./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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/mult-dist.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 c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:38:20,398 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:38:20,445 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:38:20,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:38:20,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:38:20,465 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:38:20,465 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:38:20,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:38:20,466 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:38:20,466 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:38:20,466 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:38:20,466 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:38:20,466 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:38:20,466 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:38:20,466 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:38:20,467 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:38:20,467 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:38:20,467 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:38:20,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:38:20,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:38:20,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:38:20,467 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:38:20,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:38:20,467 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:38:20,467 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:38:20,468 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:38:20,468 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:38:20,468 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:38:20,468 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:38:20,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:38:20,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:38:20,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:38:20,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:38:20,468 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:38:20,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:38:20,468 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:38:20,469 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:38:20,469 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:38:20,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:38:20,469 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:38:20,469 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:38:20,469 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:38:20,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:38:20,469 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 -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2025-03-17 06:38:20,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:38:20,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:38:20,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:38:20,692 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:38:20,693 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:38:20,694 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-dist.wvr.c [2025-03-17 06:38:21,870 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eab373d9/aeaa8fcf443e45c99ba52231b1d11c1b/FLAGc2f5b038d [2025-03-17 06:38:22,081 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:38:22,082 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2025-03-17 06:38:22,097 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eab373d9/aeaa8fcf443e45c99ba52231b1d11c1b/FLAGc2f5b038d [2025-03-17 06:38:22,449 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eab373d9/aeaa8fcf443e45c99ba52231b1d11c1b [2025-03-17 06:38:22,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:38:22,452 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:38:22,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:38:22,453 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:38:22,456 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:38:22,456 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,457 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d15c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22, skipping insertion in model container [2025-03-17 06:38:22,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,469 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:38:22,599 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/mult-dist.wvr.c[2155,2168] [2025-03-17 06:38:22,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:38:22,613 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:38:22,626 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/mult-dist.wvr.c[2155,2168] [2025-03-17 06:38:22,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:38:22,638 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:38:22,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22 WrapperNode [2025-03-17 06:38:22,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:38:22,641 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:38:22,641 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:38:22,641 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:38:22,646 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,650 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,662 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2025-03-17 06:38:22,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:38:22,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:38:22,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:38:22,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:38:22,669 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,670 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,676 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]. [2025-03-17 06:38:22,676 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,679 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,679 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,681 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:38:22,681 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:38:22,682 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:38:22,682 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:38:22,685 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (1/1) ... [2025-03-17 06:38:22,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:38:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:22,706 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) [2025-03-17 06:38:22,708 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 [2025-03-17 06:38:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:38:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:38:22,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:38:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:38:22,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:38:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 06:38:22,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 06:38:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:38:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:38:22,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:38:22,724 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:38:22,790 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:38:22,792 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:38:22,912 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:38:22,912 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:38:23,008 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:38:23,008 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:38:23,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:38:23 BoogieIcfgContainer [2025-03-17 06:38:23,009 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:38:23,011 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:38:23,011 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:38:23,014 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:38:23,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:38:22" (1/3) ... [2025-03-17 06:38:23,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18063371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:38:23, skipping insertion in model container [2025-03-17 06:38:23,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:38:22" (2/3) ... [2025-03-17 06:38:23,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18063371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:38:23, skipping insertion in model container [2025-03-17 06:38:23,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:38:23" (3/3) ... [2025-03-17 06:38:23,017 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2025-03-17 06:38:23,029 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:38:23,030 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-dist.wvr.c that has 4 procedures, 23 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-17 06:38:23,031 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:38:23,081 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 06:38:23,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2025-03-17 06:38:23,131 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-17 06:38:23,134 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:38:23,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 22 events. 3/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-03-17 06:38:23,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 71 flow [2025-03-17 06:38:23,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 60 flow [2025-03-17 06:38:23,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:38:23,160 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;@688439ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:38:23,160 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 06:38:23,170 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:38:23,170 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-17 06:38:23,170 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:38:23,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:23,171 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:23,171 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:23,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:23,175 INFO L85 PathProgramCache]: Analyzing trace with hash -112341710, now seen corresponding path program 1 times [2025-03-17 06:38:23,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:23,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436205904] [2025-03-17 06:38:23,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:38:23,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:23,240 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:38:23,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:38:23,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:23,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:23,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:23,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436205904] [2025-03-17 06:38:23,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436205904] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:38:23,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:38:23,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:38:23,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906736532] [2025-03-17 06:38:23,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:23,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:38:23,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:23,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:38:23,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:38:23,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:23,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:23,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:23,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:23,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:23,839 INFO L124 PetriNetUnfolderBase]: 386/565 cut-off events. [2025-03-17 06:38:23,842 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2025-03-17 06:38:23,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 565 events. 386/565 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1780 event pairs, 124 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2025-03-17 06:38:23,851 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 32 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2025-03-17 06:38:23,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 183 flow [2025-03-17 06:38:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:38:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:38:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2025-03-17 06:38:23,862 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 06:38:23,864 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 60 flow. Second operand 3 states and 50 transitions. [2025-03-17 06:38:23,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 183 flow [2025-03-17 06:38:23,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 06:38:23,875 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 74 flow [2025-03-17 06:38:23,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2025-03-17 06:38:23,882 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2025-03-17 06:38:23,882 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 74 flow [2025-03-17 06:38:23,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:23,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:23,883 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:23,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:38:23,883 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:23,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:23,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1859910965, now seen corresponding path program 1 times [2025-03-17 06:38:23,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:23,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837702653] [2025-03-17 06:38:23,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:38:23,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:23,894 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:38:23,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:23,920 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:23,920 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:24,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:24,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837702653] [2025-03-17 06:38:24,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837702653] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:38:24,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:38:24,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:38:24,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910875212] [2025-03-17 06:38:24,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:24,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:38:24,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:24,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:38:24,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:38:24,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:24,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:24,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:24,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:24,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:24,397 INFO L124 PetriNetUnfolderBase]: 544/771 cut-off events. [2025-03-17 06:38:24,397 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2025-03-17 06:38:24,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 771 events. 544/771 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2522 event pairs, 203 based on Foata normal form. 2/773 useless extension candidates. Maximal degree in co-relation 545. Up to 554 conditions per place. [2025-03-17 06:38:24,401 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 47 selfloop transitions, 18 changer transitions 3/69 dead transitions. [2025-03-17 06:38:24,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 69 transitions, 347 flow [2025-03-17 06:38:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:38:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:38:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2025-03-17 06:38:24,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2025-03-17 06:38:24,402 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 74 flow. Second operand 7 states and 87 transitions. [2025-03-17 06:38:24,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 69 transitions, 347 flow [2025-03-17 06:38:24,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 69 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:38:24,404 INFO L231 Difference]: Finished difference. Result has 34 places, 40 transitions, 198 flow [2025-03-17 06:38:24,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=34, PETRI_TRANSITIONS=40} [2025-03-17 06:38:24,404 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2025-03-17 06:38:24,404 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 40 transitions, 198 flow [2025-03-17 06:38:24,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:24,405 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:24,405 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:24,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:38:24,405 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:24,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -195551835, now seen corresponding path program 1 times [2025-03-17 06:38:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:24,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680339079] [2025-03-17 06:38:24,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:38:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:24,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:38:24,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:24,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:24,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:24,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:24,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680339079] [2025-03-17 06:38:24,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680339079] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:24,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076018599] [2025-03-17 06:38:24,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:38:24,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:24,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:24,587 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) [2025-03-17 06:38:24,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:38:24,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:38:24,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:24,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:24,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:24,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:38:24,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:24,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:25,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076018599] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:25,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:25,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-03-17 06:38:25,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175898657] [2025-03-17 06:38:25,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:25,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 06:38:25,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:25,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 06:38:25,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:38:25,289 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:25,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 40 transitions, 198 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:25,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:25,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:25,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:25,675 INFO L124 PetriNetUnfolderBase]: 796/1158 cut-off events. [2025-03-17 06:38:25,675 INFO L125 PetriNetUnfolderBase]: For 1081/1081 co-relation queries the response was YES. [2025-03-17 06:38:25,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3748 conditions, 1158 events. 796/1158 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4410 event pairs, 142 based on Foata normal form. 13/1171 useless extension candidates. Maximal degree in co-relation 2112. Up to 371 conditions per place. [2025-03-17 06:38:25,682 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 91 selfloop transitions, 34 changer transitions 0/126 dead transitions. [2025-03-17 06:38:25,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 126 transitions, 784 flow [2025-03-17 06:38:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:38:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:38:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2025-03-17 06:38:25,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.576 [2025-03-17 06:38:25,684 INFO L175 Difference]: Start difference. First operand has 34 places, 40 transitions, 198 flow. Second operand 10 states and 144 transitions. [2025-03-17 06:38:25,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 126 transitions, 784 flow [2025-03-17 06:38:25,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 126 transitions, 762 flow, removed 11 selfloop flow, removed 0 redundant places. [2025-03-17 06:38:25,688 INFO L231 Difference]: Finished difference. Result has 49 places, 60 transitions, 425 flow [2025-03-17 06:38:25,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=425, PETRI_PLACES=49, PETRI_TRANSITIONS=60} [2025-03-17 06:38:25,689 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2025-03-17 06:38:25,689 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 60 transitions, 425 flow [2025-03-17 06:38:25,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:25,689 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:25,689 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:25,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:38:25,894 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 [2025-03-17 06:38:25,894 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:25,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:25,895 INFO L85 PathProgramCache]: Analyzing trace with hash -998645783, now seen corresponding path program 2 times [2025-03-17 06:38:25,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:25,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826275356] [2025-03-17 06:38:25,895 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:38:25,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:25,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:25,914 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:25,914 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:25,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:26,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:26,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826275356] [2025-03-17 06:38:26,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826275356] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:26,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221853369] [2025-03-17 06:38:26,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:38:26,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:26,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:26,065 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) [2025-03-17 06:38:26,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:38:26,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:26,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:26,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:26,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:26,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:38:26,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:26,223 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:26,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221853369] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:26,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:38:26,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 14 [2025-03-17 06:38:26,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279121362] [2025-03-17 06:38:26,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:26,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:38:26,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:26,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:38:26,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:38:26,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:26,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 60 transitions, 425 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:26,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:26,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:26,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:26,728 INFO L124 PetriNetUnfolderBase]: 1141/1670 cut-off events. [2025-03-17 06:38:26,728 INFO L125 PetriNetUnfolderBase]: For 5136/5136 co-relation queries the response was YES. [2025-03-17 06:38:26,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7332 conditions, 1670 events. 1141/1670 cut-off events. For 5136/5136 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6737 event pairs, 235 based on Foata normal form. 4/1674 useless extension candidates. Maximal degree in co-relation 4209. Up to 564 conditions per place. [2025-03-17 06:38:26,740 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 107 selfloop transitions, 31 changer transitions 0/139 dead transitions. [2025-03-17 06:38:26,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 139 transitions, 1182 flow [2025-03-17 06:38:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:38:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:38:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-03-17 06:38:26,741 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.615 [2025-03-17 06:38:26,741 INFO L175 Difference]: Start difference. First operand has 49 places, 60 transitions, 425 flow. Second operand 8 states and 123 transitions. [2025-03-17 06:38:26,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 139 transitions, 1182 flow [2025-03-17 06:38:26,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 139 transitions, 1164 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-03-17 06:38:26,758 INFO L231 Difference]: Finished difference. Result has 63 places, 76 transitions, 687 flow [2025-03-17 06:38:26,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=687, PETRI_PLACES=63, PETRI_TRANSITIONS=76} [2025-03-17 06:38:26,760 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2025-03-17 06:38:26,760 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 76 transitions, 687 flow [2025-03-17 06:38:26,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:26,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:26,760 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:26,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 06:38:26,964 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 [2025-03-17 06:38:26,964 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:26,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1770088631, now seen corresponding path program 2 times [2025-03-17 06:38:26,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:26,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493950613] [2025-03-17 06:38:26,965 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:38:26,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:26,970 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:26,981 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:26,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:26,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:27,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:27,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493950613] [2025-03-17 06:38:27,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493950613] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:27,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69334318] [2025-03-17 06:38:27,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:38:27,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:27,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:27,107 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) [2025-03-17 06:38:27,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:38:27,140 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:27,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:27,160 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:27,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:27,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:27,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:27,200 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:38:27,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69334318] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:38:27,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:38:27,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-03-17 06:38:27,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384705347] [2025-03-17 06:38:27,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:27,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:38:27,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:27,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:38:27,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:38:27,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:27,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 76 transitions, 687 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:27,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:27,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:27,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:27,470 INFO L124 PetriNetUnfolderBase]: 1178/1723 cut-off events. [2025-03-17 06:38:27,471 INFO L125 PetriNetUnfolderBase]: For 10240/10240 co-relation queries the response was YES. [2025-03-17 06:38:27,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8982 conditions, 1723 events. 1178/1723 cut-off events. For 10240/10240 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6936 event pairs, 477 based on Foata normal form. 2/1725 useless extension candidates. Maximal degree in co-relation 6699. Up to 1377 conditions per place. [2025-03-17 06:38:27,481 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 88 selfloop transitions, 32 changer transitions 3/124 dead transitions. [2025-03-17 06:38:27,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 124 transitions, 1332 flow [2025-03-17 06:38:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:38:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:38:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2025-03-17 06:38:27,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2025-03-17 06:38:27,482 INFO L175 Difference]: Start difference. First operand has 63 places, 76 transitions, 687 flow. Second operand 7 states and 86 transitions. [2025-03-17 06:38:27,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 124 transitions, 1332 flow [2025-03-17 06:38:27,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 124 transitions, 1312 flow, removed 10 selfloop flow, removed 0 redundant places. [2025-03-17 06:38:27,498 INFO L231 Difference]: Finished difference. Result has 72 places, 94 transitions, 974 flow [2025-03-17 06:38:27,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=72, PETRI_TRANSITIONS=94} [2025-03-17 06:38:27,499 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2025-03-17 06:38:27,499 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 94 transitions, 974 flow [2025-03-17 06:38:27,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:27,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:27,499 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:27,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 06:38:27,699 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 [2025-03-17 06:38:27,700 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:27,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash 6105641, now seen corresponding path program 3 times [2025-03-17 06:38:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:27,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441112508] [2025-03-17 06:38:27,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:38:27,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:27,706 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:27,714 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:27,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:38:27,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:27,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:27,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441112508] [2025-03-17 06:38:27,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441112508] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:27,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602345015] [2025-03-17 06:38:27,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:38:27,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:27,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:27,871 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) [2025-03-17 06:38:27,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:38:27,906 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:27,925 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:27,925 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:38:27,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:27,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 06:38:27,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:28,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:28,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602345015] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:28,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:38:28,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2025-03-17 06:38:28,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653435078] [2025-03-17 06:38:28,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:28,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:38:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:28,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:38:28,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:38:28,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:28,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 974 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:28,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:28,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:28,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:29,015 INFO L124 PetriNetUnfolderBase]: 1330/1950 cut-off events. [2025-03-17 06:38:29,015 INFO L125 PetriNetUnfolderBase]: For 14142/14142 co-relation queries the response was YES. [2025-03-17 06:38:29,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11139 conditions, 1950 events. 1330/1950 cut-off events. For 14142/14142 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8086 event pairs, 317 based on Foata normal form. 6/1956 useless extension candidates. Maximal degree in co-relation 8460. Up to 694 conditions per place. [2025-03-17 06:38:29,030 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 123 selfloop transitions, 43 changer transitions 0/167 dead transitions. [2025-03-17 06:38:29,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 167 transitions, 1851 flow [2025-03-17 06:38:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:38:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:38:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-03-17 06:38:29,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.615 [2025-03-17 06:38:29,032 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 974 flow. Second operand 8 states and 123 transitions. [2025-03-17 06:38:29,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 167 transitions, 1851 flow [2025-03-17 06:38:29,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 167 transitions, 1767 flow, removed 42 selfloop flow, removed 0 redundant places. [2025-03-17 06:38:29,058 INFO L231 Difference]: Finished difference. Result has 84 places, 106 transitions, 1237 flow [2025-03-17 06:38:29,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1237, PETRI_PLACES=84, PETRI_TRANSITIONS=106} [2025-03-17 06:38:29,059 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2025-03-17 06:38:29,059 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 106 transitions, 1237 flow [2025-03-17 06:38:29,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:29,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:29,059 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:29,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:38:29,260 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 [2025-03-17 06:38:29,260 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:29,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash 954400387, now seen corresponding path program 4 times [2025-03-17 06:38:29,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:29,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003010639] [2025-03-17 06:38:29,261 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:38:29,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:29,264 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:29,271 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:29,271 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:38:29,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:29,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:29,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003010639] [2025-03-17 06:38:29,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003010639] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:38:29,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:38:29,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:38:29,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279187929] [2025-03-17 06:38:29,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:29,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:38:29,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:29,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:38:29,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:38:29,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:29,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 106 transitions, 1237 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:29,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:29,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:29,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:29,731 INFO L124 PetriNetUnfolderBase]: 1353/2003 cut-off events. [2025-03-17 06:38:29,731 INFO L125 PetriNetUnfolderBase]: For 16820/16820 co-relation queries the response was YES. [2025-03-17 06:38:29,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12027 conditions, 2003 events. 1353/2003 cut-off events. For 16820/16820 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8599 event pairs, 376 based on Foata normal form. 2/2005 useless extension candidates. Maximal degree in co-relation 11338. Up to 1093 conditions per place. [2025-03-17 06:38:29,746 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 128 selfloop transitions, 34 changer transitions 3/166 dead transitions. [2025-03-17 06:38:29,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 166 transitions, 2094 flow [2025-03-17 06:38:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:38:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:38:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2025-03-17 06:38:29,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.515 [2025-03-17 06:38:29,748 INFO L175 Difference]: Start difference. First operand has 84 places, 106 transitions, 1237 flow. Second operand 8 states and 103 transitions. [2025-03-17 06:38:29,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 166 transitions, 2094 flow [2025-03-17 06:38:29,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 166 transitions, 2011 flow, removed 26 selfloop flow, removed 1 redundant places. [2025-03-17 06:38:29,784 INFO L231 Difference]: Finished difference. Result has 93 places, 116 transitions, 1419 flow [2025-03-17 06:38:29,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1419, PETRI_PLACES=93, PETRI_TRANSITIONS=116} [2025-03-17 06:38:29,785 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2025-03-17 06:38:29,785 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 116 transitions, 1419 flow [2025-03-17 06:38:29,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:29,786 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:29,786 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:29,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:38:29,786 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:29,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1962248353, now seen corresponding path program 3 times [2025-03-17 06:38:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286289142] [2025-03-17 06:38:29,787 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:38:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:29,791 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:29,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:29,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:38:29,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:29,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:29,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286289142] [2025-03-17 06:38:29,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286289142] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:29,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909167376] [2025-03-17 06:38:29,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:38:29,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:29,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:29,948 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) [2025-03-17 06:38:29,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:38:29,979 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:30,000 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:30,001 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:38:30,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:30,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:30,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:30,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:30,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909167376] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:30,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:30,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-17 06:38:30,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741290952] [2025-03-17 06:38:30,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:30,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 06:38:30,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:30,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 06:38:30,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:38:30,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:30,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 116 transitions, 1419 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) [2025-03-17 06:38:30,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:30,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:30,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:31,249 INFO L124 PetriNetUnfolderBase]: 2042/3015 cut-off events. [2025-03-17 06:38:31,249 INFO L125 PetriNetUnfolderBase]: For 31092/31092 co-relation queries the response was YES. [2025-03-17 06:38:31,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18345 conditions, 3015 events. 2042/3015 cut-off events. For 31092/31092 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13604 event pairs, 455 based on Foata normal form. 42/3057 useless extension candidates. Maximal degree in co-relation 17373. Up to 1906 conditions per place. [2025-03-17 06:38:31,280 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 208 selfloop transitions, 179 changer transitions 0/388 dead transitions. [2025-03-17 06:38:31,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 388 transitions, 4922 flow [2025-03-17 06:38:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-17 06:38:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-17 06:38:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 308 transitions. [2025-03-17 06:38:31,286 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47384615384615386 [2025-03-17 06:38:31,286 INFO L175 Difference]: Start difference. First operand has 93 places, 116 transitions, 1419 flow. Second operand 26 states and 308 transitions. [2025-03-17 06:38:31,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 388 transitions, 4922 flow [2025-03-17 06:38:31,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 388 transitions, 4813 flow, removed 23 selfloop flow, removed 1 redundant places. [2025-03-17 06:38:31,381 INFO L231 Difference]: Finished difference. Result has 129 places, 274 transitions, 3981 flow [2025-03-17 06:38:31,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3981, PETRI_PLACES=129, PETRI_TRANSITIONS=274} [2025-03-17 06:38:31,382 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 101 predicate places. [2025-03-17 06:38:31,382 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 274 transitions, 3981 flow [2025-03-17 06:38:31,382 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) [2025-03-17 06:38:31,382 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:31,382 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:31,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 06:38:31,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:31,583 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:31,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash 969456383, now seen corresponding path program 5 times [2025-03-17 06:38:31,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:31,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708592864] [2025-03-17 06:38:31,587 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:38:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:31,591 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:31,597 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:31,597 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:31,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:31,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708592864] [2025-03-17 06:38:31,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708592864] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693073565] [2025-03-17 06:38:31,707 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:38:31,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:31,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:31,709 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) [2025-03-17 06:38:31,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:38:31,735 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:31,753 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:31,753 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:31,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:31,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:31,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:31,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:31,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693073565] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:31,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:38:31,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 13 [2025-03-17 06:38:31,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076863874] [2025-03-17 06:38:31,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:31,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:38:31,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:31,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:38:31,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:38:31,904 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:31,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 274 transitions, 3981 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:31,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:31,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:31,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:32,254 INFO L124 PetriNetUnfolderBase]: 2049/3027 cut-off events. [2025-03-17 06:38:32,254 INFO L125 PetriNetUnfolderBase]: For 38650/38650 co-relation queries the response was YES. [2025-03-17 06:38:32,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22111 conditions, 3027 events. 2049/3027 cut-off events. For 38650/38650 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13676 event pairs, 543 based on Foata normal form. 5/3032 useless extension candidates. Maximal degree in co-relation 21565. Up to 1649 conditions per place. [2025-03-17 06:38:32,278 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 287 selfloop transitions, 48 changer transitions 0/336 dead transitions. [2025-03-17 06:38:32,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 336 transitions, 5372 flow [2025-03-17 06:38:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:38:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:38:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2025-03-17 06:38:32,279 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2025-03-17 06:38:32,279 INFO L175 Difference]: Start difference. First operand has 129 places, 274 transitions, 3981 flow. Second operand 6 states and 86 transitions. [2025-03-17 06:38:32,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 336 transitions, 5372 flow [2025-03-17 06:38:32,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 336 transitions, 4316 flow, removed 528 selfloop flow, removed 0 redundant places. [2025-03-17 06:38:32,459 INFO L231 Difference]: Finished difference. Result has 136 places, 277 transitions, 3337 flow [2025-03-17 06:38:32,460 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3163, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3337, PETRI_PLACES=136, PETRI_TRANSITIONS=277} [2025-03-17 06:38:32,460 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 108 predicate places. [2025-03-17 06:38:32,460 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 277 transitions, 3337 flow [2025-03-17 06:38:32,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:32,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:32,461 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:32,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:38:32,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:32,661 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:32,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash 398285185, now seen corresponding path program 6 times [2025-03-17 06:38:32,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:32,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581308934] [2025-03-17 06:38:32,662 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:38:32,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:32,665 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:32,670 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:32,671 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:38:32,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581308934] [2025-03-17 06:38:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581308934] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192768380] [2025-03-17 06:38:32,774 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:38:32,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:32,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:32,776 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) [2025-03-17 06:38:32,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:38:32,804 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:32,829 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:32,829 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:38:32,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:32,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:32,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:32,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:32,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192768380] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:32,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:32,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2025-03-17 06:38:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000750009] [2025-03-17 06:38:32,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:32,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:38:32,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:32,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:38:32,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:38:32,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:32,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 277 transitions, 3337 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:32,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:32,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:32,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:33,926 INFO L124 PetriNetUnfolderBase]: 2956/4348 cut-off events. [2025-03-17 06:38:33,926 INFO L125 PetriNetUnfolderBase]: For 46215/46215 co-relation queries the response was YES. [2025-03-17 06:38:33,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28755 conditions, 4348 events. 2956/4348 cut-off events. For 46215/46215 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21238 event pairs, 275 based on Foata normal form. 24/4360 useless extension candidates. Maximal degree in co-relation 28070. Up to 1752 conditions per place. [2025-03-17 06:38:33,960 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 330 selfloop transitions, 260 changer transitions 2/593 dead transitions. [2025-03-17 06:38:33,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 593 transitions, 8289 flow [2025-03-17 06:38:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 06:38:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 06:38:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 265 transitions. [2025-03-17 06:38:33,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2025-03-17 06:38:33,962 INFO L175 Difference]: Start difference. First operand has 136 places, 277 transitions, 3337 flow. Second operand 21 states and 265 transitions. [2025-03-17 06:38:33,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 593 transitions, 8289 flow [2025-03-17 06:38:34,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 593 transitions, 8086 flow, removed 29 selfloop flow, removed 2 redundant places. [2025-03-17 06:38:34,138 INFO L231 Difference]: Finished difference. Result has 170 places, 433 transitions, 6624 flow [2025-03-17 06:38:34,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6624, PETRI_PLACES=170, PETRI_TRANSITIONS=433} [2025-03-17 06:38:34,139 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 142 predicate places. [2025-03-17 06:38:34,139 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 433 transitions, 6624 flow [2025-03-17 06:38:34,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:34,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:34,140 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:34,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 06:38:34,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:34,340 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:34,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:34,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1915088969, now seen corresponding path program 4 times [2025-03-17 06:38:34,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:34,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845110741] [2025-03-17 06:38:34,341 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:38:34,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:34,344 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:34,350 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:34,350 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:38:34,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:34,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:34,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845110741] [2025-03-17 06:38:34,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845110741] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:38:34,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:38:34,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:38:34,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661272316] [2025-03-17 06:38:34,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:34,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:38:34,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:34,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:38:34,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:38:34,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:34,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 433 transitions, 6624 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:34,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:34,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:34,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:35,059 INFO L124 PetriNetUnfolderBase]: 2976/4401 cut-off events. [2025-03-17 06:38:35,060 INFO L125 PetriNetUnfolderBase]: For 65958/65958 co-relation queries the response was YES. [2025-03-17 06:38:35,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33033 conditions, 4401 events. 2976/4401 cut-off events. For 65958/65958 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 21674 event pairs, 586 based on Foata normal form. 3/4392 useless extension candidates. Maximal degree in co-relation 32271. Up to 2350 conditions per place. [2025-03-17 06:38:35,093 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 413 selfloop transitions, 119 changer transitions 6/539 dead transitions. [2025-03-17 06:38:35,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 539 transitions, 8615 flow [2025-03-17 06:38:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:38:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:38:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2025-03-17 06:38:35,095 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.545 [2025-03-17 06:38:35,095 INFO L175 Difference]: Start difference. First operand has 170 places, 433 transitions, 6624 flow. Second operand 8 states and 109 transitions. [2025-03-17 06:38:35,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 539 transitions, 8615 flow [2025-03-17 06:38:35,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 539 transitions, 8235 flow, removed 190 selfloop flow, removed 0 redundant places. [2025-03-17 06:38:35,387 INFO L231 Difference]: Finished difference. Result has 179 places, 435 transitions, 6581 flow [2025-03-17 06:38:35,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6294, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6581, PETRI_PLACES=179, PETRI_TRANSITIONS=435} [2025-03-17 06:38:35,388 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 151 predicate places. [2025-03-17 06:38:35,388 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 435 transitions, 6581 flow [2025-03-17 06:38:35,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:35,388 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:35,388 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:35,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 06:38:35,388 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:35,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:35,389 INFO L85 PathProgramCache]: Analyzing trace with hash -3435031, now seen corresponding path program 7 times [2025-03-17 06:38:35,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:35,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803348978] [2025-03-17 06:38:35,389 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:38:35,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:35,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:38:35,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:35,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:35,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:35,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:35,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803348978] [2025-03-17 06:38:35,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803348978] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:35,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611971851] [2025-03-17 06:38:35,475 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:38:35,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:35,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:35,478 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) [2025-03-17 06:38:35,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:38:35,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:38:35,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:35,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:35,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:35,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:35,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:35,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:35,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611971851] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:35,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:38:35,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2025-03-17 06:38:35,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250648015] [2025-03-17 06:38:35,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:35,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:38:35,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:35,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:38:35,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:38:35,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:35,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 435 transitions, 6581 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:35,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:35,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:35,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:36,422 INFO L124 PetriNetUnfolderBase]: 3380/5014 cut-off events. [2025-03-17 06:38:36,423 INFO L125 PetriNetUnfolderBase]: For 72727/72727 co-relation queries the response was YES. [2025-03-17 06:38:36,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36988 conditions, 5014 events. 3380/5014 cut-off events. For 72727/72727 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 25458 event pairs, 468 based on Foata normal form. 15/5017 useless extension candidates. Maximal degree in co-relation 36491. Up to 1762 conditions per place. [2025-03-17 06:38:36,456 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 432 selfloop transitions, 168 changer transitions 0/601 dead transitions. [2025-03-17 06:38:36,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 601 transitions, 9778 flow [2025-03-17 06:38:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:38:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:38:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2025-03-17 06:38:36,458 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-03-17 06:38:36,458 INFO L175 Difference]: Start difference. First operand has 179 places, 435 transitions, 6581 flow. Second operand 8 states and 124 transitions. [2025-03-17 06:38:36,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 601 transitions, 9778 flow [2025-03-17 06:38:36,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 601 transitions, 9532 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-03-17 06:38:36,828 INFO L231 Difference]: Finished difference. Result has 187 places, 494 transitions, 8054 flow [2025-03-17 06:38:36,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6335, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8054, PETRI_PLACES=187, PETRI_TRANSITIONS=494} [2025-03-17 06:38:36,829 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 159 predicate places. [2025-03-17 06:38:36,829 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 494 transitions, 8054 flow [2025-03-17 06:38:36,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:36,829 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:36,829 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:36,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 06:38:37,029 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,SelfDestructingSolverStorable11 [2025-03-17 06:38:37,030 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:37,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1470579825, now seen corresponding path program 5 times [2025-03-17 06:38:37,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:37,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997547321] [2025-03-17 06:38:37,034 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:38:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:37,042 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:37,046 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:37,047 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:37,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:37,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:37,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997547321] [2025-03-17 06:38:37,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997547321] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:37,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323357939] [2025-03-17 06:38:37,203 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:38:37,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:37,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:37,205 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) [2025-03-17 06:38:37,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 06:38:37,237 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:37,258 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:37,258 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:37,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:37,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:38:37,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:37,305 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:38:37,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323357939] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:38:37,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:38:37,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-03-17 06:38:37,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825645693] [2025-03-17 06:38:37,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:37,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:38:37,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:37,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:38:37,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:38:37,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:37,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 494 transitions, 8054 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:37,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:37,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:37,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:38,252 INFO L124 PetriNetUnfolderBase]: 3504/5240 cut-off events. [2025-03-17 06:38:38,252 INFO L125 PetriNetUnfolderBase]: For 85022/85022 co-relation queries the response was YES. [2025-03-17 06:38:38,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39746 conditions, 5240 events. 3504/5240 cut-off events. For 85022/85022 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 27402 event pairs, 705 based on Foata normal form. 18/5246 useless extension candidates. Maximal degree in co-relation 39261. Up to 2964 conditions per place. [2025-03-17 06:38:38,286 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 478 selfloop transitions, 121 changer transitions 8/608 dead transitions. [2025-03-17 06:38:38,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 608 transitions, 10358 flow [2025-03-17 06:38:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:38:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:38:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2025-03-17 06:38:38,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2025-03-17 06:38:38,289 INFO L175 Difference]: Start difference. First operand has 187 places, 494 transitions, 8054 flow. Second operand 7 states and 96 transitions. [2025-03-17 06:38:38,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 608 transitions, 10358 flow [2025-03-17 06:38:38,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 608 transitions, 10172 flow, removed 35 selfloop flow, removed 2 redundant places. [2025-03-17 06:38:38,749 INFO L231 Difference]: Finished difference. Result has 195 places, 505 transitions, 8402 flow [2025-03-17 06:38:38,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7880, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8402, PETRI_PLACES=195, PETRI_TRANSITIONS=505} [2025-03-17 06:38:38,749 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 167 predicate places. [2025-03-17 06:38:38,749 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 505 transitions, 8402 flow [2025-03-17 06:38:38,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:38,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:38,750 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:38,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 06:38:38,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 06:38:38,950 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:38,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2106518903, now seen corresponding path program 1 times [2025-03-17 06:38:38,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:38,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180435232] [2025-03-17 06:38:38,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:38:38,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:38,954 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:38:38,957 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:38,958 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:38,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:39,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180435232] [2025-03-17 06:38:39,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180435232] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:38:39,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:38:39,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:38:39,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567612688] [2025-03-17 06:38:39,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:39,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:38:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:39,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:38:39,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:38:39,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:39,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 505 transitions, 8402 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:39,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:39,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:39,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:39,840 INFO L124 PetriNetUnfolderBase]: 3459/5161 cut-off events. [2025-03-17 06:38:39,840 INFO L125 PetriNetUnfolderBase]: For 85623/85623 co-relation queries the response was YES. [2025-03-17 06:38:39,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39796 conditions, 5161 events. 3459/5161 cut-off events. For 85623/85623 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 26787 event pairs, 715 based on Foata normal form. 16/5165 useless extension candidates. Maximal degree in co-relation 39289. Up to 2964 conditions per place. [2025-03-17 06:38:39,883 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 470 selfloop transitions, 114 changer transitions 15/600 dead transitions. [2025-03-17 06:38:39,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 600 transitions, 10378 flow [2025-03-17 06:38:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:38:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:38:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2025-03-17 06:38:39,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.56 [2025-03-17 06:38:39,884 INFO L175 Difference]: Start difference. First operand has 195 places, 505 transitions, 8402 flow. Second operand 7 states and 98 transitions. [2025-03-17 06:38:39,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 600 transitions, 10378 flow [2025-03-17 06:38:40,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 600 transitions, 10158 flow, removed 22 selfloop flow, removed 4 redundant places. [2025-03-17 06:38:40,401 INFO L231 Difference]: Finished difference. Result has 198 places, 502 transitions, 8383 flow [2025-03-17 06:38:40,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8383, PETRI_PLACES=198, PETRI_TRANSITIONS=502} [2025-03-17 06:38:40,402 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 170 predicate places. [2025-03-17 06:38:40,402 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 502 transitions, 8383 flow [2025-03-17 06:38:40,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:40,403 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:40,403 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:40,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 06:38:40,404 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:40,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1187405809, now seen corresponding path program 8 times [2025-03-17 06:38:40,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:40,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673693366] [2025-03-17 06:38:40,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:38:40,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:40,408 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:40,414 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:40,414 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:40,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:40,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:40,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673693366] [2025-03-17 06:38:40,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673693366] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:40,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624127933] [2025-03-17 06:38:40,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:38:40,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:40,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:40,526 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) [2025-03-17 06:38:40,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 06:38:40,555 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:40,576 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:40,576 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:40,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:40,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:40,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:40,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:40,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624127933] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:40,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:38:40,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 13 [2025-03-17 06:38:40,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961029275] [2025-03-17 06:38:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:40,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:38:40,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:40,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:38:40,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:38:40,738 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:40,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 502 transitions, 8383 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:40,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:40,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:40,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:41,540 INFO L124 PetriNetUnfolderBase]: 3444/5129 cut-off events. [2025-03-17 06:38:41,540 INFO L125 PetriNetUnfolderBase]: For 82982/82982 co-relation queries the response was YES. [2025-03-17 06:38:41,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39752 conditions, 5129 events. 3444/5129 cut-off events. For 82982/82982 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 26477 event pairs, 639 based on Foata normal form. 10/5127 useless extension candidates. Maximal degree in co-relation 39243. Up to 2363 conditions per place. [2025-03-17 06:38:41,590 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 462 selfloop transitions, 112 changer transitions 0/575 dead transitions. [2025-03-17 06:38:41,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 575 transitions, 10191 flow [2025-03-17 06:38:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:38:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:38:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2025-03-17 06:38:41,591 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2025-03-17 06:38:41,591 INFO L175 Difference]: Start difference. First operand has 198 places, 502 transitions, 8383 flow. Second operand 6 states and 87 transitions. [2025-03-17 06:38:41,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 575 transitions, 10191 flow [2025-03-17 06:38:42,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 575 transitions, 9907 flow, removed 5 selfloop flow, removed 7 redundant places. [2025-03-17 06:38:42,086 INFO L231 Difference]: Finished difference. Result has 194 places, 504 transitions, 8368 flow [2025-03-17 06:38:42,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8099, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8368, PETRI_PLACES=194, PETRI_TRANSITIONS=504} [2025-03-17 06:38:42,087 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 166 predicate places. [2025-03-17 06:38:42,087 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 504 transitions, 8368 flow [2025-03-17 06:38:42,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:42,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:42,087 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:42,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 06:38:42,287 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,SelfDestructingSolverStorable14 [2025-03-17 06:38:42,287 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:42,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1269746039, now seen corresponding path program 6 times [2025-03-17 06:38:42,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:42,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563291664] [2025-03-17 06:38:42,288 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:38:42,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:42,291 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:42,297 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:42,297 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:38:42,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:42,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:42,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563291664] [2025-03-17 06:38:42,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563291664] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:42,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683664684] [2025-03-17 06:38:42,408 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:38:42,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:42,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:42,409 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) [2025-03-17 06:38:42,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 06:38:42,438 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:42,455 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:42,455 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:38:42,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:42,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:42,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:42,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:42,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683664684] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:42,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:42,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2025-03-17 06:38:42,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207005027] [2025-03-17 06:38:42,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:42,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:38:42,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:42,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:38:42,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:38:42,680 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:42,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 504 transitions, 8368 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:42,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:42,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:42,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:43,999 INFO L124 PetriNetUnfolderBase]: 4910/7257 cut-off events. [2025-03-17 06:38:43,999 INFO L125 PetriNetUnfolderBase]: For 126938/126938 co-relation queries the response was YES. [2025-03-17 06:38:44,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57260 conditions, 7257 events. 4910/7257 cut-off events. For 126938/126938 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 39714 event pairs, 686 based on Foata normal form. 22/7262 useless extension candidates. Maximal degree in co-relation 56744. Up to 2821 conditions per place. [2025-03-17 06:38:44,061 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 721 selfloop transitions, 208 changer transitions 0/930 dead transitions. [2025-03-17 06:38:44,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 930 transitions, 16091 flow [2025-03-17 06:38:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 06:38:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 06:38:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 235 transitions. [2025-03-17 06:38:44,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2025-03-17 06:38:44,063 INFO L175 Difference]: Start difference. First operand has 194 places, 504 transitions, 8368 flow. Second operand 19 states and 235 transitions. [2025-03-17 06:38:44,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 930 transitions, 16091 flow [2025-03-17 06:38:44,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 930 transitions, 15893 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-03-17 06:38:44,774 INFO L231 Difference]: Finished difference. Result has 221 places, 577 transitions, 10242 flow [2025-03-17 06:38:44,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8249, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10242, PETRI_PLACES=221, PETRI_TRANSITIONS=577} [2025-03-17 06:38:44,775 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 193 predicate places. [2025-03-17 06:38:44,775 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 577 transitions, 10242 flow [2025-03-17 06:38:44,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:44,775 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:44,775 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:44,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 06:38:44,975 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,SelfDestructingSolverStorable15 [2025-03-17 06:38:44,975 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:44,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1335251825, now seen corresponding path program 9 times [2025-03-17 06:38:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:44,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249056712] [2025-03-17 06:38:44,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:38:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:44,978 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:44,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:44,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:38:44,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:45,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:45,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249056712] [2025-03-17 06:38:45,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249056712] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:45,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474898180] [2025-03-17 06:38:45,065 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:38:45,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:45,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:45,067 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) [2025-03-17 06:38:45,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 06:38:45,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:45,106 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:45,107 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:38:45,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:45,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:45,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:45,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:45,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474898180] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:45,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:38:45,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 12 [2025-03-17 06:38:45,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837538125] [2025-03-17 06:38:45,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:45,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:38:45,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:45,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:38:45,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:38:45,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:45,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 577 transitions, 10242 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:45,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:45,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:45,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:46,135 INFO L124 PetriNetUnfolderBase]: 4863/7183 cut-off events. [2025-03-17 06:38:46,135 INFO L125 PetriNetUnfolderBase]: For 143648/143648 co-relation queries the response was YES. [2025-03-17 06:38:46,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61432 conditions, 7183 events. 4863/7183 cut-off events. For 143648/143648 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 38930 event pairs, 869 based on Foata normal form. 41/7207 useless extension candidates. Maximal degree in co-relation 61072. Up to 3911 conditions per place. [2025-03-17 06:38:46,206 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 540 selfloop transitions, 119 changer transitions 0/660 dead transitions. [2025-03-17 06:38:46,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 660 transitions, 12513 flow [2025-03-17 06:38:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:38:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:38:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2025-03-17 06:38:46,207 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2025-03-17 06:38:46,207 INFO L175 Difference]: Start difference. First operand has 221 places, 577 transitions, 10242 flow. Second operand 6 states and 85 transitions. [2025-03-17 06:38:46,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 660 transitions, 12513 flow [2025-03-17 06:38:47,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 660 transitions, 12156 flow, removed 94 selfloop flow, removed 5 redundant places. [2025-03-17 06:38:47,141 INFO L231 Difference]: Finished difference. Result has 224 places, 582 transitions, 10348 flow [2025-03-17 06:38:47,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=9904, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10348, PETRI_PLACES=224, PETRI_TRANSITIONS=582} [2025-03-17 06:38:47,142 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 196 predicate places. [2025-03-17 06:38:47,142 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 582 transitions, 10348 flow [2025-03-17 06:38:47,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:47,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:47,142 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:47,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 06:38:47,342 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,SelfDestructingSolverStorable16 [2025-03-17 06:38:47,342 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:47,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1919821751, now seen corresponding path program 10 times [2025-03-17 06:38:47,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:47,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456629055] [2025-03-17 06:38:47,343 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:38:47,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:47,345 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:47,348 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:47,348 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:38:47,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:47,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:47,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456629055] [2025-03-17 06:38:47,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456629055] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:47,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357218367] [2025-03-17 06:38:47,424 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:38:47,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:47,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:47,426 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) [2025-03-17 06:38:47,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 06:38:47,461 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:47,482 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:47,482 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:38:47,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:47,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:38:47,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:47,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:47,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357218367] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:47,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:38:47,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2025-03-17 06:38:47,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211034406] [2025-03-17 06:38:47,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:38:47,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:38:47,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:47,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:38:47,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2025-03-17 06:38:47,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:47,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 582 transitions, 10348 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:47,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:47,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:47,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:48,741 INFO L124 PetriNetUnfolderBase]: 4836/7113 cut-off events. [2025-03-17 06:38:48,742 INFO L125 PetriNetUnfolderBase]: For 140181/140181 co-relation queries the response was YES. [2025-03-17 06:38:48,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61421 conditions, 7113 events. 4836/7113 cut-off events. For 140181/140181 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 38205 event pairs, 870 based on Foata normal form. 20/7116 useless extension candidates. Maximal degree in co-relation 61108. Up to 3923 conditions per place. [2025-03-17 06:38:48,814 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 546 selfloop transitions, 108 changer transitions 0/655 dead transitions. [2025-03-17 06:38:48,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 655 transitions, 12443 flow [2025-03-17 06:38:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:38:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:38:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2025-03-17 06:38:48,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2025-03-17 06:38:48,815 INFO L175 Difference]: Start difference. First operand has 224 places, 582 transitions, 10348 flow. Second operand 6 states and 86 transitions. [2025-03-17 06:38:48,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 655 transitions, 12443 flow [2025-03-17 06:38:49,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 655 transitions, 12373 flow, removed 11 selfloop flow, removed 1 redundant places. [2025-03-17 06:38:49,821 INFO L231 Difference]: Finished difference. Result has 228 places, 582 transitions, 10494 flow [2025-03-17 06:38:49,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10278, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10494, PETRI_PLACES=228, PETRI_TRANSITIONS=582} [2025-03-17 06:38:49,821 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 200 predicate places. [2025-03-17 06:38:49,821 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 582 transitions, 10494 flow [2025-03-17 06:38:49,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:49,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:49,822 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:49,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 06:38:50,022 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,SelfDestructingSolverStorable17 [2025-03-17 06:38:50,022 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:50,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash 266197907, now seen corresponding path program 7 times [2025-03-17 06:38:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:50,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865167895] [2025-03-17 06:38:50,023 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:38:50,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:50,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:38:50,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:50,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:50,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:50,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:50,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865167895] [2025-03-17 06:38:50,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865167895] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:50,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295940559] [2025-03-17 06:38:50,089 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:38:50,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:50,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:50,091 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) [2025-03-17 06:38:50,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 06:38:50,121 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:38:50,155 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:50,155 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:50,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:50,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:50,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:50,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295940559] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:50,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:50,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2025-03-17 06:38:50,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694525080] [2025-03-17 06:38:50,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:50,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:38:50,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:50,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:38:50,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:38:50,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:50,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 582 transitions, 10494 flow. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 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) [2025-03-17 06:38:50,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:50,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:50,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:51,829 INFO L124 PetriNetUnfolderBase]: 4862/7152 cut-off events. [2025-03-17 06:38:51,829 INFO L125 PetriNetUnfolderBase]: For 148119/148119 co-relation queries the response was YES. [2025-03-17 06:38:51,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62420 conditions, 7152 events. 4862/7152 cut-off events. For 148119/148119 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 38791 event pairs, 671 based on Foata normal form. 24/7156 useless extension candidates. Maximal degree in co-relation 62174. Up to 2719 conditions per place. [2025-03-17 06:38:51,885 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 740 selfloop transitions, 202 changer transitions 0/943 dead transitions. [2025-03-17 06:38:51,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 943 transitions, 17677 flow [2025-03-17 06:38:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 06:38:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-17 06:38:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 226 transitions. [2025-03-17 06:38:51,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5022222222222222 [2025-03-17 06:38:51,887 INFO L175 Difference]: Start difference. First operand has 228 places, 582 transitions, 10494 flow. Second operand 18 states and 226 transitions. [2025-03-17 06:38:51,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 943 transitions, 17677 flow [2025-03-17 06:38:52,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 943 transitions, 17318 flow, removed 18 selfloop flow, removed 4 redundant places. [2025-03-17 06:38:52,731 INFO L231 Difference]: Finished difference. Result has 252 places, 617 transitions, 11488 flow [2025-03-17 06:38:52,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10204, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11488, PETRI_PLACES=252, PETRI_TRANSITIONS=617} [2025-03-17 06:38:52,731 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 224 predicate places. [2025-03-17 06:38:52,731 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 617 transitions, 11488 flow [2025-03-17 06:38:52,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 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) [2025-03-17 06:38:52,731 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:52,732 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:52,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 06:38:52,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:52,932 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:52,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1722289033, now seen corresponding path program 11 times [2025-03-17 06:38:52,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:52,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958343287] [2025-03-17 06:38:52,933 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:38:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:52,935 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:52,938 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:52,938 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:52,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:53,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958343287] [2025-03-17 06:38:53,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958343287] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:53,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30281958] [2025-03-17 06:38:53,029 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:38:53,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:53,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:53,031 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) [2025-03-17 06:38:53,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 06:38:53,059 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:53,073 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:53,074 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:38:53,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:53,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:38:53,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:53,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:53,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30281958] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:53,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:53,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2025-03-17 06:38:53,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975891115] [2025-03-17 06:38:53,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:53,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:38:53,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:53,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:38:53,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:38:53,308 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:53,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 617 transitions, 11488 flow. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 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) [2025-03-17 06:38:53,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:53,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:53,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:55,622 INFO L124 PetriNetUnfolderBase]: 6186/9305 cut-off events. [2025-03-17 06:38:55,623 INFO L125 PetriNetUnfolderBase]: For 200600/200600 co-relation queries the response was YES. [2025-03-17 06:38:55,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82535 conditions, 9305 events. 6186/9305 cut-off events. For 200600/200600 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 54845 event pairs, 896 based on Foata normal form. 45/9350 useless extension candidates. Maximal degree in co-relation 82146. Up to 4191 conditions per place. [2025-03-17 06:38:55,729 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 543 selfloop transitions, 551 changer transitions 1/1096 dead transitions. [2025-03-17 06:38:55,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1096 transitions, 21201 flow [2025-03-17 06:38:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-17 06:38:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-17 06:38:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 324 transitions. [2025-03-17 06:38:55,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5184 [2025-03-17 06:38:55,730 INFO L175 Difference]: Start difference. First operand has 252 places, 617 transitions, 11488 flow. Second operand 25 states and 324 transitions. [2025-03-17 06:38:55,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1096 transitions, 21201 flow [2025-03-17 06:38:57,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1096 transitions, 20796 flow, removed 29 selfloop flow, removed 4 redundant places. [2025-03-17 06:38:57,416 INFO L231 Difference]: Finished difference. Result has 288 places, 880 transitions, 18615 flow [2025-03-17 06:38:57,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11168, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=18615, PETRI_PLACES=288, PETRI_TRANSITIONS=880} [2025-03-17 06:38:57,417 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 260 predicate places. [2025-03-17 06:38:57,417 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 880 transitions, 18615 flow [2025-03-17 06:38:57,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 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) [2025-03-17 06:38:57,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:57,417 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:38:57,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-17 06:38:57,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:57,617 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:38:57,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1460201889, now seen corresponding path program 12 times [2025-03-17 06:38:57,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:57,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366286677] [2025-03-17 06:38:57,618 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:38:57,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:57,621 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:57,630 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:57,630 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:38:57,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:57,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366286677] [2025-03-17 06:38:57,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366286677] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580815899] [2025-03-17 06:38:57,739 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:38:57,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:57,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:57,743 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:38:57,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 06:38:57,774 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:38:57,800 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:38:57,800 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:38:57,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:57,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 06:38:57,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:57,940 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:58,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580815899] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:58,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:58,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2025-03-17 06:38:58,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131134895] [2025-03-17 06:38:58,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:58,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 06:38:58,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:58,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 06:38:58,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:38:58,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:38:58,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 880 transitions, 18615 flow. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 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) [2025-03-17 06:38:58,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:58,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:38:58,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:39:00,826 INFO L124 PetriNetUnfolderBase]: 6789/10337 cut-off events. [2025-03-17 06:39:00,826 INFO L125 PetriNetUnfolderBase]: For 278332/278332 co-relation queries the response was YES. [2025-03-17 06:39:00,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100606 conditions, 10337 events. 6789/10337 cut-off events. For 278332/278332 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 63455 event pairs, 1093 based on Foata normal form. 26/10363 useless extension candidates. Maximal degree in co-relation 100209. Up to 5015 conditions per place. [2025-03-17 06:39:00,945 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 560 selfloop transitions, 632 changer transitions 0/1193 dead transitions. [2025-03-17 06:39:00,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1193 transitions, 26362 flow [2025-03-17 06:39:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 06:39:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 06:39:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 273 transitions. [2025-03-17 06:39:00,947 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-03-17 06:39:00,947 INFO L175 Difference]: Start difference. First operand has 288 places, 880 transitions, 18615 flow. Second operand 21 states and 273 transitions. [2025-03-17 06:39:00,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1193 transitions, 26362 flow [2025-03-17 06:39:03,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1193 transitions, 24746 flow, removed 547 selfloop flow, removed 6 redundant places. [2025-03-17 06:39:03,651 INFO L231 Difference]: Finished difference. Result has 309 places, 988 transitions, 21457 flow [2025-03-17 06:39:03,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=17267, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=21457, PETRI_PLACES=309, PETRI_TRANSITIONS=988} [2025-03-17 06:39:03,652 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 281 predicate places. [2025-03-17 06:39:03,652 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 988 transitions, 21457 flow [2025-03-17 06:39:03,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 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) [2025-03-17 06:39:03,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:39:03,652 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:39:03,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-17 06:39:03,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:03,852 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:39:03,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:39:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1573156961, now seen corresponding path program 2 times [2025-03-17 06:39:03,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:39:03,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795046861] [2025-03-17 06:39:03,853 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:39:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:39:03,856 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:03,859 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:03,859 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:39:03,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:03,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:39:03,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795046861] [2025-03-17 06:39:03,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795046861] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:39:03,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759521182] [2025-03-17 06:39:03,950 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:39:03,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:03,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:39:03,952 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:39:03,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 06:39:03,981 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:04,001 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:04,001 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:39:04,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:04,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:39:04,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:39:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:04,043 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:39:04,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759521182] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:39:04,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:39:04,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-03-17 06:39:04,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791355377] [2025-03-17 06:39:04,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:39:04,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:39:04,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:39:04,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:39:04,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:39:04,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:39:04,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 988 transitions, 21457 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:04,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:39:04,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:39:04,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:39:06,396 INFO L124 PetriNetUnfolderBase]: 6790/10372 cut-off events. [2025-03-17 06:39:06,396 INFO L125 PetriNetUnfolderBase]: For 280315/280315 co-relation queries the response was YES. [2025-03-17 06:39:06,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100713 conditions, 10372 events. 6790/10372 cut-off events. For 280315/280315 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 63988 event pairs, 1782 based on Foata normal form. 24/10396 useless extension candidates. Maximal degree in co-relation 100309. Up to 9310 conditions per place. [2025-03-17 06:39:06,542 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 892 selfloop transitions, 151 changer transitions 12/1056 dead transitions. [2025-03-17 06:39:06,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1056 transitions, 24246 flow [2025-03-17 06:39:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:39:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:39:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2025-03-17 06:39:06,543 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2025-03-17 06:39:06,543 INFO L175 Difference]: Start difference. First operand has 309 places, 988 transitions, 21457 flow. Second operand 7 states and 94 transitions. [2025-03-17 06:39:06,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1056 transitions, 24246 flow [2025-03-17 06:39:09,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 1056 transitions, 23190 flow, removed 267 selfloop flow, removed 7 redundant places. [2025-03-17 06:39:09,627 INFO L231 Difference]: Finished difference. Result has 311 places, 987 transitions, 20712 flow [2025-03-17 06:39:09,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=20377, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20712, PETRI_PLACES=311, PETRI_TRANSITIONS=987} [2025-03-17 06:39:09,628 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 283 predicate places. [2025-03-17 06:39:09,628 INFO L471 AbstractCegarLoop]: Abstraction has has 311 places, 987 transitions, 20712 flow [2025-03-17 06:39:09,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:09,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:39:09,629 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:39:09,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-17 06:39:09,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:09,833 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:39:09,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:39:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1047278413, now seen corresponding path program 8 times [2025-03-17 06:39:09,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:39:09,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471985612] [2025-03-17 06:39:09,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:39:09,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:39:09,837 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:09,841 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:09,841 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:39:09,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:09,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:39:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471985612] [2025-03-17 06:39:09,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471985612] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:39:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623166439] [2025-03-17 06:39:09,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:39:09,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:39:09,937 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:39:09,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 06:39:09,964 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:09,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:09,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:39:09,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:09,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:39:09,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:39:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:10,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:39:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:10,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623166439] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:39:10,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:39:10,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2025-03-17 06:39:10,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412238488] [2025-03-17 06:39:10,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:39:10,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:39:10,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:39:10,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:39:10,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:39:10,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:39:10,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 987 transitions, 20712 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 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) [2025-03-17 06:39:10,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:39:10,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:39:10,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:39:12,815 INFO L124 PetriNetUnfolderBase]: 7273/11013 cut-off events. [2025-03-17 06:39:12,815 INFO L125 PetriNetUnfolderBase]: For 280572/280572 co-relation queries the response was YES. [2025-03-17 06:39:12,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104795 conditions, 11013 events. 7273/11013 cut-off events. For 280572/280572 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 67946 event pairs, 1524 based on Foata normal form. 15/11028 useless extension candidates. Maximal degree in co-relation 104503. Up to 8634 conditions per place. [2025-03-17 06:39:12,948 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 959 selfloop transitions, 359 changer transitions 0/1319 dead transitions. [2025-03-17 06:39:12,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1319 transitions, 28818 flow [2025-03-17 06:39:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 06:39:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 06:39:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 244 transitions. [2025-03-17 06:39:12,949 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5136842105263157 [2025-03-17 06:39:12,949 INFO L175 Difference]: Start difference. First operand has 311 places, 987 transitions, 20712 flow. Second operand 19 states and 244 transitions. [2025-03-17 06:39:12,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 1319 transitions, 28818 flow [2025-03-17 06:39:15,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 1319 transitions, 28502 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-03-17 06:39:15,951 INFO L231 Difference]: Finished difference. Result has 336 places, 1093 transitions, 23939 flow [2025-03-17 06:39:15,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=20408, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=23939, PETRI_PLACES=336, PETRI_TRANSITIONS=1093} [2025-03-17 06:39:15,952 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 308 predicate places. [2025-03-17 06:39:15,952 INFO L471 AbstractCegarLoop]: Abstraction has has 336 places, 1093 transitions, 23939 flow [2025-03-17 06:39:15,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 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) [2025-03-17 06:39:15,952 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:39:15,952 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:39:15,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-17 06:39:16,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:16,153 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:39:16,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:39:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1988003363, now seen corresponding path program 13 times [2025-03-17 06:39:16,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:39:16,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120362754] [2025-03-17 06:39:16,154 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:39:16,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:39:16,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:39:16,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:16,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:39:16,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:16,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:39:16,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120362754] [2025-03-17 06:39:16,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120362754] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:39:16,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:39:16,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:39:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356278903] [2025-03-17 06:39:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:39:16,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:39:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:39:16,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:39:16,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:39:16,271 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:39:16,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1093 transitions, 23939 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:16,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:39:16,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:39:16,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:39:19,171 INFO L124 PetriNetUnfolderBase]: 7279/11023 cut-off events. [2025-03-17 06:39:19,171 INFO L125 PetriNetUnfolderBase]: For 303511/303511 co-relation queries the response was YES. [2025-03-17 06:39:19,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109276 conditions, 11023 events. 7279/11023 cut-off events. For 303511/303511 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 67596 event pairs, 1794 based on Foata normal form. 2/11025 useless extension candidates. Maximal degree in co-relation 108839. Up to 10076 conditions per place. [2025-03-17 06:39:19,328 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 972 selfloop transitions, 173 changer transitions 2/1148 dead transitions. [2025-03-17 06:39:19,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1148 transitions, 26938 flow [2025-03-17 06:39:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:39:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:39:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2025-03-17 06:39:19,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2025-03-17 06:39:19,329 INFO L175 Difference]: Start difference. First operand has 336 places, 1093 transitions, 23939 flow. Second operand 7 states and 82 transitions. [2025-03-17 06:39:19,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1148 transitions, 26938 flow [2025-03-17 06:39:23,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1148 transitions, 26243 flow, removed 253 selfloop flow, removed 2 redundant places. [2025-03-17 06:39:23,276 INFO L231 Difference]: Finished difference. Result has 342 places, 1097 transitions, 23724 flow [2025-03-17 06:39:23,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=23260, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23724, PETRI_PLACES=342, PETRI_TRANSITIONS=1097} [2025-03-17 06:39:23,277 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 314 predicate places. [2025-03-17 06:39:23,277 INFO L471 AbstractCegarLoop]: Abstraction has has 342 places, 1097 transitions, 23724 flow [2025-03-17 06:39:23,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:23,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:39:23,277 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:39:23,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-17 06:39:23,278 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:39:23,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:39:23,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1207912907, now seen corresponding path program 9 times [2025-03-17 06:39:23,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:39:23,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838949008] [2025-03-17 06:39:23,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:39:23,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:39:23,281 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:23,284 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:23,284 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:39:23,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:23,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:39:23,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838949008] [2025-03-17 06:39:23,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838949008] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:39:23,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797868410] [2025-03-17 06:39:23,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:39:23,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:23,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:39:23,365 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:39:23,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 06:39:23,392 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:23,409 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:23,409 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:39:23,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:23,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:39:23,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:39:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:23,463 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:39:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797868410] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:39:23,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:39:23,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-03-17 06:39:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30069292] [2025-03-17 06:39:23,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:39:23,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:39:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:39:23,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:39:23,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:39:23,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:39:23,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 1097 transitions, 23724 flow. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:23,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:39:23,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:39:23,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:39:26,345 INFO L124 PetriNetUnfolderBase]: 7306/11045 cut-off events. [2025-03-17 06:39:26,346 INFO L125 PetriNetUnfolderBase]: For 290419/290419 co-relation queries the response was YES. [2025-03-17 06:39:26,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108043 conditions, 11045 events. 7306/11045 cut-off events. For 290419/290419 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 67865 event pairs, 1539 based on Foata normal form. 62/11107 useless extension candidates. Maximal degree in co-relation 107603. Up to 8682 conditions per place. [2025-03-17 06:39:26,512 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 988 selfloop transitions, 377 changer transitions 0/1366 dead transitions. [2025-03-17 06:39:26,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1366 transitions, 30773 flow [2025-03-17 06:39:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 06:39:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 06:39:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 239 transitions. [2025-03-17 06:39:26,514 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5031578947368421 [2025-03-17 06:39:26,514 INFO L175 Difference]: Start difference. First operand has 342 places, 1097 transitions, 23724 flow. Second operand 19 states and 239 transitions. [2025-03-17 06:39:26,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1366 transitions, 30773 flow [2025-03-17 06:39:30,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1366 transitions, 30419 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-03-17 06:39:30,123 INFO L231 Difference]: Finished difference. Result has 359 places, 1131 transitions, 24969 flow [2025-03-17 06:39:30,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=23313, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=24969, PETRI_PLACES=359, PETRI_TRANSITIONS=1131} [2025-03-17 06:39:30,124 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 331 predicate places. [2025-03-17 06:39:30,124 INFO L471 AbstractCegarLoop]: Abstraction has has 359 places, 1131 transitions, 24969 flow [2025-03-17 06:39:30,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:30,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:39:30,125 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:39:30,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-17 06:39:30,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:30,325 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:39:30,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:39:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash -977453961, now seen corresponding path program 14 times [2025-03-17 06:39:30,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:39:30,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148130717] [2025-03-17 06:39:30,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:39:30,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:39:30,328 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:30,331 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:30,331 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:39:30,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:30,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:39:30,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148130717] [2025-03-17 06:39:30,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148130717] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:39:30,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225973839] [2025-03-17 06:39:30,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:39:30,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:30,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:39:30,425 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:39:30,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 06:39:30,453 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:30,472 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:30,472 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:39:30,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:30,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:39:30,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:39:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:30,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:39:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225973839] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:39:30,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:39:30,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2025-03-17 06:39:30,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800520123] [2025-03-17 06:39:30,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:39:30,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:39:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:39:30,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:39:30,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:39:30,606 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:39:30,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1131 transitions, 24969 flow. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 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) [2025-03-17 06:39:30,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:39:30,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:39:30,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:39:33,676 INFO L124 PetriNetUnfolderBase]: 7324/11080 cut-off events. [2025-03-17 06:39:33,676 INFO L125 PetriNetUnfolderBase]: For 300365/300365 co-relation queries the response was YES. [2025-03-17 06:39:33,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110506 conditions, 11080 events. 7324/11080 cut-off events. For 300365/300365 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 68080 event pairs, 1467 based on Foata normal form. 23/11103 useless extension candidates. Maximal degree in co-relation 110062. Up to 8871 conditions per place. [2025-03-17 06:39:33,823 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 841 selfloop transitions, 449 changer transitions 0/1291 dead transitions. [2025-03-17 06:39:33,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1291 transitions, 29818 flow [2025-03-17 06:39:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 06:39:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-17 06:39:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 209 transitions. [2025-03-17 06:39:33,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49176470588235294 [2025-03-17 06:39:33,824 INFO L175 Difference]: Start difference. First operand has 359 places, 1131 transitions, 24969 flow. Second operand 17 states and 209 transitions. [2025-03-17 06:39:33,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1291 transitions, 29818 flow [2025-03-17 06:39:37,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1291 transitions, 29230 flow, removed 69 selfloop flow, removed 7 redundant places. [2025-03-17 06:39:37,711 INFO L231 Difference]: Finished difference. Result has 374 places, 1165 transitions, 26277 flow [2025-03-17 06:39:37,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=24390, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=26277, PETRI_PLACES=374, PETRI_TRANSITIONS=1165} [2025-03-17 06:39:37,712 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 346 predicate places. [2025-03-17 06:39:37,712 INFO L471 AbstractCegarLoop]: Abstraction has has 374 places, 1165 transitions, 26277 flow [2025-03-17 06:39:37,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 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) [2025-03-17 06:39:37,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:39:37,712 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:39:37,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-17 06:39:37,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-17 06:39:37,916 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:39:37,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:39:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1268605617, now seen corresponding path program 15 times [2025-03-17 06:39:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:39:37,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334599606] [2025-03-17 06:39:37,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:39:37,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:39:37,919 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:37,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:37,922 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:39:37,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:37,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:39:37,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334599606] [2025-03-17 06:39:37,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334599606] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:39:37,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224151451] [2025-03-17 06:39:37,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:39:37,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:37,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:39:37,999 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:39:37,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 06:39:38,022 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:38,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:38,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:39:38,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:38,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:39:38,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:39:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:38,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:39:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:38,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224151451] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:39:38,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:39:38,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2025-03-17 06:39:38,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813271536] [2025-03-17 06:39:38,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:39:38,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:39:38,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:39:38,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:39:38,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:39:38,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:39:38,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1165 transitions, 26277 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:38,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:39:38,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:39:38,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:39:41,439 INFO L124 PetriNetUnfolderBase]: 8152/12120 cut-off events. [2025-03-17 06:39:41,440 INFO L125 PetriNetUnfolderBase]: For 343735/343735 co-relation queries the response was YES. [2025-03-17 06:39:41,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123492 conditions, 12120 events. 8152/12120 cut-off events. For 343735/343735 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 73191 event pairs, 1490 based on Foata normal form. 42/12162 useless extension candidates. Maximal degree in co-relation 123042. Up to 9340 conditions per place. [2025-03-17 06:39:41,615 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 961 selfloop transitions, 595 changer transitions 0/1557 dead transitions. [2025-03-17 06:39:41,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1557 transitions, 36686 flow [2025-03-17 06:39:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 06:39:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 06:39:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 247 transitions. [2025-03-17 06:39:41,616 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-03-17 06:39:41,616 INFO L175 Difference]: Start difference. First operand has 374 places, 1165 transitions, 26277 flow. Second operand 19 states and 247 transitions. [2025-03-17 06:39:41,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1557 transitions, 36686 flow [2025-03-17 06:39:45,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1557 transitions, 36060 flow, removed 156 selfloop flow, removed 3 redundant places. [2025-03-17 06:39:46,017 INFO L231 Difference]: Finished difference. Result has 397 places, 1357 transitions, 31918 flow [2025-03-17 06:39:46,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=25769, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=31918, PETRI_PLACES=397, PETRI_TRANSITIONS=1357} [2025-03-17 06:39:46,019 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 369 predicate places. [2025-03-17 06:39:46,019 INFO L471 AbstractCegarLoop]: Abstraction has has 397 places, 1357 transitions, 31918 flow [2025-03-17 06:39:46,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:46,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:39:46,019 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:39:46,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-17 06:39:46,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-17 06:39:46,219 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:39:46,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:39:46,220 INFO L85 PathProgramCache]: Analyzing trace with hash 471684999, now seen corresponding path program 3 times [2025-03-17 06:39:46,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:39:46,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556008646] [2025-03-17 06:39:46,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:39:46,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:39:46,223 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:46,227 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:46,228 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:39:46,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:46,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:39:46,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556008646] [2025-03-17 06:39:46,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556008646] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:39:46,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868160104] [2025-03-17 06:39:46,327 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:39:46,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:39:46,329 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:39:46,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-17 06:39:46,357 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:46,383 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:46,383 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:39:46,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:46,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:39:46,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:39:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:46,418 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:39:46,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868160104] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:39:46,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:39:46,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-03-17 06:39:46,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828859487] [2025-03-17 06:39:46,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:39:46,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:39:46,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:39:46,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:39:46,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:39:46,419 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:39:46,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1357 transitions, 31918 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:46,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:39:46,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:39:46,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:39:49,706 INFO L124 PetriNetUnfolderBase]: 8134/12091 cut-off events. [2025-03-17 06:39:49,707 INFO L125 PetriNetUnfolderBase]: For 366100/366100 co-relation queries the response was YES. [2025-03-17 06:39:49,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129047 conditions, 12091 events. 8134/12091 cut-off events. For 366100/366100 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 72799 event pairs, 1922 based on Foata normal form. 12/12103 useless extension candidates. Maximal degree in co-relation 128588. Up to 11098 conditions per place. [2025-03-17 06:39:49,879 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 1240 selfloop transitions, 154 changer transitions 15/1410 dead transitions. [2025-03-17 06:39:49,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1410 transitions, 35239 flow [2025-03-17 06:39:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:39:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:39:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2025-03-17 06:39:49,880 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2025-03-17 06:39:49,880 INFO L175 Difference]: Start difference. First operand has 397 places, 1357 transitions, 31918 flow. Second operand 7 states and 92 transitions. [2025-03-17 06:39:49,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1410 transitions, 35239 flow [2025-03-17 06:39:54,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1410 transitions, 34434 flow, removed 278 selfloop flow, removed 5 redundant places. [2025-03-17 06:39:54,784 INFO L231 Difference]: Finished difference. Result has 399 places, 1351 transitions, 31275 flow [2025-03-17 06:39:54,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=31040, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=31275, PETRI_PLACES=399, PETRI_TRANSITIONS=1351} [2025-03-17 06:39:54,789 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 371 predicate places. [2025-03-17 06:39:54,789 INFO L471 AbstractCegarLoop]: Abstraction has has 399 places, 1351 transitions, 31275 flow [2025-03-17 06:39:54,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:54,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:39:54,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:39:54,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-17 06:39:54,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-17 06:39:54,990 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:39:54,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:39:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash -201115969, now seen corresponding path program 16 times [2025-03-17 06:39:54,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:39:54,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625465458] [2025-03-17 06:39:54,991 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:39:54,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:39:54,993 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:54,998 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:54,999 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:39:54,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:55,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:39:55,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625465458] [2025-03-17 06:39:55,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625465458] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:39:55,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631488142] [2025-03-17 06:39:55,066 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:39:55,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:39:55,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:39:55,068 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:39:55,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-17 06:39:55,098 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-17 06:39:55,120 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:39:55,120 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:39:55,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:39:55,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 06:39:55,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:39:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:55,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:39:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:39:55,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631488142] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:39:55,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:39:55,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-17 06:39:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751880960] [2025-03-17 06:39:55,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:39:55,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:39:55,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:39:55,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:39:55,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:39:55,321 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-17 06:39:55,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 1351 transitions, 31275 flow. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:39:55,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:39:55,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-17 06:39:55,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand