./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 735b3cc8 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-?-735b3cc-m [2025-03-14 01:08:02,238 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 01:08:02,288 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 01:08:02,292 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 01:08:02,292 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 01:08:02,313 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 01:08:02,314 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 01:08:02,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 01:08:02,314 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 01:08:02,314 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 01:08:02,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 01:08:02,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 01:08:02,316 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 01:08:02,316 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 01:08:02,316 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 01:08:02,316 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 01:08:02,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 01:08:02,316 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 01:08:02,316 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 01:08:02,316 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 01:08:02,316 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 01:08:02,316 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 01:08:02,316 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 01:08:02,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 01:08:02,317 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 01:08:02,317 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 01:08:02,317 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 01:08:02,317 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 01:08:02,317 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 01:08:02,317 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 01:08:02,317 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 01:08:02,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 01:08:02,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:08:02,318 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 01:08:02,318 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 01:08:02,318 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 01:08:02,318 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 01:08:02,318 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 01:08:02,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 01:08:02,318 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 01:08:02,318 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 01:08:02,318 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 01:08:02,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 01:08:02,319 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 [2025-03-14 01:08:02,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 01:08:02,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 01:08:02,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 01:08:02,554 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 01:08:02,554 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 01:08:02,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-14 01:08:03,685 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6466554a8/a40b86075971402f80b865d389ac8a25/FLAG9fa46bc89 [2025-03-14 01:08:03,877 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 01:08:03,878 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-14 01:08:03,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6466554a8/a40b86075971402f80b865d389ac8a25/FLAG9fa46bc89 [2025-03-14 01:08:04,242 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6466554a8/a40b86075971402f80b865d389ac8a25 [2025-03-14 01:08:04,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 01:08:04,245 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 01:08:04,246 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 01:08:04,246 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 01:08:04,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 01:08:04,249 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30eec23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04, skipping insertion in model container [2025-03-14 01:08:04,250 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,261 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 01:08:04,382 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] [2025-03-14 01:08:04,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:08:04,392 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 01:08:04,405 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] [2025-03-14 01:08:04,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:08:04,419 INFO L204 MainTranslator]: Completed translation [2025-03-14 01:08:04,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04 WrapperNode [2025-03-14 01:08:04,420 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 01:08:04,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 01:08:04,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 01:08:04,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 01:08:04,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,443 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2025-03-14 01:08:04,443 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 01:08:04,444 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 01:08:04,444 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 01:08:04,444 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 01:08:04,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,453 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,462 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]. [2025-03-14 01:08:04,463 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,467 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,471 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,472 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,472 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,473 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 01:08:04,473 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 01:08:04,473 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 01:08:04,473 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 01:08:04,476 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (1/1) ... [2025-03-14 01:08:04,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:08:04,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:04,502 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) [2025-03-14 01:08:04,504 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 [2025-03-14 01:08:04,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 01:08:04,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-14 01:08:04,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-14 01:08:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-14 01:08:04,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-14 01:08:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 01:08:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-14 01:08:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-14 01:08:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 01:08:04,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 01:08:04,522 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 01:08:04,578 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 01:08:04,579 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 01:08:04,697 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 01:08:04,698 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 01:08:04,698 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 01:08:04,784 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 01:08:04,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:08:04 BoogieIcfgContainer [2025-03-14 01:08:04,785 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 01:08:04,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 01:08:04,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 01:08:04,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 01:08:04,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 01:08:04" (1/3) ... [2025-03-14 01:08:04,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b15a400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:08:04, skipping insertion in model container [2025-03-14 01:08:04,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:08:04" (2/3) ... [2025-03-14 01:08:04,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b15a400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:08:04, skipping insertion in model container [2025-03-14 01:08:04,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:08:04" (3/3) ... [2025-03-14 01:08:04,792 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-14 01:08:04,802 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 01:08:04,803 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. [2025-03-14 01:08:04,803 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 01:08:04,839 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-14 01:08:04,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2025-03-14 01:08:04,889 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2025-03-14 01:08:04,890 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-14 01:08:04,894 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. [2025-03-14 01:08:04,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2025-03-14 01:08:04,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2025-03-14 01:08:04,908 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 01:08:04,917 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;@796735ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 01:08:04,917 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-14 01:08:04,925 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 01:08:04,925 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-03-14 01:08:04,925 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-14 01:08:04,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:04,926 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:04,926 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:04,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash -510011595, now seen corresponding path program 1 times [2025-03-14 01:08:04,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:04,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920883874] [2025-03-14 01:08:04,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:08:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:04,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-14 01:08:05,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-14 01:08:05,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:08:05,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:05,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:05,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920883874] [2025-03-14 01:08:05,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920883874] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:08:05,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:08:05,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:08:05,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849011107] [2025-03-14 