./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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/fib_safe-11.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 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 01:59:12,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 01:59:12,561 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 01:59:12,565 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 01:59:12,566 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 01:59:12,585 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 01:59:12,593 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 01:59:12,593 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 01:59:12,593 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 01:59:12,593 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 01:59:12,593 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 01:59:12,593 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 01:59:12,594 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 01:59:12,594 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 01:59:12,594 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 01:59:12,594 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 01:59:12,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 01:59:12,595 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 01:59:12,595 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 -> 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 [2025-03-04 01:59:12,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 01:59:12,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 01:59:12,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 01:59:12,842 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 01:59:12,843 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 01:59:12,844 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-11.i [2025-03-04 01:59:14,010 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a43dbcb/386786e617464b79ae62bb1436be7285/FLAG9675f67ea [2025-03-04 01:59:14,278 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 01:59:14,280 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-11.i [2025-03-04 01:59:14,293 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a43dbcb/386786e617464b79ae62bb1436be7285/FLAG9675f67ea [2025-03-04 01:59:14,310 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a43dbcb/386786e617464b79ae62bb1436be7285 [2025-03-04 01:59:14,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 01:59:14,314 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 01:59:14,315 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 01:59:14,315 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 01:59:14,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 01:59:14,318 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,320 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4444dd87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14, skipping insertion in model container [2025-03-04 01:59:14,320 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,349 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 01:59:14,600 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/fib_safe-11.i[30241,30254] [2025-03-04 01:59:14,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 01:59:14,630 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 01:59:14,662 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/fib_safe-11.i[30241,30254] [2025-03-04 01:59:14,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 01:59:14,694 INFO L204 MainTranslator]: Completed translation [2025-03-04 01:59:14,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14 WrapperNode [2025-03-04 01:59:14,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 01:59:14,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 01:59:14,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 01:59:14,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 01:59:14,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,708 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,723 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-04 01:59:14,724 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 01:59:14,724 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 01:59:14,724 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 01:59:14,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 01:59:14,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,731 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,744 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]. [2025-03-04 01:59:14,745 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,745 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,758 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,760 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,765 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 01:59:14,767 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 01:59:14,771 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 01:59:14,771 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 01:59:14,772 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (1/1) ... [2025-03-04 01:59:14,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 01:59:14,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:14,847 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) [2025-03-04 01:59:14,851 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 [2025-03-04 01:59:14,876 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-04 01:59:14,876 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-04 01:59:14,876 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-04 01:59:14,877 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-04 01:59:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 01:59:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 01:59:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 01:59:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 01:59:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 01:59:14,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 01:59:14,878 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 01:59:14,983 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 01:59:14,985 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 01:59:15,112 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 01:59:15,113 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 01:59:15,187 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 01:59:15,187 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 01:59:15,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 01:59:15 BoogieIcfgContainer [2025-03-04 01:59:15,188 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 01:59:15,192 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 01:59:15,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 01:59:15,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 01:59:15,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 01:59:14" (1/3) ... [2025-03-04 01:59:15,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb191a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 01:59:15, skipping insertion in model container [2025-03-04 01:59:15,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:14" (2/3) ... [2025-03-04 01:59:15,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb191a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 01:59:15, skipping insertion in model container [2025-03-04 01:59:15,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 01:59:15" (3/3) ... [2025-03-04 01:59:15,198 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2025-03-04 01:59:15,210 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 01:59:15,211 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-11.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-04 01:59:15,211 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 01:59:15,249 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-04 01:59:15,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-04 01:59:15,314 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-04 01:59:15,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 01:59:15,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-03-04 01:59:15,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-04 01:59:15,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-04 01:59:15,331 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 01:59:15,345 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;@79c7bfbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 01:59:15,347 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-04 01:59:15,356 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 01:59:15,357 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-04 01:59:15,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 01:59:15,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:15,359 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:15,359 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:15,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash -412560026, now seen corresponding path program 1 times [2025-03-04 01:59:15,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:15,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823273324] [2025-03-04 01:59:15,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 01:59:15,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:15,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-04 01:59:15,463 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 01:59:15,463 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 01:59:15,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:15,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:15,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823273324] [2025-03-04 01:59:15,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823273324] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 01:59:15,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 01:59:15,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 01:59:15,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807291703] [2025-03-04 01:59:15,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 01:59:15,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 01:59:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:15,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 01:59:15,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 01:59:15,620 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:15,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-03-04 01:59:15,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:15,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:15,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:15,771 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-04 01:59:15,771 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-04 01:59:15,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 410 events. 233/410 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1576 event pairs, 39 based on Foata normal form. 16/389 useless extension candidates. Maximal degree in co-relation 765. Up to 257 conditions per place. [2025-03-04 01:59:15,776 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-04 01:59:15,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-04 01:59:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 01:59:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 01:59:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-04 01:59:15,789 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-04 01:59:15,790 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-04 01:59:15,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-04 01:59:15,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 01:59:15,799 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-04 01:59:15,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2025-03-04 01:59:15,804 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-04 01:59:15,806 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-04 01:59:15,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-03-04 01:59:15,806 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:15,807 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:15,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 01:59:15,808 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:15,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash 103279624, now seen corresponding path program 1 times [2025-03-04 01:59:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:15,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728355397] [2025-03-04 01:59:15,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 01:59:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:15,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 01:59:15,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 01:59:15,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 01:59:15,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:15,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:15,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728355397] [2025-03-04 01:59:15,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728355397] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:15,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744271696] [2025-03-04 01:59:15,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 01:59:15,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:15,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:15,939 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) [2025-03-04 01:59:15,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 01:59:15,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 01:59:16,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 01:59:16,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 01:59:16,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:16,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 01:59:16,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:16,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:16,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744271696] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:16,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:16,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-04 01:59:16,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176511116] [2025-03-04 01:59:16,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:16,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-04 01:59:16,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:16,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-04 01:59:16,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-04 01:59:16,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:16,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2025-03-04 01:59:16,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:16,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:16,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:16,220 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-04 01:59:16,220 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 01:59:16,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 506 events. 297/506 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1880 event pairs, 39 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1069. Up to 209 conditions per place. [2025-03-04 01:59:16,225 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-04 01:59:16,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-04 01:59:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 01:59:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 01:59:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-04 01:59:16,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-04 01:59:16,228 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-04 01:59:16,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-04 01:59:16,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 01:59:16,229 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-04 01:59:16,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2025-03-04 01:59:16,230 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-04 01:59:16,230 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-04 01:59:16,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2025-03-04 01:59:16,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:16,230 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:16,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 01:59:16,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:16,435 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:16,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash 701132262, now seen corresponding path program 2 times [2025-03-04 01:59:16,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:16,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090814263] [2025-03-04 01:59:16,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 01:59:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:16,443 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-04 01:59:16,462 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 01:59:16,463 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 01:59:16,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:16,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:16,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090814263] [2025-03-04 01:59:16,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090814263] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:16,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147216106] [2025-03-04 01:59:16,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 01:59:16,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:16,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:16,572 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) [2025-03-04 01:59:16,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 01:59:16,621 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-04 01:59:16,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 01:59:16,641 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 01:59:16,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:16,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 01:59:16,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:16,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:16,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147216106] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:16,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:16,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-04 01:59:16,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810837070] [2025-03-04 01:59:16,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:16,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 01:59:16,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:16,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 01:59:16,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-04 01:59:16,723 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:16,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-03-04 01:59:16,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:16,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:16,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:16,959 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-04 01:59:16,959 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-04 01:59:16,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 794 events. 489/794 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2900 event pairs, 39 based on Foata normal form. 96/869 useless extension candidates. Maximal degree in co-relation 1997. Up to 209 conditions per place. [2025-03-04 01:59:16,966 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-04 01:59:16,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-04 01:59:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 01:59:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 01:59:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-04 01:59:16,970 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-04 01:59:16,971 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-04 01:59:16,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-04 01:59:16,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-04 01:59:16,976 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-04 01:59:16,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2025-03-04 01:59:16,978 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-04 01:59:16,978 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-04 01:59:16,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-03-04 01:59:16,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:16,979 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:16,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 01:59:17,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-04 01:59:17,180 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:17,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1268144806, now seen corresponding path program 3 times [2025-03-04 01:59:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:17,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33005205] [2025-03-04 01:59:17,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 01:59:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:17,187 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-04 01:59:17,224 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-04 01:59:17,224 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 01:59:17,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:17,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:17,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33005205] [2025-03-04 01:59:17,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33005205] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:17,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157452081] [2025-03-04 01:59:17,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 01:59:17,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:17,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:17,414 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) [2025-03-04 01:59:17,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 01:59:17,455 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-04 01:59:17,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-04 01:59:17,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 01:59:17,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:17,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 01:59:17,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:17,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:17,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157452081] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:17,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:17,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-04 01:59:17,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414951338] [2025-03-04 01:59:17,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:17,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-04 01:59:17,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:17,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-04 01:59:17,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-04 01:59:17,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:17,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-03-04 01:59:17,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:17,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:17,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:18,052 INFO L124 PetriNetUnfolderBase]: 873/1370 cut-off events. [2025-03-04 01:59:18,053 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-03-04 01:59:18,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4025 conditions, 1370 events. 873/1370 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4946 event pairs, 39 based on Foata normal form. 192/1541 useless extension candidates. Maximal degree in co-relation 3997. Up to 337 conditions per place. [2025-03-04 01:59:18,062 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 195 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2025-03-04 01:59:18,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 223 transitions, 1054 flow [2025-03-04 01:59:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-04 01:59:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-04 01:59:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 398 transitions. [2025-03-04 01:59:18,068 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5718390804597702 [2025-03-04 01:59:18,068 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 398 transitions. [2025-03-04 01:59:18,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 223 transitions, 1054 flow [2025-03-04 01:59:18,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 223 transitions, 982 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-03-04 01:59:18,081 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2025-03-04 01:59:18,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=47} [2025-03-04 01:59:18,083 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-03-04 01:59:18,084 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2025-03-04 01:59:18,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-03-04 01:59:18,084 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:18,084 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:18,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-04 01:59:18,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:18,285 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:18,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:18,285 INFO L85 PathProgramCache]: Analyzing trace with hash 167543846, now seen corresponding path program 4 times [2025-03-04 01:59:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:18,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345711354] [2025-03-04 01:59:18,286 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 01:59:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:18,296 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-04 01:59:18,312 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 01:59:18,313 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 01:59:18,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:18,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:18,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345711354] [2025-03-04 01:59:18,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345711354] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:18,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374123432] [2025-03-04 01:59:18,751 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 01:59:18,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:18,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:18,753 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) [2025-03-04 01:59:18,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 01:59:18,804 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-04 01:59:18,832 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 01:59:18,832 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 01:59:18,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:18,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-04 01:59:18,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:18,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:19,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374123432] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:19,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:19,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2025-03-04 01:59:19,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035055554] [2025-03-04 01:59:19,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:19,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-04 01:59:19,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:19,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-04 01:59:19,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2025-03-04 01:59:19,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:19,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 26 states, 26 states have (on average 8.384615384615385) internal successors, (218), 26 states have internal predecessors, (218), 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) [2025-03-04 01:59:19,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:19,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:19,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:19,525 INFO L124 PetriNetUnfolderBase]: 937/1466 cut-off events. [2025-03-04 01:59:19,525 INFO L125 PetriNetUnfolderBase]: For 9868/9868 co-relation queries the response was YES. [2025-03-04 01:59:19,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 1466 events. 937/1466 cut-off events. For 9868/9868 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5342 event pairs, 39 based on Foata normal form. 32/1477 useless extension candidates. Maximal degree in co-relation 4477. Up to 273 conditions per place. [2025-03-04 01:59:19,535 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 211 selfloop transitions, 25 changer transitions 0/241 dead transitions. [2025-03-04 01:59:19,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 241 transitions, 1162 flow [2025-03-04 01:59:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-04 01:59:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-04 01:59:19,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 420 transitions. [2025-03-04 01:59:19,538 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5570291777188329 [2025-03-04 01:59:19,538 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 26 states and 420 transitions. [2025-03-04 01:59:19,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 241 transitions, 1162 flow [2025-03-04 01:59:19,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 241 transitions, 1062 flow, removed 39 selfloop flow, removed 11 redundant places. [2025-03-04 01:59:19,553 INFO L231 Difference]: Finished difference. Result has 99 places, 49 transitions, 266 flow [2025-03-04 01:59:19,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=266, PETRI_PLACES=99, PETRI_TRANSITIONS=49} [2025-03-04 01:59:19,555 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2025-03-04 01:59:19,555 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 49 transitions, 266 flow [2025-03-04 01:59:19,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.384615384615385) internal successors, (218), 26 states have internal predecessors, (218), 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) [2025-03-04 01:59:19,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:19,556 INFO L206 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:19,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 01:59:19,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:19,756 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:19,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1951487898, now seen corresponding path program 5 times [2025-03-04 01:59:19,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:19,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166740489] [2025-03-04 01:59:19,757 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 01:59:19,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:19,764 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 13 equivalence classes. [2025-03-04 01:59:19,850 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 01:59:19,851 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-04 01:59:19,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:21,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:21,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166740489] [2025-03-04 01:59:21,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166740489] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:21,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083219050] [2025-03-04 01:59:21,404 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 01:59:21,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:21,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:21,406 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) [2025-03-04 01:59:21,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 01:59:21,443 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 13 equivalence classes. [2025-03-04 01:59:21,473 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 01:59:21,473 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-04 01:59:21,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:21,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-03-04 01:59:21,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:22,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:24,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083219050] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:24,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:24,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 90 [2025-03-04 01:59:24,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768047716] [2025-03-04 01:59:24,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:24,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2025-03-04 01:59:24,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:24,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2025-03-04 01:59:24,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1169, Invalid=7021, Unknown=0, NotChecked=0, Total=8190 [2025-03-04 01:59:24,370 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-04 01:59:24,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 49 transitions, 266 flow. Second operand has 91 states, 91 states have (on average 6.175824175824176) internal successors, (562), 91 states have internal predecessors, (562), 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) [2025-03-04 01:59:24,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:24,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-04 01:59:24,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand