./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longest-1.i --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/pthread/triangular-longest-1.i -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 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:19:37,966 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:19:38,012 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:19:38,018 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:19:38,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:19:38,042 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:19:38,042 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:19:38,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:19:38,043 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:19:38,043 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:19:38,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:19:38,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:19:38,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:19:38,044 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:19:38,044 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:19:38,044 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:19:38,044 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:19:38,044 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:19:38,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:19:38,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:19:38,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:19:38,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:19:38,044 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:19:38,045 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:19:38,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:19:38,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:19:38,046 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:19:38,046 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:19:38,046 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:19:38,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:19:38,046 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 -> 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 [2025-03-17 06:19:38,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:19:38,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:19:38,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:19:38,314 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:19:38,315 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:19:38,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longest-1.i [2025-03-17 06:19:39,480 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b954bda5/6943b195de274c8587879d8be0b8c80e/FLAG5911bd9f8 [2025-03-17 06:19:39,747 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:19:39,748 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-1.i [2025-03-17 06:19:39,759 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b954bda5/6943b195de274c8587879d8be0b8c80e/FLAG5911bd9f8 [2025-03-17 06:19:39,770 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b954bda5/6943b195de274c8587879d8be0b8c80e [2025-03-17 06:19:39,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:19:39,772 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:19:39,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:19:39,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:19:39,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:19:39,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:19:39" (1/1) ... [2025-03-17 06:19:39,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5319e4e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:39, skipping insertion in model container [2025-03-17 06:19:39,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:19:39" (1/1) ... [2025-03-17 06:19:39,800 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:19:40,051 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/pthread/triangular-longest-1.i[30962,30975] [2025-03-17 06:19:40,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:19:40,063 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:19:40,093 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/pthread/triangular-longest-1.i[30962,30975] [2025-03-17 06:19:40,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:19:40,121 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:19:40,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40 WrapperNode [2025-03-17 06:19:40,123 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:19:40,124 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:19:40,124 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:19:40,124 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:19:40,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,154 INFO L138 Inliner]: procedures = 168, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2025-03-17 06:19:40,155 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:19:40,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:19:40,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:19:40,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:19:40,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,163 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,174 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 06:19:40,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,176 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,178 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:19:40,181 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:19:40,182 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:19:40,183 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:19:40,183 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (1/1) ... [2025-03-17 06:19:40,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:19:40,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:40,209 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 06:19:40,211 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 06:19:40,228 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-17 06:19:40,229 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-17 06:19:40,229 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-17 06:19:40,229 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-17 06:19:40,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:19:40,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:19:40,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:19:40,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:19:40,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:19:40,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:19:40,230 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 06:19:40,314 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:19:40,315 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:19:40,409 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:19:40,409 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:19:40,469 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:19:40,469 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:19:40,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:19:40 BoogieIcfgContainer [2025-03-17 06:19:40,470 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:19:40,472 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:19:40,472 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:19:40,475 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:19:40,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:19:39" (1/3) ... [2025-03-17 06:19:40,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f189bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:19:40, skipping insertion in model container [2025-03-17 06:19:40,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:40" (2/3) ... [2025-03-17 06:19:40,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f189bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:19:40, skipping insertion in model container [2025-03-17 06:19:40,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:19:40" (3/3) ... [2025-03-17 06:19:40,479 INFO L128 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2025-03-17 06:19:40,489 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:19:40,491 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG triangular-longest-1.i that has 3 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-17 06:19:40,491 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:19:40,531 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:19:40,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2025-03-17 06:19:40,580 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-17 06:19:40,581 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:19:40,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2025-03-17 06:19:40,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2025-03-17 06:19:40,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2025-03-17 06:19:40,598 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:19:40,606 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;@5483cbe0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:19:40,606 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-17 06:19:40,611 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:19:40,611 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-17 06:19:40,611 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:19:40,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:40,612 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:40,612 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:40,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash 355335699, now seen corresponding path program 1 times [2025-03-17 06:19:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965143971] [2025-03-17 06:19:40,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:40,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 06:19:40,698 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 06:19:40,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:40,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:40,930 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 06:19:40,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:40,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965143971] [2025-03-17 06:19:40,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965143971] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:40,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:40,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:19:40,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84315626] [2025-03-17 06:19:40,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:40,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:19:40,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:40,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:19:40,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:19:40,966 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:40,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 06:19:40,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:40,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:40,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:41,211 INFO L124 PetriNetUnfolderBase]: 321/540 cut-off events. [2025-03-17 06:19:41,211 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:19:41,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 540 events. 321/540 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2120 event pairs, 62 based on Foata normal form. 12/535 useless extension candidates. Maximal degree in co-relation 1042. Up to 221 conditions per place. [2025-03-17 06:19:41,216 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2025-03-17 06:19:41,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2025-03-17 06:19:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:19:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:19:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2025-03-17 06:19:41,228 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-17 06:19:41,229 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2025-03-17 06:19:41,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2025-03-17 06:19:41,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 06:19:41,235 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2025-03-17 06:19:41,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2025-03-17 06:19:41,241 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2025-03-17 06:19:41,241 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2025-03-17 06:19:41,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 06:19:41,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:41,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:41,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:19:41,242 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:41,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:41,242 INFO L85 PathProgramCache]: Analyzing trace with hash 964778290, now seen corresponding path program 1 times [2025-03-17 06:19:41,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:41,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128252135] [2025-03-17 06:19:41,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:41,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:41,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 06:19:41,264 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 06:19:41,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:41,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:41,388 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 06:19:41,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:41,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128252135] [2025-03-17 06:19:41,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128252135] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:41,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:41,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:19:41,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240073541] [2025-03-17 06:19:41,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:41,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:19:41,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:41,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:19:41,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:19:41,393 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:41,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 71 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:19:41,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:41,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:41,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:41,585 INFO L124 PetriNetUnfolderBase]: 382/687 cut-off events. [2025-03-17 06:19:41,585 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2025-03-17 06:19:41,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1584 conditions, 687 events. 382/687 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2905 event pairs, 65 based on Foata normal form. 27/710 useless extension candidates. Maximal degree in co-relation 1570. Up to 246 conditions per place. [2025-03-17 06:19:41,590 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2025-03-17 06:19:41,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2025-03-17 06:19:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:19:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:19:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2025-03-17 06:19:41,591 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-17 06:19:41,591 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2025-03-17 06:19:41,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2025-03-17 06:19:41,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-03-17 06:19:41,596 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2025-03-17 06:19:41,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2025-03-17 06:19:41,596 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2025-03-17 06:19:41,596 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2025-03-17 06:19:41,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:19:41,596 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:41,596 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:41,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:19:41,597 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:41,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1319887630, now seen corresponding path program 2 times [2025-03-17 06:19:41,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:41,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119198296] [2025-03-17 06:19:41,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:41,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:41,605 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 1 equivalence classes. [2025-03-17 06:19:41,611 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 06:19:41,611 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:19:41,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:41,696 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 06:19:41,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:41,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119198296] [2025-03-17 06:19:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119198296] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:41,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:19:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913294222] [2025-03-17 06:19:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:41,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:19:41,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:41,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:19:41,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:19:41,702 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:41,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:19:41,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:41,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:41,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:41,875 INFO L124 PetriNetUnfolderBase]: 328/603 cut-off events. [2025-03-17 06:19:41,875 INFO L125 PetriNetUnfolderBase]: For 971/971 co-relation queries the response was YES. [2025-03-17 06:19:41,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732 conditions, 603 events. 328/603 cut-off events. For 971/971 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2509 event pairs, 65 based on Foata normal form. 45/644 useless extension candidates. Maximal degree in co-relation 1711. Up to 234 conditions per place. [2025-03-17 06:19:41,879 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 38 selfloop transitions, 9 changer transitions 28/78 dead transitions. [2025-03-17 06:19:41,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 496 flow [2025-03-17 06:19:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:19:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:19:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2025-03-17 06:19:41,881 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2025-03-17 06:19:41,881 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 8 states and 103 transitions. [2025-03-17 06:19:41,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 496 flow [2025-03-17 06:19:41,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 488 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-03-17 06:19:41,886 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 210 flow [2025-03-17 06:19:41,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2025-03-17 06:19:41,888 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2025-03-17 06:19:41,888 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 210 flow [2025-03-17 06:19:41,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 06:19:41,888 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:41,888 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:41,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:19:41,888 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:41,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:41,889 INFO L85 PathProgramCache]: Analyzing trace with hash -443489336, now seen corresponding path program 1 times [2025-03-17 06:19:41,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:41,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931809569] [2025-03-17 06:19:41,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:41,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:41,897 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 06:19:41,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 06:19:41,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:41,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:41,987 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 06:19:41,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:41,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931809569] [2025-03-17 06:19:41,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931809569] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:41,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:41,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:19:41,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494457657] [2025-03-17 06:19:41,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:41,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:19:41,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:41,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:19:41,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:19:41,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:41,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 06:19:41,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:41,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:41,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:42,205 INFO L124 PetriNetUnfolderBase]: 337/612 cut-off events. [2025-03-17 06:19:42,205 INFO L125 PetriNetUnfolderBase]: For 1649/1649 co-relation queries the response was YES. [2025-03-17 06:19:42,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 612 events. 337/612 cut-off events. For 1649/1649 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2541 event pairs, 74 based on Foata normal form. 18/626 useless extension candidates. Maximal degree in co-relation 1911. Up to 237 conditions per place. [2025-03-17 06:19:42,209 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 16 changer transitions 24/89 dead transitions. [2025-03-17 06:19:42,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 607 flow [2025-03-17 06:19:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:19:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:19:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2025-03-17 06:19:42,210 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2025-03-17 06:19:42,210 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 210 flow. Second operand 11 states and 135 transitions. [2025-03-17 06:19:42,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 607 flow [2025-03-17 06:19:42,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 540 flow, removed 24 selfloop flow, removed 7 redundant places. [2025-03-17 06:19:42,216 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 279 flow [2025-03-17 06:19:42,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=279, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2025-03-17 06:19:42,217 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2025-03-17 06:19:42,217 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 279 flow [2025-03-17 06:19:42,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 06:19:42,218 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:42,218 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:42,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:19:42,218 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:42,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:42,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1513461300, now seen corresponding path program 2 times [2025-03-17 06:19:42,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:42,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404981175] [2025-03-17 06:19:42,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:42,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:42,223 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 1 equivalence classes. [2025-03-17 06:19:42,225 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 06:19:42,226 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:19:42,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:42,302 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 06:19:42,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:42,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404981175] [2025-03-17 06:19:42,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404981175] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:42,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:42,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:19:42,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315133415] [2025-03-17 06:19:42,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:42,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:19:42,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:42,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:19:42,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:19:42,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:42,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 06:19:42,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:42,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:42,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:42,522 INFO L124 PetriNetUnfolderBase]: 409/742 cut-off events. [2025-03-17 06:19:42,522 INFO L125 PetriNetUnfolderBase]: For 2292/2292 co-relation queries the response was YES. [2025-03-17 06:19:42,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2439 conditions, 742 events. 409/742 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3153 event pairs, 71 based on Foata normal form. 27/764 useless extension candidates. Maximal degree in co-relation 2412. Up to 220 conditions per place. [2025-03-17 06:19:42,527 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 43 selfloop transitions, 18 changer transitions 28/92 dead transitions. [2025-03-17 06:19:42,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 685 flow [2025-03-17 06:19:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:19:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:19:42,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2025-03-17 06:19:42,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2025-03-17 06:19:42,528 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 279 flow. Second operand 10 states and 125 transitions. [2025-03-17 06:19:42,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 685 flow [2025-03-17 06:19:42,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 633 flow, removed 20 selfloop flow, removed 4 redundant places. [2025-03-17 06:19:42,533 INFO L231 Difference]: Finished difference. Result has 63 places, 43 transitions, 347 flow [2025-03-17 06:19:42,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=63, PETRI_TRANSITIONS=43} [2025-03-17 06:19:42,534 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2025-03-17 06:19:42,534 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 43 transitions, 347 flow [2025-03-17 06:19:42,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 06:19:42,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:42,534 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:42,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:19:42,535 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:42,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:42,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1437571864, now seen corresponding path program 1 times [2025-03-17 06:19:42,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:42,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253325473] [2025-03-17 06:19:42,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:42,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:42,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:42,543 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:42,543 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:42,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:42,628 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 06:19:42,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253325473] [2025-03-17 06:19:42,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253325473] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:42,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:42,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:19:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273283392] [2025-03-17 06:19:42,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:42,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:19:42,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:42,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:19:42,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:19:42,633 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:42,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 43 transitions, 347 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:42,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:42,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:42,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:42,826 INFO L124 PetriNetUnfolderBase]: 436/793 cut-off events. [2025-03-17 06:19:42,826 INFO L125 PetriNetUnfolderBase]: For 3583/3583 co-relation queries the response was YES. [2025-03-17 06:19:42,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 793 events. 436/793 cut-off events. For 3583/3583 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3439 event pairs, 59 based on Foata normal form. 18/806 useless extension candidates. Maximal degree in co-relation 2878. Up to 154 conditions per place. [2025-03-17 06:19:42,830 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 44 selfloop transitions, 24 changer transitions 23/94 dead transitions. [2025-03-17 06:19:42,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 795 flow [2025-03-17 06:19:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:19:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:19:42,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2025-03-17 06:19:42,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2025-03-17 06:19:42,831 INFO L175 Difference]: Start difference. First operand has 63 places, 43 transitions, 347 flow. Second operand 10 states and 125 transitions. [2025-03-17 06:19:42,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 795 flow [2025-03-17 06:19:42,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 751 flow, removed 14 selfloop flow, removed 5 redundant places. [2025-03-17 06:19:42,867 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 435 flow [2025-03-17 06:19:42,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=435, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2025-03-17 06:19:42,867 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2025-03-17 06:19:42,867 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 435 flow [2025-03-17 06:19:42,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:42,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:42,868 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:42,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:19:42,868 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:42,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash -245987901, now seen corresponding path program 1 times [2025-03-17 06:19:42,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:42,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893235669] [2025-03-17 06:19:42,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:42,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:42,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:42,875 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:42,875 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:42,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:42,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893235669] [2025-03-17 06:19:42,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893235669] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642013850] [2025-03-17 06:19:42,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:42,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:42,954 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 06:19:42,956 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 06:19:42,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:42,999 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:42,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:42,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:43,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 06:19:43,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:43,071 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:43,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642013850] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:43,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:43,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-03-17 06:19:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032563641] [2025-03-17 06:19:43,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:43,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 06:19:43,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:43,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 06:19:43,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:19:43,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:43,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 435 flow. Second operand has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 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 06:19:43,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:43,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:43,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:43,606 INFO L124 PetriNetUnfolderBase]: 580/1068 cut-off events. [2025-03-17 06:19:43,606 INFO L125 PetriNetUnfolderBase]: For 8203/8203 co-relation queries the response was YES. [2025-03-17 06:19:43,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4410 conditions, 1068 events. 580/1068 cut-off events. For 8203/8203 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4469 event pairs, 149 based on Foata normal form. 63/1127 useless extension candidates. Maximal degree in co-relation 4377. Up to 504 conditions per place. [2025-03-17 06:19:43,613 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 65 selfloop transitions, 17 changer transitions 67/152 dead transitions. [2025-03-17 06:19:43,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 152 transitions, 1435 flow [2025-03-17 06:19:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 06:19:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 06:19:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2025-03-17 06:19:43,615 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2025-03-17 06:19:43,615 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 435 flow. Second operand 19 states and 231 transitions. [2025-03-17 06:19:43,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 152 transitions, 1435 flow [2025-03-17 06:19:43,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 152 transitions, 1343 flow, removed 30 selfloop flow, removed 7 redundant places. [2025-03-17 06:19:43,628 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 559 flow [2025-03-17 06:19:43,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=559, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2025-03-17 06:19:43,630 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 64 predicate places. [2025-03-17 06:19:43,631 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 559 flow [2025-03-17 06:19:43,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 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 06:19:43,631 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:43,631 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:43,638 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 06:19:43,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:43,833 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:43,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:43,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1752855453, now seen corresponding path program 2 times [2025-03-17 06:19:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:43,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340160565] [2025-03-17 06:19:43,837 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:43,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:43,842 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:43,849 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:43,849 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:19:43,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:43,933 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 06:19:43,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:43,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340160565] [2025-03-17 06:19:43,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340160565] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:43,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:43,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:19:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615632898] [2025-03-17 06:19:43,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:43,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:19:43,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:43,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:19:43,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:19:43,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:43,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 52 transitions, 559 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:43,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:43,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:43,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:44,252 INFO L124 PetriNetUnfolderBase]: 661/1235 cut-off events. [2025-03-17 06:19:44,252 INFO L125 PetriNetUnfolderBase]: For 21079/21079 co-relation queries the response was YES. [2025-03-17 06:19:44,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6357 conditions, 1235 events. 661/1235 cut-off events. For 21079/21079 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5748 event pairs, 144 based on Foata normal form. 27/1258 useless extension candidates. Maximal degree in co-relation 6313. Up to 501 conditions per place. [2025-03-17 06:19:44,261 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 77 selfloop transitions, 23 changer transitions 31/134 dead transitions. [2025-03-17 06:19:44,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1579 flow [2025-03-17 06:19:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:19:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:19:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 187 transitions. [2025-03-17 06:19:44,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5194444444444445 [2025-03-17 06:19:44,262 INFO L175 Difference]: Start difference. First operand has 90 places, 52 transitions, 559 flow. Second operand 15 states and 187 transitions. [2025-03-17 06:19:44,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1579 flow [2025-03-17 06:19:44,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 134 transitions, 1247 flow, removed 155 selfloop flow, removed 12 redundant places. [2025-03-17 06:19:44,279 INFO L231 Difference]: Finished difference. Result has 92 places, 58 transitions, 617 flow [2025-03-17 06:19:44,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=617, PETRI_PLACES=92, PETRI_TRANSITIONS=58} [2025-03-17 06:19:44,279 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 66 predicate places. [2025-03-17 06:19:44,279 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 58 transitions, 617 flow [2025-03-17 06:19:44,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:44,280 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:44,280 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:44,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:19:44,280 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:44,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:44,280 INFO L85 PathProgramCache]: Analyzing trace with hash 419544819, now seen corresponding path program 3 times [2025-03-17 06:19:44,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:44,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320223395] [2025-03-17 06:19:44,280 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:44,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:44,284 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:19:44,287 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:19:44,287 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:19:44,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:44,363 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 06:19:44,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:44,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320223395] [2025-03-17 06:19:44,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320223395] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:44,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:44,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:19:44,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243290960] [2025-03-17 06:19:44,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:44,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:19:44,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:44,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:19:44,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:19:44,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:44,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 58 transitions, 617 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:44,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:44,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:44,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:44,659 INFO L124 PetriNetUnfolderBase]: 598/1127 cut-off events. [2025-03-17 06:19:44,659 INFO L125 PetriNetUnfolderBase]: For 15552/15552 co-relation queries the response was YES. [2025-03-17 06:19:44,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5381 conditions, 1127 events. 598/1127 cut-off events. For 15552/15552 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5166 event pairs, 150 based on Foata normal form. 45/1168 useless extension candidates. Maximal degree in co-relation 5337. Up to 471 conditions per place. [2025-03-17 06:19:44,667 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 65 selfloop transitions, 24 changer transitions 39/131 dead transitions. [2025-03-17 06:19:44,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 131 transitions, 1473 flow [2025-03-17 06:19:44,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 06:19:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 06:19:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 173 transitions. [2025-03-17 06:19:44,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2025-03-17 06:19:44,668 INFO L175 Difference]: Start difference. First operand has 92 places, 58 transitions, 617 flow. Second operand 14 states and 173 transitions. [2025-03-17 06:19:44,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 131 transitions, 1473 flow [2025-03-17 06:19:44,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 1293 flow, removed 74 selfloop flow, removed 10 redundant places. [2025-03-17 06:19:44,689 INFO L231 Difference]: Finished difference. Result has 97 places, 59 transitions, 614 flow [2025-03-17 06:19:44,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=614, PETRI_PLACES=97, PETRI_TRANSITIONS=59} [2025-03-17 06:19:44,690 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2025-03-17 06:19:44,690 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 59 transitions, 614 flow [2025-03-17 06:19:44,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 06:19:44,690 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:44,690 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:44,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:19:44,691 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:44,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:44,691 INFO L85 PathProgramCache]: Analyzing trace with hash 286114721, now seen corresponding path program 1 times [2025-03-17 06:19:44,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:44,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963783109] [2025-03-17 06:19:44,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:44,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:19:44,699 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:19:44,699 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:44,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:44,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:44,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963783109] [2025-03-17 06:19:44,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963783109] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:44,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855122179] [2025-03-17 06:19:44,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:44,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:44,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:44,820 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 06:19:44,821 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 06:19:44,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:19:44,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:19:44,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:44,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:44,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:19:44,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:44,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855122179] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:45,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:45,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-03-17 06:19:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333542160] [2025-03-17 06:19:45,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:45,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 06:19:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:45,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 06:19:45,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:19:45,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:45,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 59 transitions, 614 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 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 06:19:45,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:45,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:45,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:45,636 INFO L124 PetriNetUnfolderBase]: 841/1575 cut-off events. [2025-03-17 06:19:45,636 INFO L125 PetriNetUnfolderBase]: For 27476/27476 co-relation queries the response was YES. [2025-03-17 06:19:45,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 1575 events. 841/1575 cut-off events. For 27476/27476 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7782 event pairs, 36 based on Foata normal form. 72/1643 useless extension candidates. Maximal degree in co-relation 8138. Up to 255 conditions per place. [2025-03-17 06:19:45,646 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 79 selfloop transitions, 55 changer transitions 88/225 dead transitions. [2025-03-17 06:19:45,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 225 transitions, 2634 flow [2025-03-17 06:19:45,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 06:19:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-17 06:19:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 341 transitions. [2025-03-17 06:19:45,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5074404761904762 [2025-03-17 06:19:45,648 INFO L175 Difference]: Start difference. First operand has 97 places, 59 transitions, 614 flow. Second operand 28 states and 341 transitions. [2025-03-17 06:19:45,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 225 transitions, 2634 flow [2025-03-17 06:19:45,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 225 transitions, 2456 flow, removed 67 selfloop flow, removed 12 redundant places. [2025-03-17 06:19:45,677 INFO L231 Difference]: Finished difference. Result has 127 places, 76 transitions, 1102 flow [2025-03-17 06:19:45,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1102, PETRI_PLACES=127, PETRI_TRANSITIONS=76} [2025-03-17 06:19:45,678 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 101 predicate places. [2025-03-17 06:19:45,678 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 76 transitions, 1102 flow [2025-03-17 06:19:45,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 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 06:19:45,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:45,679 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:45,685 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 06:19:45,879 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,SelfDestructingSolverStorable9 [2025-03-17 06:19:45,880 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:45,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:45,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1629126176, now seen corresponding path program 2 times [2025-03-17 06:19:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:45,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364091011] [2025-03-17 06:19:45,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:45,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:45,887 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:19:45,892 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:19:45,892 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:19:45,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:46,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:46,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364091011] [2025-03-17 06:19:46,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364091011] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:46,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987537996] [2025-03-17 06:19:46,012 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:46,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:46,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:46,014 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 06:19:46,019 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 06:19:46,048 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:19:46,058 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:19:46,058 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:19:46,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:46,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:19:46,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:46,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:46,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987537996] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:46,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:46,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-17 06:19:46,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173677547] [2025-03-17 06:19:46,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:46,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 06:19:46,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:46,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 06:19:46,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:19:46,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:46,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 76 transitions, 1102 flow. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 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 06:19:46,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:46,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:46,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:47,118 INFO L124 PetriNetUnfolderBase]: 1417/2670 cut-off events. [2025-03-17 06:19:47,118 INFO L125 PetriNetUnfolderBase]: For 116610/116610 co-relation queries the response was YES. [2025-03-17 06:19:47,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19112 conditions, 2670 events. 1417/2670 cut-off events. For 116610/116610 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 14801 event pairs, 54 based on Foata normal form. 90/2756 useless extension candidates. Maximal degree in co-relation 19051. Up to 534 conditions per place. [2025-03-17 06:19:47,143 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 120 selfloop transitions, 91 changer transitions 110/324 dead transitions. [2025-03-17 06:19:47,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 324 transitions, 5645 flow [2025-03-17 06:19:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-17 06:19:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-03-17 06:19:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 456 transitions. [2025-03-17 06:19:47,146 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2025-03-17 06:19:47,146 INFO L175 Difference]: Start difference. First operand has 127 places, 76 transitions, 1102 flow. Second operand 37 states and 456 transitions. [2025-03-17 06:19:47,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 324 transitions, 5645 flow [2025-03-17 06:19:47,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 324 transitions, 4418 flow, removed 583 selfloop flow, removed 17 redundant places. [2025-03-17 06:19:47,229 INFO L231 Difference]: Finished difference. Result has 163 places, 116 transitions, 1998 flow [2025-03-17 06:19:47,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1998, PETRI_PLACES=163, PETRI_TRANSITIONS=116} [2025-03-17 06:19:47,229 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 137 predicate places. [2025-03-17 06:19:47,230 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 116 transitions, 1998 flow [2025-03-17 06:19:47,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 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 06:19:47,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:47,230 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:47,236 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 06:19:47,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:47,434 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:47,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash 728336222, now seen corresponding path program 3 times [2025-03-17 06:19:47,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:47,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873259101] [2025-03-17 06:19:47,435 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:47,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:47,442 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-17 06:19:47,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:19:47,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 06:19:47,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:47,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:47,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873259101] [2025-03-17 06:19:47,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873259101] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:47,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502303365] [2025-03-17 06:19:47,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:47,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:47,578 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 06:19:47,579 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 06:19:47,606 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-17 06:19:47,616 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:19:47,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 06:19:47,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:47,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:19:47,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:47,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:47,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502303365] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:47,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:47,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2025-03-17 06:19:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632580716] [2025-03-17 06:19:47,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:47,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 06:19:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:47,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 06:19:47,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2025-03-17 06:19:47,790 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:47,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 116 transitions, 1998 flow. Second operand has 20 states, 20 states have (on average 7.05) internal successors, (141), 20 states have internal predecessors, (141), 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 06:19:47,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:47,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:47,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:48,970 INFO L124 PetriNetUnfolderBase]: 1822/3487 cut-off events. [2025-03-17 06:19:48,970 INFO L125 PetriNetUnfolderBase]: For 282215/282215 co-relation queries the response was YES. [2025-03-17 06:19:48,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29136 conditions, 3487 events. 1822/3487 cut-off events. For 282215/282215 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 18988 event pairs, 44 based on Foata normal form. 135/3618 useless extension candidates. Maximal degree in co-relation 29059. Up to 726 conditions per place. [2025-03-17 06:19:48,994 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 132 selfloop transitions, 126 changer transitions 134/395 dead transitions. [2025-03-17 06:19:48,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 395 transitions, 8383 flow [2025-03-17 06:19:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-17 06:19:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-03-17 06:19:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 515 transitions. [2025-03-17 06:19:48,997 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5109126984126984 [2025-03-17 06:19:48,997 INFO L175 Difference]: Start difference. First operand has 163 places, 116 transitions, 1998 flow. Second operand 42 states and 515 transitions. [2025-03-17 06:19:48,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 395 transitions, 8383 flow [2025-03-17 06:19:49,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 395 transitions, 6255 flow, removed 1040 selfloop flow, removed 22 redundant places. [2025-03-17 06:19:49,213 INFO L231 Difference]: Finished difference. Result has 197 places, 151 transitions, 2785 flow [2025-03-17 06:19:49,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2785, PETRI_PLACES=197, PETRI_TRANSITIONS=151} [2025-03-17 06:19:49,214 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 171 predicate places. [2025-03-17 06:19:49,214 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 151 transitions, 2785 flow [2025-03-17 06:19:49,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.05) internal successors, (141), 20 states have internal predecessors, (141), 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 06:19:49,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:49,214 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:49,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 06:19:49,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:49,415 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:49,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2068569921, now seen corresponding path program 4 times [2025-03-17 06:19:49,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:49,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660331239] [2025-03-17 06:19:49,416 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:19:49,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:49,428 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-03-17 06:19:49,433 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 06:19:49,433 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:19:49,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:49,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:49,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660331239] [2025-03-17 06:19:49,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660331239] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:49,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119758381] [2025-03-17 06:19:49,687 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:19:49,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:49,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:49,688 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 06:19:49,690 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 06:19:49,718 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-03-17 06:19:49,729 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 06:19:49,730 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:19:49,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:49,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 06:19:49,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:49,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:50,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119758381] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:50,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:50,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2025-03-17 06:19:50,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967243224] [2025-03-17 06:19:50,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:50,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-17 06:19:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:50,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-17 06:19:50,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 06:19:50,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:50,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 151 transitions, 2785 flow. Second operand has 34 states, 34 states have (on average 7.029411764705882) internal successors, (239), 34 states have internal predecessors, (239), 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 06:19:50,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:50,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:50,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:52,373 INFO L124 PetriNetUnfolderBase]: 2731/5092 cut-off events. [2025-03-17 06:19:52,373 INFO L125 PetriNetUnfolderBase]: For 506139/506139 co-relation queries the response was YES. [2025-03-17 06:19:52,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46592 conditions, 5092 events. 2731/5092 cut-off events. For 506139/506139 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 25550 event pairs, 65 based on Foata normal form. 135/5222 useless extension candidates. Maximal degree in co-relation 46503. Up to 1107 conditions per place. [2025-03-17 06:19:52,419 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 214 selfloop transitions, 181 changer transitions 206/604 dead transitions. [2025-03-17 06:19:52,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 604 transitions, 13947 flow [2025-03-17 06:19:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2025-03-17 06:19:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2025-03-17 06:19:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 846 transitions. [2025-03-17 06:19:52,427 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2025-03-17 06:19:52,427 INFO L175 Difference]: Start difference. First operand has 197 places, 151 transitions, 2785 flow. Second operand 69 states and 846 transitions. [2025-03-17 06:19:52,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 604 transitions, 13947 flow [2025-03-17 06:19:52,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 604 transitions, 11900 flow, removed 1008 selfloop flow, removed 16 redundant places. [2025-03-17 06:19:52,986 INFO L231 Difference]: Finished difference. Result has 282 places, 210 transitions, 4849 flow [2025-03-17 06:19:52,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=4849, PETRI_PLACES=282, PETRI_TRANSITIONS=210} [2025-03-17 06:19:52,987 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 256 predicate places. [2025-03-17 06:19:52,987 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 210 transitions, 4849 flow [2025-03-17 06:19:52,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.029411764705882) internal successors, (239), 34 states have internal predecessors, (239), 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 06:19:52,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:52,987 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:52,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 06:19:53,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 06:19:53,188 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:19:53,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1984624167, now seen corresponding path program 5 times [2025-03-17 06:19:53,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:53,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242034318] [2025-03-17 06:19:53,188 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:19:53,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:53,195 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 87 statements into 12 equivalence classes. [2025-03-17 06:19:53,212 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 87 of 87 statements. [2025-03-17 06:19:53,212 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-17 06:19:53,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:19:53,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242034318] [2025-03-17 06:19:53,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242034318] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325586014] [2025-03-17 06:19:53,975 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:19:53,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:53,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:53,977 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 06:19:53,980 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 06:19:54,011 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 87 statements into 12 equivalence classes. [2025-03-17 06:19:54,034 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 87 of 87 statements. [2025-03-17 06:19:54,034 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-17 06:19:54,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:54,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 06:19:54,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:19:54,254 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:19:54,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325586014] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:54,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:54,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2025-03-17 06:19:54,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014783202] [2025-03-17 06:19:54,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:54,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-17 06:19:54,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:54,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-17 06:19:54,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2025-03-17 06:19:54,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:19:54,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 210 transitions, 4849 flow. Second operand has 49 states, 49 states have (on average 7.183673469387755) internal successors, (352), 49 states have internal predecessors, (352), 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 06:19:54,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:54,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:19:54,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:57,651 INFO L124 PetriNetUnfolderBase]: 3289/6345 cut-off events. [2025-03-17 06:19:57,651 INFO L125 PetriNetUnfolderBase]: For 1351086/1351086 co-relation queries the response was YES. [2025-03-17 06:19:57,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76224 conditions, 6345 events. 3289/6345 cut-off events. For 1351086/1351086 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 32554 event pairs, 1121 based on Foata normal form. 189/6530 useless extension candidates. Maximal degree in co-relation 76101. Up to 3888 conditions per place. [2025-03-17 06:19:57,797 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 332 selfloop transitions, 67 changer transitions 237/639 dead transitions. [2025-03-17 06:19:57,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 639 transitions, 21037 flow [2025-03-17 06:19:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2025-03-17 06:19:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2025-03-17 06:19:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 809 transitions. [2025-03-17 06:19:57,800 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4885265700483092 [2025-03-17 06:19:57,800 INFO L175 Difference]: Start difference. First operand has 282 places, 210 transitions, 4849 flow. Second operand 69 states and 809 transitions. [2025-03-17 06:19:57,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 639 transitions, 21037 flow [2025-03-17 06:19:59,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 639 transitions, 16883 flow, removed 2043 selfloop flow, removed 24 redundant places. [2025-03-17 06:19:59,838 INFO L231 Difference]: Finished difference. Result has 360 places, 260 transitions, 5951 flow [2025-03-17 06:19:59,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=5951, PETRI_PLACES=360, PETRI_TRANSITIONS=260} [2025-03-17 06:19:59,839 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 334 predicate places. [2025-03-17 06:19:59,840 INFO L471 AbstractCegarLoop]: Abstraction has has 360 places, 260 transitions, 5951 flow [2025-03-17 06:19:59,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 7.183673469387755) internal successors, (352), 49 states have internal predecessors, (352), 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 06:19:59,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:59,840 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:59,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 06:20:00,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:20:00,041 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:20:00,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:20:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1241897333, now seen corresponding path program 6 times [2025-03-17 06:20:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:20:00,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396678729] [2025-03-17 06:20:00,043 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:20:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:20:00,049 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 87 statements into 11 equivalence classes. [2025-03-17 06:20:00,059 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 87 of 87 statements. [2025-03-17 06:20:00,059 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-17 06:20:00,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 314 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:20:00,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:20:00,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396678729] [2025-03-17 06:20:00,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396678729] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:20:00,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15830926] [2025-03-17 06:20:00,540 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:20:00,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:20:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:20:00,543 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 06:20:00,544 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 06:20:00,577 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 87 statements into 11 equivalence classes. [2025-03-17 06:20:00,603 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 87 of 87 statements. [2025-03-17 06:20:00,603 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-17 06:20:00,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:00,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 06:20:00,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:20:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 314 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:20:00,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:20:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 314 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:20:01,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15830926] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:20:01,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:20:01,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2025-03-17 06:20:01,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500642978] [2025-03-17 06:20:01,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:20:01,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-17 06:20:01,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:20:01,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-17 06:20:01,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=1995, Unknown=0, NotChecked=0, Total=2550 [2025-03-17 06:20:01,371 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:20:01,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 260 transitions, 5951 flow. Second operand has 51 states, 51 states have (on average 7.176470588235294) internal successors, (366), 51 states have internal predecessors, (366), 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 06:20:01,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:20:01,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:20:01,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:20:04,939 INFO L124 PetriNetUnfolderBase]: 4261/8561 cut-off events. [2025-03-17 06:20:04,939 INFO L125 PetriNetUnfolderBase]: For 2650776/2650776 co-relation queries the response was YES. [2025-03-17 06:20:05,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115224 conditions, 8561 events. 4261/8561 cut-off events. For 2650776/2650776 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 48985 event pairs, 798 based on Foata normal form. 189/8746 useless extension candidates. Maximal degree in co-relation 115067. Up to 2893 conditions per place. [2025-03-17 06:20:05,066 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 308 selfloop transitions, 225 changer transitions 251/787 dead transitions. [2025-03-17 06:20:05,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 787 transitions, 26744 flow [2025-03-17 06:20:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-17 06:20:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2025-03-17 06:20:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 895 transitions. [2025-03-17 06:20:05,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4906798245614035 [2025-03-17 06:20:05,073 INFO L175 Difference]: Start difference. First operand has 360 places, 260 transitions, 5951 flow. Second operand 76 states and 895 transitions. [2025-03-17 06:20:05,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 787 transitions, 26744 flow [2025-03-17 06:20:13,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 787 transitions, 22894 flow, removed 1911 selfloop flow, removed 31 redundant places. [2025-03-17 06:20:13,161 INFO L231 Difference]: Finished difference. Result has 424 places, 367 transitions, 8963 flow [2025-03-17 06:20:13,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=8963, PETRI_PLACES=424, PETRI_TRANSITIONS=367} [2025-03-17 06:20:13,162 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 398 predicate places. [2025-03-17 06:20:13,162 INFO L471 AbstractCegarLoop]: Abstraction has has 424 places, 367 transitions, 8963 flow [2025-03-17 06:20:13,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.176470588235294) internal successors, (366), 51 states have internal predecessors, (366), 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 06:20:13,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:20:13,162 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:20:13,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 06:20:13,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:20:13,363 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:20:13,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:20:13,365 INFO L85 PathProgramCache]: Analyzing trace with hash 66659557, now seen corresponding path program 7 times [2025-03-17 06:20:13,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:20:13,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578286998] [2025-03-17 06:20:13,365 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:20:13,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:20:13,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-03-17 06:20:13,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-03-17 06:20:13,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:13,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:20:13,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:20:13,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578286998] [2025-03-17 06:20:13,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578286998] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:20:13,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412035911] [2025-03-17 06:20:13,853 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:20:13,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:20:13,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:20:13,855 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 06:20:13,856 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 06:20:13,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-03-17 06:20:13,907 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-03-17 06:20:13,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:13,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:13,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 06:20:13,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:20:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:20:14,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:20:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:20:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412035911] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:20:14,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:20:14,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2025-03-17 06:20:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425539338] [2025-03-17 06:20:14,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:20:14,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-17 06:20:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:20:14,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-17 06:20:14,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2025-03-17 06:20:14,689 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:20:14,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 367 transitions, 8963 flow. Second operand has 55 states, 55 states have (on average 7.181818181818182) internal successors, (395), 55 states have internal predecessors, (395), 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 06:20:14,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:20:14,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:20:14,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:20:19,723 INFO L124 PetriNetUnfolderBase]: 5566/11584 cut-off events. [2025-03-17 06:20:19,724 INFO L125 PetriNetUnfolderBase]: For 4865876/4865876 co-relation queries the response was YES. [2025-03-17 06:20:19,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173694 conditions, 11584 events. 5566/11584 cut-off events. For 4865876/4865876 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 74502 event pairs, 440 based on Foata normal form. 189/11769 useless extension candidates. Maximal degree in co-relation 173516. Up to 2997 conditions per place. [2025-03-17 06:20:19,896 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 279 selfloop transitions, 430 changer transitions 265/977 dead transitions. [2025-03-17 06:20:19,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 977 transitions, 36076 flow [2025-03-17 06:20:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2025-03-17 06:20:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2025-03-17 06:20:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 986 transitions. [2025-03-17 06:20:19,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49497991967871485 [2025-03-17 06:20:19,899 INFO L175 Difference]: Start difference. First operand has 424 places, 367 transitions, 8963 flow. Second operand 83 states and 986 transitions. [2025-03-17 06:20:19,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 977 transitions, 36076 flow [2025-03-17 06:20:39,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 977 transitions, 31047 flow, removed 2481 selfloop flow, removed 35 redundant places. [2025-03-17 06:20:39,860 INFO L231 Difference]: Finished difference. Result has 495 places, 515 transitions, 13701 flow [2025-03-17 06:20:39,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6992, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=13701, PETRI_PLACES=495, PETRI_TRANSITIONS=515} [2025-03-17 06:20:39,861 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 469 predicate places. [2025-03-17 06:20:39,862 INFO L471 AbstractCegarLoop]: Abstraction has has 495 places, 515 transitions, 13701 flow [2025-03-17 06:20:39,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 7.181818181818182) internal successors, (395), 55 states have internal predecessors, (395), 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 06:20:39,862 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:20:39,862 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 14, 13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:20:39,868 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 06:20:40,062 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,SelfDestructingSolverStorable15 [2025-03-17 06:20:40,063 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:20:40,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:20:40,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2002825689, now seen corresponding path program 8 times [2025-03-17 06:20:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:20:40,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389405343] [2025-03-17 06:20:40,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:20:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:20:40,072 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 87 statements into 2 equivalence classes. [2025-03-17 06:20:40,085 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 87 of 87 statements. [2025-03-17 06:20:40,085 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:20:40,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:20:40,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:20:40,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389405343] [2025-03-17 06:20:40,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389405343] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:20:40,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641851356] [2025-03-17 06:20:40,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:20:40,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:20:40,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:20:40,459 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 06:20:40,461 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 06:20:40,490 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 87 statements into 2 equivalence classes. [2025-03-17 06:20:40,505 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 87 of 87 statements. [2025-03-17 06:20:40,505 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:20:40,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:40,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 06:20:40,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:20:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:20:40,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:20:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:20:41,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641851356] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:20:41,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:20:41,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2025-03-17 06:20:41,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755693484] [2025-03-17 06:20:41,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:20:41,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-17 06:20:41,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:20:41,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-17 06:20:41,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=2661, Unknown=0, NotChecked=0, Total=3192 [2025-03-17 06:20:41,134 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:20:41,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 515 transitions, 13701 flow. Second operand has 57 states, 57 states have (on average 7.105263157894737) internal successors, (405), 57 states have internal predecessors, (405), 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 06:20:41,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:20:41,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:20:41,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:20:49,111 INFO L124 PetriNetUnfolderBase]: 8275/16834 cut-off events. [2025-03-17 06:20:49,112 INFO L125 PetriNetUnfolderBase]: For 9425557/9425557 co-relation queries the response was YES. [2025-03-17 06:20:49,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281570 conditions, 16834 events. 8275/16834 cut-off events. For 9425557/9425557 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 114419 event pairs, 204 based on Foata normal form. 189/17019 useless extension candidates. Maximal degree in co-relation 281368. Up to 4308 conditions per place. [2025-03-17 06:20:49,360 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 338 selfloop transitions, 663 changer transitions 259/1263 dead transitions. [2025-03-17 06:20:49,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1263 transitions, 49836 flow [2025-03-17 06:20:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-03-17 06:20:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2025-03-17 06:20:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1171 transitions. [2025-03-17 06:20:49,366 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5082465277777778 [2025-03-17 06:20:49,366 INFO L175 Difference]: Start difference. First operand has 495 places, 515 transitions, 13701 flow. Second operand 96 states and 1171 transitions. [2025-03-17 06:20:49,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1263 transitions, 49836 flow