01:08:05,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:08:05,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:08:05,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:05,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:08:05,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:08:05,196 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-03-14 01:08:05,199 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) [2025-03-14 01:08:05,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:05,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-03-14 01:08:05,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:05,278 INFO L124 PetriNetUnfolderBase]: 73/147 cut-off events. [2025-03-14 01:08:05,278 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-14 01:08:05,279 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. [2025-03-14 01:08:05,282 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2025-03-14 01:08:05,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2025-03-14 01:08:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:08:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:08:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-03-14 01:08:05,293 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2025-03-14 01:08:05,294 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2025-03-14 01:08:05,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2025-03-14 01:08:05,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-14 01:08:05,300 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2025-03-14 01:08:05,302 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} [2025-03-14 01:08:05,306 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2025-03-14 01:08:05,306 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2025-03-14 01:08:05,306 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) [2025-03-14 01:08:05,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:05,306 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:05,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 01:08:05,307 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:05,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:05,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1628349778, now seen corresponding path program 1 times [2025-03-14 01:08:05,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:05,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853705887] [2025-03-14 01:08:05,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:08:05,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:05,318 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-14 01:08:05,333 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:08:05,333 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:08:05,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:08:05,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:05,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853705887] [2025-03-14 01:08:05,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853705887] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:08:05,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:08:05,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 01:08:05,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285452897] [2025-03-14 01:08:05,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:08:05,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:08:05,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:05,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:08:05,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:08:05,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:05,468 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) [2025-03-14 01:08:05,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:05,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:05,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:05,603 INFO L124 PetriNetUnfolderBase]: 173/302 cut-off events. [2025-03-14 01:08:05,604 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2025-03-14 01:08:05,606 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. [2025-03-14 01:08:05,608 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 25 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2025-03-14 01:08:05,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 29 transitions, 134 flow [2025-03-14 01:08:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:08:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:08:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2025-03-14 01:08:05,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-03-14 01:08:05,612 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 39 transitions. [2025-03-14 01:08:05,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 29 transitions, 134 flow [2025-03-14 01:08:05,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:08:05,614 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2025-03-14 01:08:05,614 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} [2025-03-14 01:08:05,614 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2025-03-14 01:08:05,615 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2025-03-14 01:08:05,615 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) [2025-03-14 01:08:05,615 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:05,615 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:05,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-14 01:08:05,615 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:05,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:05,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1499780884, now seen corresponding path program 1 times [2025-03-14 01:08:05,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:05,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129074141] [2025-03-14 01:08:05,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:08:05,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:05,624 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-14 01:08:05,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-14 01:08:05,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:08:05,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:05,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:05,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129074141] [2025-03-14 01:08:05,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129074141] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:05,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762906247] [2025-03-14 01:08:05,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:08:05,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:05,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:05,905 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) [2025-03-14 01:08:05,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 01:08:05,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-14 01:08:05,958 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-14 01:08:05,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:08:05,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:05,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-14 01:08:05,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:06,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:06,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762906247] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:06,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:08:06,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 12 [2025-03-14 01:08:06,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915105015] [2025-03-14 01:08:06,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:08:06,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:08:06,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:06,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:08:06,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:08:06,265 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2025-03-14 01:08:06,266 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) [2025-03-14 01:08:06,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:06,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2025-03-14 01:08:06,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:06,354 INFO L124 PetriNetUnfolderBase]: 207/376 cut-off events. [2025-03-14 01:08:06,354 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2025-03-14 01:08:06,355 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. [2025-03-14 01:08:06,357 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 36 selfloop transitions, 6 changer transitions 3/47 dead transitions. [2025-03-14 01:08:06,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 240 flow [2025-03-14 01:08:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:08:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:08:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2025-03-14 01:08:06,358 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2025-03-14 01:08:06,358 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 58 transitions. [2025-03-14 01:08:06,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 240 flow [2025-03-14 01:08:06,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-14 01:08:06,360 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 106 flow [2025-03-14 01:08:06,360 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} [2025-03-14 01:08:06,360 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2025-03-14 01:08:06,360 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 106 flow [2025-03-14 01:08:06,361 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) [2025-03-14 01:08:06,361 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:06,361 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:06,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-14 01:08:06,565 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 [2025-03-14 01:08:06,565 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:06,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:06,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1257977062, now seen corresponding path program 2 times [2025-03-14 01:08:06,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:06,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919417817] [2025-03-14 01:08:06,567 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:08:06,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:06,572 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-14 01:08:06,579 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-14 01:08:06,580 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:08:06,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:06,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:06,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919417817] [2025-03-14 01:08:06,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919417817] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:06,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318228258] [2025-03-14 01:08:06,733 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:08:06,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:06,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:06,735 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) [2025-03-14 01:08:06,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 01:08:06,764 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-14 01:08:06,778 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-14 01:08:06,778 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:08:06,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:06,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-14 01:08:06,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:08:06,844 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:08:06,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318228258] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:08:06,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:08:06,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2025-03-14 01:08:06,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184437898] [2025-03-14 01:08:06,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:08:06,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:08:06,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:06,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:08:06,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-03-14 01:08:06,849 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:06,849 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) [2025-03-14 01:08:06,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:06,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:06,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:06,967 INFO L124 PetriNetUnfolderBase]: 263/458 cut-off events. [2025-03-14 01:08:06,967 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2025-03-14 01:08:06,968 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. [2025-03-14 01:08:06,970 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 36 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2025-03-14 01:08:06,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 260 flow [2025-03-14 01:08:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:08:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:08:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2025-03-14 01:08:06,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2025-03-14 01:08:06,972 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 106 flow. Second operand 6 states and 58 transitions. [2025-03-14 01:08:06,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 260 flow [2025-03-14 01:08:06,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-14 01:08:06,973 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 154 flow [2025-03-14 01:08:06,974 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} [2025-03-14 01:08:06,974 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 13 predicate places. [2025-03-14 01:08:06,974 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 154 flow [2025-03-14 01:08:06,974 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) [2025-03-14 01:08:06,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:06,975 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:06,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-14 01:08:07,179 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 [2025-03-14 01:08:07,179 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:07,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1495270982, now seen corresponding path program 3 times [2025-03-14 01:08:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:07,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315443220] [2025-03-14 01:08:07,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:08:07,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:07,188 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-14 01:08:07,201 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-14 01:08:07,201 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:08:07,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:07,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:07,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315443220] [2025-03-14 01:08:07,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315443220] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:07,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131735526] [2025-03-14 01:08:07,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:08:07,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:07,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:07,372 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) [2025-03-14 01:08:07,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 01:08:07,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-14 01:08:07,416 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-14 01:08:07,416 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:08:07,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:07,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-14 01:08:07,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:08:07,495 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:08:07,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131735526] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:08:07,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:08:07,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2025-03-14 01:08:07,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935022599] [2025-03-14 01:08:07,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:08:07,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:08:07,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:07,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:08:07,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-03-14 01:08:07,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:07,502 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) [2025-03-14 01:08:07,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:07,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:07,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:07,671 INFO L124 PetriNetUnfolderBase]: 367/634 cut-off events. [2025-03-14 01:08:07,671 INFO L125 PetriNetUnfolderBase]: For 788/788 co-relation queries the response was YES. [2025-03-14 01:08:07,672 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. [2025-03-14 01:08:07,676 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 44 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2025-03-14 01:08:07,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 372 flow [2025-03-14 01:08:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:08:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:08:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2025-03-14 01:08:07,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2025-03-14 01:08:07,679 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 154 flow. Second operand 7 states and 66 transitions. [2025-03-14 01:08:07,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 372 flow [2025-03-14 01:08:07,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 361 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-14 01:08:07,682 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 212 flow [2025-03-14 01:08:07,683 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} [2025-03-14 01:08:07,683 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 19 predicate places. [2025-03-14 01:08:07,683 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 212 flow [2025-03-14 01:08:07,683 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) [2025-03-14 01:08:07,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:07,683 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:07,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-14 01:08:07,888 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 [2025-03-14 01:08:07,888 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:07,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:07,889 INFO L85 PathProgramCache]: Analyzing trace with hash -519403035, now seen corresponding path program 4 times [2025-03-14 01:08:07,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:07,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286287814] [2025-03-14 01:08:07,889 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:08:07,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:07,893 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:07,903 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:07,905 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:08:07,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:08,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:08,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286287814] [2025-03-14 01:08:08,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286287814] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:08,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938692885] [2025-03-14 01:08:08,061 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:08:08,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:08,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:08,064 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) [2025-03-14 01:08:08,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 01:08:08,090 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:08,103 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:08,103 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:08:08,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:08,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:08,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:08,211 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938692885] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:08,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:08,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2025-03-14 01:08:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197694930] [2025-03-14 01:08:08,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:08,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-14 01:08:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:08,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-14 01:08:08,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-14 01:08:08,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:08,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 212 flow. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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) [2025-03-14 01:08:08,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:08,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:08,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:09,122 INFO L124 PetriNetUnfolderBase]: 662/1103 cut-off events. [2025-03-14 01:08:09,122 INFO L125 PetriNetUnfolderBase]: For 1767/1767 co-relation queries the response was YES. [2025-03-14 01:08:09,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3508 conditions, 1103 events. 662/1103 cut-off events. For 1767/1767 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4704 event pairs, 3 based on Foata normal form. 33/1136 useless extension candidates. Maximal degree in co-relation 2907. Up to 205 conditions per place. [2025-03-14 01:08:09,128 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 95 selfloop transitions, 84 changer transitions 18/198 dead transitions. [2025-03-14 01:08:09,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 198 transitions, 1397 flow [2025-03-14 01:08:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-14 01:08:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-14 01:08:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 247 transitions. [2025-03-14 01:08:09,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43562610229276894 [2025-03-14 01:08:09,130 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 212 flow. Second operand 27 states and 247 transitions. [2025-03-14 01:08:09,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 198 transitions, 1397 flow [2025-03-14 01:08:09,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 198 transitions, 1365 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-14 01:08:09,135 INFO L231 Difference]: Finished difference. Result has 82 places, 106 transitions, 1013 flow [2025-03-14 01:08:09,135 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=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1013, PETRI_PLACES=82, PETRI_TRANSITIONS=106} [2025-03-14 01:08:09,135 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 59 predicate places. [2025-03-14 01:08:09,136 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 106 transitions, 1013 flow [2025-03-14 01:08:09,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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) [2025-03-14 01:08:09,136 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:09,136 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:09,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-14 01:08:09,340 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 [2025-03-14 01:08:09,340 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:09,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1315178329, now seen corresponding path program 5 times [2025-03-14 01:08:09,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:09,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197247005] [2025-03-14 01:08:09,341 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:08:09,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:09,347 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:09,362 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:09,362 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:08:09,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:09,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:09,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197247005] [2025-03-14 01:08:09,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197247005] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:09,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426456234] [2025-03-14 01:08:09,537 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:08:09,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:09,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:09,540 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) [2025-03-14 01:08:09,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 01:08:09,569 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:09,581 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:09,581 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:08:09,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:09,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:09,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:09,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:09,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426456234] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:09,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:09,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2025-03-14 01:08:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373960225] [2025-03-14 01:08:09,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:09,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-14 01:08:09,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:09,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-14 01:08:09,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-03-14 01:08:09,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:09,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 106 transitions, 1013 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 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) [2025-03-14 01:08:09,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:09,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:09,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:12,214 INFO L124 PetriNetUnfolderBase]: 1554/2552 cut-off events. [2025-03-14 01:08:12,215 INFO L125 PetriNetUnfolderBase]: For 23577/23577 co-relation queries the response was YES. [2025-03-14 01:08:12,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13597 conditions, 2552 events. 1554/2552 cut-off events. For 23577/23577 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12987 event pairs, 25 based on Foata normal form. 56/2608 useless extension candidates. Maximal degree in co-relation 11275. Up to 538 conditions per place. [2025-03-14 01:08:12,233 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 205 selfloop transitions, 338 changer transitions 10/554 dead transitions. [2025-03-14 01:08:12,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 554 transitions, 6190 flow [2025-03-14 01:08:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-14 01:08:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-14 01:08:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 425 transitions. [2025-03-14 01:08:12,235 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.413022351797862 [2025-03-14 01:08:12,235 INFO L175 Difference]: Start difference. First operand has 82 places, 106 transitions, 1013 flow. Second operand 49 states and 425 transitions. [2025-03-14 01:08:12,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 554 transitions, 6190 flow [2025-03-14 01:08:12,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 554 transitions, 5762 flow, removed 208 selfloop flow, removed 4 redundant places. [2025-03-14 01:08:12,291 INFO L231 Difference]: Finished difference. Result has 142 places, 429 transitions, 5241 flow [2025-03-14 01:08:12,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5241, PETRI_PLACES=142, PETRI_TRANSITIONS=429} [2025-03-14 01:08:12,292 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 119 predicate places. [2025-03-14 01:08:12,292 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 429 transitions, 5241 flow [2025-03-14 01:08:12,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 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) [2025-03-14 01:08:12,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:12,292 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:12,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-14 01:08:12,496 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 [2025-03-14 01:08:12,496 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:12,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:12,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1843655867, now seen corresponding path program 6 times [2025-03-14 01:08:12,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:12,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741152682] [2025-03-14 01:08:12,497 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:08:12,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:12,500 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:12,509 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:12,509 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:08:12,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:12,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:12,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741152682] [2025-03-14 01:08:12,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741152682] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:12,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989121026] [2025-03-14 01:08:12,694 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:08:12,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:12,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:12,696 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) [2025-03-14 01:08:12,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-14 01:08:12,728 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:12,738 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:12,738 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:08:12,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:12,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:12,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:12,843 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:12,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989121026] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:12,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:12,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-03-14 01:08:12,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080409899] [2025-03-14 01:08:12,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:12,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-14 01:08:12,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:12,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-14 01:08:12,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2025-03-14 01:08:12,986 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:12,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 429 transitions, 5241 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:08:12,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:12,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:12,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:13,825 INFO L124 PetriNetUnfolderBase]: 2061/3376 cut-off events. [2025-03-14 01:08:13,826 INFO L125 PetriNetUnfolderBase]: For 34767/34767 co-relation queries the response was YES. [2025-03-14 01:08:13,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21483 conditions, 3376 events. 2061/3376 cut-off events. For 34767/34767 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18506 event pairs, 72 based on Foata normal form. 10/3386 useless extension candidates. Maximal degree in co-relation 21414. Up to 875 conditions per place. [2025-03-14 01:08:13,857 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 262 selfloop transitions, 458 changer transitions 5/726 dead transitions. [2025-03-14 01:08:13,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 726 transitions, 10326 flow [2025-03-14 01:08:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-14 01:08:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-14 01:08:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 157 transitions. [2025-03-14 01:08:13,858 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39348370927318294 [2025-03-14 01:08:13,858 INFO L175 Difference]: Start difference. First operand has 142 places, 429 transitions, 5241 flow. Second operand 19 states and 157 transitions. [2025-03-14 01:08:13,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 726 transitions, 10326 flow [2025-03-14 01:08:14,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 726 transitions, 9090 flow, removed 604 selfloop flow, removed 4 redundant places. [2025-03-14 01:08:14,057 INFO L231 Difference]: Finished difference. Result has 164 places, 648 transitions, 8997 flow [2025-03-14 01:08:14,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8997, PETRI_PLACES=164, PETRI_TRANSITIONS=648} [2025-03-14 01:08:14,058 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 141 predicate places. [2025-03-14 01:08:14,058 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 648 transitions, 8997 flow [2025-03-14 01:08:14,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:08:14,058 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:14,058 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:14,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-14 01:08:14,258 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 [2025-03-14 01:08:14,259 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:14,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash 269717729, now seen corresponding path program 7 times [2025-03-14 01:08:14,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:14,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660643922] [2025-03-14 01:08:14,259 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:08:14,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:14,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-14 01:08:14,271 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:14,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:08:14,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660643922] [2025-03-14 01:08:14,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660643922] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349815235] [2025-03-14 01:08:14,383 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:08:14,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:14,385 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) [2025-03-14 01:08:14,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-14 01:08:14,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-14 01:08:14,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:14,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:08:14,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:14,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:14,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:14,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:14,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349815235] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:14,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:14,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2025-03-14 01:08:14,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724593277] [2025-03-14 01:08:14,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:14,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-14 01:08:14,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:14,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-14 01:08:14,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2025-03-14 01:08:14,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:14,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 648 transitions, 8997 flow. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:08:14,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:14,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:14,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:16,330 INFO L124 PetriNetUnfolderBase]: 2592/4231 cut-off events. [2025-03-14 01:08:16,330 INFO L125 PetriNetUnfolderBase]: For 38625/38625 co-relation queries the response was YES. [2025-03-14 01:08:16,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28683 conditions, 4231 events. 2592/4231 cut-off events. For 38625/38625 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23751 event pairs, 22 based on Foata normal form. 94/4325 useless extension candidates. Maximal degree in co-relation 27607. Up to 888 conditions per place. [2025-03-14 01:08:16,367 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 302 selfloop transitions, 775 changer transitions 9/1087 dead transitions. [2025-03-14 01:08:16,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 1087 transitions, 16639 flow [2025-03-14 01:08:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-14 01:08:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-14 01:08:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 378 transitions. [2025-03-14 01:08:16,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-03-14 01:08:16,371 INFO L175 Difference]: Start difference. First operand has 164 places, 648 transitions, 8997 flow. Second operand 44 states and 378 transitions. [2025-03-14 01:08:16,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 1087 transitions, 16639 flow [2025-03-14 01:08:16,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1087 transitions, 16218 flow, removed 210 selfloop flow, removed 1 redundant places. [2025-03-14 01:08:16,734 INFO L231 Difference]: Finished difference. Result has 231 places, 913 transitions, 15185 flow [2025-03-14 01:08:16,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8784, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=15185, PETRI_PLACES=231, PETRI_TRANSITIONS=913} [2025-03-14 01:08:16,735 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 208 predicate places. [2025-03-14 01:08:16,735 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 913 transitions, 15185 flow [2025-03-14 01:08:16,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:08:16,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:16,736 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:16,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-14 01:08:16,936 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 [2025-03-14 01:08:16,936 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:16,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:16,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1893128623, now seen corresponding path program 8 times [2025-03-14 01:08:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:16,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780357612] [2025-03-14 01:08:16,937 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:08:16,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:16,939 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:16,945 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:16,945 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:08:16,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:17,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:17,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780357612] [2025-03-14 01:08:17,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780357612] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:17,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163451437] [2025-03-14 01:08:17,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:08:17,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:17,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:17,066 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) [2025-03-14 01:08:17,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-14 01:08:17,090 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:17,100 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:17,101 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:08:17,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:17,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:17,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:17,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:17,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163451437] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:17,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:17,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-14 01:08:17,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173615686] [2025-03-14 01:08:17,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:17,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-14 01:08:17,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:17,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-14 01:08:17,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2025-03-14 01:08:17,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:17,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 913 transitions, 15185 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) [2025-03-14 01:08:17,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:17,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:17,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:19,021 INFO L124 PetriNetUnfolderBase]: 3486/5770 cut-off events. [2025-03-14 01:08:19,021 INFO L125 PetriNetUnfolderBase]: For 64174/64174 co-relation queries the response was YES. [2025-03-14 01:08:19,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43732 conditions, 5770 events. 3486/5770 cut-off events. For 64174/64174 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 35339 event pairs, 61 based on Foata normal form. 64/5834 useless extension candidates. Maximal degree in co-relation 43418. Up to 1173 conditions per place. [2025-03-14 01:08:19,067 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 433 selfloop transitions, 1058 changer transitions 9/1501 dead transitions. [2025-03-14 01:08:19,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1501 transitions, 26939 flow [2025-03-14 01:08:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-14 01:08:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-03-14 01:08:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 294 transitions. [2025-03-14 01:08:19,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-03-14 01:08:19,069 INFO L175 Difference]: Start difference. First operand has 231 places, 913 transitions, 15185 flow. Second operand 32 states and 294 transitions. [2025-03-14 01:08:19,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1501 transitions, 26939 flow [2025-03-14 01:08:19,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1501 transitions, 26280 flow, removed 287 selfloop flow, removed 6 redundant places. [2025-03-14 01:08:19,900 INFO L231 Difference]: Finished difference. Result has 275 places, 1310 transitions, 25643 flow [2025-03-14 01:08:19,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=14660, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=697, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=25643, PETRI_PLACES=275, PETRI_TRANSITIONS=1310} [2025-03-14 01:08:19,901 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 252 predicate places. [2025-03-14 01:08:19,901 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 1310 transitions, 25643 flow [2025-03-14 01:08:19,901 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) [2025-03-14 01:08:19,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:19,901 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:19,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-14 01:08:20,102 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 [2025-03-14 01:08:20,103 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:20,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:20,107 INFO L85 PathProgramCache]: Analyzing trace with hash -16998021, now seen corresponding path program 9 times [2025-03-14 01:08:20,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:20,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578045357] [2025-03-14 01:08:20,107 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:08:20,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:20,110 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:20,115 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:20,115 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:08:20,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:20,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578045357] [2025-03-14 01:08:20,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578045357] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102513287] [2025-03-14 01:08:20,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:08:20,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:20,204 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) [2025-03-14 01:08:20,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-14 01:08:20,228 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:20,238 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:20,238 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:08:20,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:20,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:20,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:20,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:20,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102513287] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:20,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:20,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2025-03-14 01:08:20,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595033508] [2025-03-14 01:08:20,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:20,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-14 01:08:20,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:20,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-14 01:08:20,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2025-03-14 01:08:20,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:20,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 1310 transitions, 25643 flow. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2025-03-14 01:08:20,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:20,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:20,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:22,366 INFO L124 PetriNetUnfolderBase]: 3532/5810 cut-off events. [2025-03-14 01:08:22,367 INFO L125 PetriNetUnfolderBase]: For 88954/88954 co-relation queries the response was YES. [2025-03-14 01:08:22,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50199 conditions, 5810 events. 3532/5810 cut-off events. For 88954/88954 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 35468 event pairs, 124 based on Foata normal form. 8/5818 useless extension candidates. Maximal degree in co-relation 49975. Up to 1277 conditions per place. [2025-03-14 01:08:22,441 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 440 selfloop transitions, 1014 changer transitions 4/1459 dead transitions. [2025-03-14 01:08:22,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1459 transitions, 30409 flow [2025-03-14 01:08:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-14 01:08:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-14 01:08:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 199 transitions. [2025-03-14 01:08:22,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4512471655328798 [2025-03-14 01:08:22,444 INFO L175 Difference]: Start difference. First operand has 275 places, 1310 transitions, 25643 flow. Second operand 21 states and 199 transitions. [2025-03-14 01:08:22,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1459 transitions, 30409 flow [2025-03-14 01:08:23,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1459 transitions, 30085 flow, removed 154 selfloop flow, removed 2 redundant places. [2025-03-14 01:08:23,814 INFO L231 Difference]: Finished difference. Result has 295 places, 1336 transitions, 28635 flow [2025-03-14 01:08:23,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25186, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=979, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=28635, PETRI_PLACES=295, PETRI_TRANSITIONS=1336} [2025-03-14 01:08:23,816 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 272 predicate places. [2025-03-14 01:08:23,816 INFO L471 AbstractCegarLoop]: Abstraction has has 295 places, 1336 transitions, 28635 flow [2025-03-14 01:08:23,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2025-03-14 01:08:23,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:23,816 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:23,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-14 01:08:24,016 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 [2025-03-14 01:08:24,017 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:24,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash 7289019, now seen corresponding path program 10 times [2025-03-14 01:08:24,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:24,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146414972] [2025-03-14 01:08:24,017 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:08:24,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:24,020 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:24,024 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:24,024 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:08:24,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:24,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146414972] [2025-03-14 01:08:24,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146414972] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006865329] [2025-03-14 01:08:24,148 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:08:24,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:24,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:24,150 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) [2025-03-14 01:08:24,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-14 01:08:24,174 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:24,184 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:24,184 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:08:24,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:24,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:24,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:24,266 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:24,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006865329] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:24,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:24,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-14 01:08:24,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085162691] [2025-03-14 01:08:24,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:24,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-14 01:08:24,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:24,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-14 01:08:24,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-03-14 01:08:24,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:24,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 1336 transitions, 28635 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:08:24,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:24,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:24,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:26,496 INFO L124 PetriNetUnfolderBase]: 4028/6661 cut-off events. [2025-03-14 01:08:26,496 INFO L125 PetriNetUnfolderBase]: For 132530/132530 co-relation queries the response was YES. [2025-03-14 01:08:26,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62173 conditions, 6661 events. 4028/6661 cut-off events. For 132530/132530 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 41933 event pairs, 180 based on Foata normal form. 53/6714 useless extension candidates. Maximal degree in co-relation 61959. Up to 1671 conditions per place. [2025-03-14 01:08:26,553 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 482 selfloop transitions, 1166 changer transitions 8/1657 dead transitions. [2025-03-14 01:08:26,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1657 transitions, 37880 flow [2025-03-14 01:08:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-14 01:08:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-14 01:08:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 221 transitions. [2025-03-14 01:08:26,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4575569358178054 [2025-03-14 01:08:26,555 INFO L175 Difference]: Start difference. First operand has 295 places, 1336 transitions, 28635 flow. Second operand 23 states and 221 transitions. [2025-03-14 01:08:26,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1657 transitions, 37880 flow [2025-03-14 01:08:28,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 1657 transitions, 36949 flow, removed 34 selfloop flow, removed 9 redundant places. [2025-03-14 01:08:28,300 INFO L231 Difference]: Finished difference. Result has 316 places, 1526 transitions, 36885 flow [2025-03-14 01:08:28,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27836, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=991, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=36885, PETRI_PLACES=316, PETRI_TRANSITIONS=1526} [2025-03-14 01:08:28,301 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 293 predicate places. [2025-03-14 01:08:28,302 INFO L471 AbstractCegarLoop]: Abstraction has has 316 places, 1526 transitions, 36885 flow [2025-03-14 01:08:28,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:08:28,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:28,302 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:28,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-14 01:08:28,502 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 [2025-03-14 01:08:28,503 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:28,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1305800289, now seen corresponding path program 11 times [2025-03-14 01:08:28,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:28,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319746384] [2025-03-14 01:08:28,503 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:08:28,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:28,506 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:28,511 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:28,511 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:08:28,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:28,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:28,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319746384] [2025-03-14 01:08:28,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319746384] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:28,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401503829] [2025-03-14 01:08:28,614 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:08:28,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:28,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:28,616 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) [2025-03-14 01:08:28,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-14 01:08:28,641 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:28,650 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:28,650 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:08:28,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:28,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:28,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:28,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:28,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401503829] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:28,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:28,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2025-03-14 01:08:28,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532604096] [2025-03-14 01:08:28,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:28,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-14 01:08:28,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:28,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-14 01:08:28,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2025-03-14 01:08:28,833 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:28,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 1526 transitions, 36885 flow. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 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) [2025-03-14 01:08:28,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:28,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:28,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:31,248 INFO L124 PetriNetUnfolderBase]: 4234/6956 cut-off events. [2025-03-14 01:08:31,248 INFO L125 PetriNetUnfolderBase]: For 168056/168056 co-relation queries the response was YES. [2025-03-14 01:08:31,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71880 conditions, 6956 events. 4234/6956 cut-off events. For 168056/168056 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 43536 event pairs, 254 based on Foata normal form. 14/6970 useless extension candidates. Maximal degree in co-relation 71489. Up to 1736 conditions per place. [2025-03-14 01:08:31,310 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 350 selfloop transitions, 1380 changer transitions 2/1733 dead transitions. [2025-03-14 01:08:31,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1733 transitions, 44236 flow [2025-03-14 01:08:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-14 01:08:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-14 01:08:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 190 transitions. [2025-03-14 01:08:31,311 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4308390022675737 [2025-03-14 01:08:31,312 INFO L175 Difference]: Start difference. First operand has 316 places, 1526 transitions, 36885 flow. Second operand 21 states and 190 transitions. [2025-03-14 01:08:31,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1733 transitions, 44236 flow [2025-03-14 01:08:33,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1733 transitions, 43857 flow, removed 98 selfloop flow, removed 14 redundant places. [2025-03-14 01:08:33,863 INFO L231 Difference]: Finished difference. Result has 330 places, 1643 transitions, 44814 flow [2025-03-14 01:08:33,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=36464, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=44814, PETRI_PLACES=330, PETRI_TRANSITIONS=1643} [2025-03-14 01:08:33,865 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 307 predicate places. [2025-03-14 01:08:33,865 INFO L471 AbstractCegarLoop]: Abstraction has has 330 places, 1643 transitions, 44814 flow [2025-03-14 01:08:33,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 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) [2025-03-14 01:08:33,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:33,865 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:33,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-14 01:08:34,070 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 [2025-03-14 01:08:34,070 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:34,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1147121101, now seen corresponding path program 12 times [2025-03-14 01:08:34,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:34,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61032020] [2025-03-14 01:08:34,071 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:08:34,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:34,074 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:34,078 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:34,078 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:08:34,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:34,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:34,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61032020] [2025-03-14 01:08:34,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61032020] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:34,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92261208] [2025-03-14 01:08:34,173 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:08:34,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:34,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:34,176 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) [2025-03-14 01:08:34,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-14 01:08:34,200 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:08:34,209 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:34,210 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:08:34,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:34,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:34,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:34,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:34,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92261208] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:34,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:34,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2025-03-14 01:08:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279620834] [2025-03-14 01:08:34,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:34,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-14 01:08:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:34,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-14 01:08:34,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:08:34,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:34,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1643 transitions, 44814 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 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) [2025-03-14 01:08:34,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:34,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:34,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:40,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-14 01:08:44,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-14 01:08:46,979 INFO L124 PetriNetUnfolderBase]: 6444/10607 cut-off events. [2025-03-14 01:08:46,979 INFO L125 PetriNetUnfolderBase]: For 311584/311584 co-relation queries the response was YES. [2025-03-14 01:08:47,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120708 conditions, 10607 events. 6444/10607 cut-off events. For 311584/311584 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 69960 event pairs, 84 based on Foata normal form. 54/10661 useless extension candidates. Maximal degree in co-relation 119333. Up to 3811 conditions per place. [2025-03-14 01:08:47,203 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 1156 selfloop transitions, 1740 changer transitions 15/2912 dead transitions. [2025-03-14 01:08:47,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 2912 transitions, 83227 flow [2025-03-14 01:08:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-14 01:08:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2025-03-14 01:08:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 438 transitions. [2025-03-14 01:08:47,207 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41714285714285715 [2025-03-14 01:08:47,207 INFO L175 Difference]: Start difference. First operand has 330 places, 1643 transitions, 44814 flow. Second operand 50 states and 438 transitions. [2025-03-14 01:08:47,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 2912 transitions, 83227 flow [2025-03-14 01:08:55,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 2912 transitions, 82680 flow, removed 196 selfloop flow, removed 8 redundant places. [2025-03-14 01:08:55,114 INFO L231 Difference]: Finished difference. Result has 399 places, 2633 transitions, 78306 flow [2025-03-14 01:08:55,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44477, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=905, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=78306, PETRI_PLACES=399, PETRI_TRANSITIONS=2633} [2025-03-14 01:08:55,116 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 376 predicate places. [2025-03-14 01:08:55,116 INFO L471 AbstractCegarLoop]: Abstraction has has 399 places, 2633 transitions, 78306 flow [2025-03-14 01:08:55,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 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) [2025-03-14 01:08:55,117 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:55,117 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:55,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-14 01:08:55,317 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 [2025-03-14 01:08:55,317 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:08:55,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:55,318 INFO L85 PathProgramCache]: Analyzing trace with hash -618643563, now seen corresponding path program 13 times [2025-03-14 01:08:55,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:55,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418801901] [2025-03-14 01:08:55,318 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:08:55,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:55,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-14 01:08:55,324 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:55,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:08:55,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:55,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:55,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418801901] [2025-03-14 01:08:55,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418801901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:55,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988280382] [2025-03-14 01:08:55,410 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:08:55,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:55,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:55,413 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) [2025-03-14 01:08:55,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-14 01:08:55,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-14 01:08:55,453 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:08:55,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:08:55,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:55,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:08:55,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:55,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:55,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988280382] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:55,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:55,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2025-03-14 01:08:55,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549625246] [2025-03-14 01:08:55,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:55,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-14 01:08:55,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:55,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-14 01:08:55,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-03-14 01:08:55,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:08:55,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 2633 transitions, 78306 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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) [2025-03-14 01:08:55,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:55,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:08:55,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:09:01,615 INFO L124 PetriNetUnfolderBase]: 6656/10979 cut-off events. [2025-03-14 01:09:01,615 INFO L125 PetriNetUnfolderBase]: For 375769/375769 co-relation queries the response was YES. [2025-03-14 01:09:01,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136222 conditions, 10979 events. 6656/10979 cut-off events. For 375769/375769 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 73044 event pairs, 1280 based on Foata normal form. 10/10989 useless extension candidates. Maximal degree in co-relation 135990. Up to 6916 conditions per place. [2025-03-14 01:09:01,776 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1605 selfloop transitions, 1261 changer transitions 4/2871 dead transitions. [2025-03-14 01:09:01,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2871 transitions, 89516 flow [2025-03-14 01:09:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-14 01:09:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-14 01:09:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 125 transitions. [2025-03-14 01:09:01,777 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2025-03-14 01:09:01,777 INFO L175 Difference]: Start difference. First operand has 399 places, 2633 transitions, 78306 flow. Second operand 15 states and 125 transitions. [2025-03-14 01:09:01,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 2871 transitions, 89516 flow [2025-03-14 01:09:11,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 2871 transitions, 87746 flow, removed 857 selfloop flow, removed 5 redundant places. [2025-03-14 01:09:11,918 INFO L231 Difference]: Finished difference. Result has 418 places, 2755 transitions, 85723 flow [2025-03-14 01:09:11,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=76697, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=85723, PETRI_PLACES=418, PETRI_TRANSITIONS=2755} [2025-03-14 01:09:11,921 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 395 predicate places. [2025-03-14 01:09:11,921 INFO L471 AbstractCegarLoop]: Abstraction has has 418 places, 2755 transitions, 85723 flow [2025-03-14 01:09:11,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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) [2025-03-14 01:09:11,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:09:11,922 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:09:11,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-14 01:09:12,123 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,SelfDestructingSolverStorable14 [2025-03-14 01:09:12,123 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:09:12,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:09:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash 530444179, now seen corresponding path program 14 times [2025-03-14 01:09:12,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:09:12,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288229480] [2025-03-14 01:09:12,124 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:09:12,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:09:12,127 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:09:12,132 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:09:12,132 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:09:12,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:09:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:09:12,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:09:12,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288229480] [2025-03-14 01:09:12,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288229480] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:09:12,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224776843] [2025-03-14 01:09:12,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:09:12,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:09:12,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:09:12,305 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) [2025-03-14 01:09:12,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-14 01:09:12,331 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:09:12,340 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:09:12,340 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:09:12,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:09:12,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:09:12,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:09:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:09:12,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:09:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:09:12,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224776843] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:09:12,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:09:12,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-03-14 01:09:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580259332] [2025-03-14 01:09:12,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:09:12,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-14 01:09:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:09:12,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-14 01:09:12,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2025-03-14 01:09:12,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:09:12,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 2755 transitions, 85723 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:09:12,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:09:12,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:09:12,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:09:20,277 INFO L124 PetriNetUnfolderBase]: 7679/12682 cut-off events. [2025-03-14 01:09:20,278 INFO L125 PetriNetUnfolderBase]: For 503628/503628 co-relation queries the response was YES. [2025-03-14 01:09:20,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165179 conditions, 12682 events. 7679/12682 cut-off events. For 503628/503628 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 86899 event pairs, 790 based on Foata normal form. 83/12765 useless extension candidates. Maximal degree in co-relation 164336. Up to 5073 conditions per place. [2025-03-14 01:09:20,716 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1709 selfloop transitions, 1604 changer transitions 4/3318 dead transitions. [2025-03-14 01:09:20,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 3318 transitions, 108079 flow [2025-03-14 01:09:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-14 01:09:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-14 01:09:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 192 transitions. [2025-03-14 01:09:20,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2025-03-14 01:09:20,717 INFO L175 Difference]: Start difference. First operand has 418 places, 2755 transitions, 85723 flow. Second operand 21 states and 192 transitions. [2025-03-14 01:09:20,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 3318 transitions, 108079 flow [2025-03-14 01:09:33,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 3318 transitions, 107484 flow, removed 131 selfloop flow, removed 5 redundant places. [2025-03-14 01:09:33,645 INFO L231 Difference]: Finished difference. Result has 443 places, 3016 transitions, 100472 flow [2025-03-14 01:09:33,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=85130, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=100472, PETRI_PLACES=443, PETRI_TRANSITIONS=3016} [2025-03-14 01:09:33,648 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 420 predicate places. [2025-03-14 01:09:33,648 INFO L471 AbstractCegarLoop]: Abstraction has has 443 places, 3016 transitions, 100472 flow [2025-03-14 01:09:33,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:09:33,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:09:33,648 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:09:33,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-14 01:09:33,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:09:33,849 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:09:33,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:09:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash 810232887, now seen corresponding path program 15 times [2025-03-14 01:09:33,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:09:33,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702311589] [2025-03-14 01:09:33,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:09:33,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:09:33,853 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:09:33,858 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:09:33,858 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:09:33,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:09:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:09:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:09:33,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702311589] [2025-03-14 01:09:33,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702311589] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:09:33,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179264271] [2025-03-14 01:09:33,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:09:33,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:09:33,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:09:33,983 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:09:33,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-14 01:09:34,008 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:09:34,017 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:09:34,017 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:09:34,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:09:34,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:09:34,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:09:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:09:34,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:09:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:09:34,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179264271] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:09:34,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:09:34,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2025-03-14 01:09:34,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760287857] [2025-03-14 01:09:34,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:09:34,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-14 01:09:34,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:09:34,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-14 01:09:34,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-03-14 01:09:34,242 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-14 01:09:34,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 3016 transitions, 100472 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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) [2025-03-14 01:09:34,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:09:34,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-14 01:09:34,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand