 event pairs, 675 based on Foata normal form. 56/8233 useless extension candidates. Maximal degree in co-relation 106598. Up to 3215 conditions per place. [2025-03-08 17:37:44,778 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 997 selfloop transitions, 831 changer transitions 0/1829 dead transitions. [2025-03-08 17:37:44,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1829 transitions, 62104 flow [2025-03-08 17:37:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:37:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:37:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 217 transitions. [2025-03-08 17:37:44,779 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2025-03-08 17:37:44,779 INFO L175 Difference]: Start difference. First operand has 355 places, 1396 transitions, 45963 flow. Second operand 25 states and 217 transitions. [2025-03-08 17:37:44,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1829 transitions, 62104 flow [2025-03-08 17:37:51,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1829 transitions, 61826 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-03-08 17:37:51,543 INFO L231 Difference]: Finished difference. Result has 385 places, 1603 transitions, 56119 flow [2025-03-08 17:37:51,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=45721, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=639, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=56119, PETRI_PLACES=385, PETRI_TRANSITIONS=1603} [2025-03-08 17:37:51,545 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 362 predicate places. [2025-03-08 17:37:51,545 INFO L471 AbstractCegarLoop]: Abstraction has has 385 places, 1603 transitions, 56119 flow [2025-03-08 17:37:51,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 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) [2025-03-08 17:37:51,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:51,545 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:51,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 17:37:51,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 17:37:51,749 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:51,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1584250517, now seen corresponding path program 15 times [2025-03-08 17:37:51,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:51,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273361698] [2025-03-08 17:37:51,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:51,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:51,752 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:37:51,755 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:51,755 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:37:51,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:51,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:51,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273361698] [2025-03-08 17:37:51,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273361698] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:51,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:51,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:37:51,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458133993] [2025-03-08 17:37:51,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:51,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:37:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:51,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:37:51,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:37:51,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:51,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1603 transitions, 56119 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 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) [2025-03-08 17:37:51,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:51,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:51,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:55,214 INFO L124 PetriNetUnfolderBase]: 4967/8248 cut-off events. [2025-03-08 17:37:55,215 INFO L125 PetriNetUnfolderBase]: For 469258/469258 co-relation queries the response was YES. [2025-03-08 17:37:55,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115361 conditions, 8248 events. 4967/8248 cut-off events. For 469258/469258 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 53260 event pairs, 1459 based on Foata normal form. 4/8252 useless extension candidates. Maximal degree in co-relation 113331. Up to 7107 conditions per place. [2025-03-08 17:37:55,322 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 1482 selfloop transitions, 160 changer transitions 0/1643 dead transitions. [2025-03-08 17:37:55,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1643 transitions, 60327 flow [2025-03-08 17:37:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:37:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:37:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 80 transitions. [2025-03-08 17:37:55,323 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2025-03-08 17:37:55,323 INFO L175 Difference]: Start difference. First operand has 385 places, 1603 transitions, 56119 flow. Second operand 9 states and 80 transitions. [2025-03-08 17:37:55,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1643 transitions, 60327 flow [2025-03-08 17:38:02,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1643 transitions, 59309 flow, removed 204 selfloop flow, removed 6 redundant places. [2025-03-08 17:38:02,846 INFO L231 Difference]: Finished difference. Result has 390 places, 1618 transitions, 56010 flow [2025-03-08 17:38:02,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=55112, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=56010, PETRI_PLACES=390, PETRI_TRANSITIONS=1618} [2025-03-08 17:38:02,848 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 367 predicate places. [2025-03-08 17:38:02,848 INFO L471 AbstractCegarLoop]: Abstraction has has 390 places, 1618 transitions, 56010 flow [2025-03-08 17:38:02,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 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) [2025-03-08 17:38:02,848 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:02,848 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:38:02,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-08 17:38:02,848 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:38:02,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:02,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1925304249, now seen corresponding path program 16 times [2025-03-08 17:38:02,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:02,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807934571] [2025-03-08 17:38:02,849 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:38:02,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:02,853 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:38:02,874 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:02,874 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:38:02,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:03,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807934571] [2025-03-08 17:38:03,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807934571] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521107980] [2025-03-08 17:38:03,328 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:38:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:03,330 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) [2025-03-08 17:38:03,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:38:03,380 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:38:03,389 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:03,389 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:38:03,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:03,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:38:03,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:03,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:03,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521107980] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:03,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:03,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 25 [2025-03-08 17:38:03,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737583683] [2025-03-08 17:38:03,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:03,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 17:38:03,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:03,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 17:38:03,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2025-03-08 17:38:03,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:38:03,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 1618 transitions, 56010 flow. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 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) [2025-03-08 17:38:03,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:03,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:38:03,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:10,138 INFO L124 PetriNetUnfolderBase]: 5503/9118 cut-off events. [2025-03-08 17:38:10,138 INFO L125 PetriNetUnfolderBase]: For 540905/540905 co-relation queries the response was YES. [2025-03-08 17:38:10,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128361 conditions, 9118 events. 5503/9118 cut-off events. For 540905/540905 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59847 event pairs, 37 based on Foata normal form. 31/9149 useless extension candidates. Maximal degree in co-relation 126364. Up to 2756 conditions per place. [2025-03-08 17:38:10,262 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 488 selfloop transitions, 1686 changer transitions 9/2184 dead transitions. [2025-03-08 17:38:10,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 2184 transitions, 78711 flow [2025-03-08 17:38:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-08 17:38:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2025-03-08 17:38:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 312 transitions. [2025-03-08 17:38:10,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2025-03-08 17:38:10,263 INFO L175 Difference]: Start difference. First operand has 390 places, 1618 transitions, 56010 flow. Second operand 40 states and 312 transitions. [2025-03-08 17:38:10,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 2184 transitions, 78711 flow