./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/fib_unsafe-6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 854e371c98b43d805c328b457758892c4a501d7b326c2672c089850792494a4b --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 13:57:58,273 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 13:57:58,318 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 13:57:58,322 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 13:57:58,322 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 13:57:58,336 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 13:57:58,337 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 13:57:58,337 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 13:57:58,337 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 13:57:58,337 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 13:57:58,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 13:57:58,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 13:57:58,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 13:57:58,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 13:57:58,338 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 13:57:58,339 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 13:57:58,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 13:57:58,339 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 13:57:58,339 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 854e371c98b43d805c328b457758892c4a501d7b326c2672c089850792494a4b [2025-03-17 13:57:58,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 13:57:58,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 13:57:58,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 13:57:58,591 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 13:57:58,591 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 13:57:58,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-6.i [2025-03-17 13:57:59,738 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/933ff9b88/47c16ddcf78e4a5db0d7f2bffaa9b825/FLAG21ee935aa [2025-03-17 13:57:59,987 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 13:57:59,988 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-6.i [2025-03-17 13:57:59,997 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/933ff9b88/47c16ddcf78e4a5db0d7f2bffaa9b825/FLAG21ee935aa [2025-03-17 13:58:00,313 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/933ff9b88/47c16ddcf78e4a5db0d7f2bffaa9b825 [2025-03-17 13:58:00,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 13:58:00,316 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 13:58:00,317 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 13:58:00,317 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 13:58:00,320 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 13:58:00,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a9f603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00, skipping insertion in model container [2025-03-17 13:58:00,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,347 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 13:58:00,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 13:58:00,597 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 13:58:00,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 13:58:00,658 INFO L204 MainTranslator]: Completed translation [2025-03-17 13:58:00,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00 WrapperNode [2025-03-17 13:58:00,658 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 13:58:00,659 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 13:58:00,659 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 13:58:00,659 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 13:58:00,663 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,670 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,684 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2025-03-17 13:58:00,685 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 13:58:00,685 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 13:58:00,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 13:58:00,685 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 13:58:00,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,692 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,702 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 13:58:00,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,705 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,709 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 13:58:00,711 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 13:58:00,714 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 13:58:00,714 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 13:58:00,715 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (1/1) ... [2025-03-17 13:58:00,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 13:58:00,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:58:00,736 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 13:58:00,738 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 13:58:00,753 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-17 13:58:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-17 13:58:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-17 13:58:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-17 13:58:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 13:58:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 13:58:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 13:58:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 13:58:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 13:58:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 13:58:00,755 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 13:58:00,835 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 13:58:00,837 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 13:58:00,986 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 13:58:00,986 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 13:58:01,048 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 13:58:01,049 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 13:58:01,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 01:58:01 BoogieIcfgContainer [2025-03-17 13:58:01,049 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 13:58:01,051 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 13:58:01,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 13:58:01,054 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 13:58:01,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 01:58:00" (1/3) ... [2025-03-17 13:58:01,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec80ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 01:58:01, skipping insertion in model container [2025-03-17 13:58:01,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:58:00" (2/3) ... [2025-03-17 13:58:01,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec80ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 01:58:01, skipping insertion in model container [2025-03-17 13:58:01,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 01:58:01" (3/3) ... [2025-03-17 13:58:01,056 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2025-03-17 13:58:01,067 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 13:58:01,069 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-6.i that has 3 procedures, 30 locations, 1 initial locations, 3 loop locations, and 2 error locations. [2025-03-17 13:58:01,069 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 13:58:01,097 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 13:58:01,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 76 flow [2025-03-17 13:58:01,150 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-03-17 13:58:01,151 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 13:58:01,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 5/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-03-17 13:58:01,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 76 flow [2025-03-17 13:58:01,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 70 flow [2025-03-17 13:58:01,162 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 13:58:01,170 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=None, 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;@7397ef9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 13:58:01,170 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 13:58:01,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 13:58:01,181 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2025-03-17 13:58:01,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 13:58:01,182 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:58:01,182 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:58:01,183 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:58:01,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:58:01,187 INFO L85 PathProgramCache]: Analyzing trace with hash -782702448, now seen corresponding path program 1 times [2025-03-17 13:58:01,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:58:01,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892760689] [2025-03-17 13:58:01,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:58:01,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:58:01,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 13:58:01,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 13:58:01,263 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:58:01,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:01,387 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 13:58:01,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:58:01,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892760689] [2025-03-17 13:58:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892760689] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 13:58:01,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 13:58:01,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 13:58:01,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429849916] [2025-03-17 13:58:01,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 13:58:01,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 13:58:01,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:58:01,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 13:58:01,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 13:58:01,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 13:58:01,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:58:01,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:58:01,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 13:58:01,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:58:01,576 INFO L124 PetriNetUnfolderBase]: 297/523 cut-off events. [2025-03-17 13:58:01,576 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 13:58:01,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 523 events. 297/523 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2146 event pairs, 39 based on Foata normal form. 32/534 useless extension candidates. Maximal degree in co-relation 974. Up to 353 conditions per place. [2025-03-17 13:58:01,584 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 29 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2025-03-17 13:58:01,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 146 flow [2025-03-17 13:58:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 13:58:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 13:58:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2025-03-17 13:58:01,593 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2025-03-17 13:58:01,594 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 59 transitions. [2025-03-17 13:58:01,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 146 flow [2025-03-17 13:58:01,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 13:58:01,600 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 72 flow [2025-03-17 13:58:01,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2025-03-17 13:58:01,605 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2025-03-17 13:58:01,606 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 72 flow [2025-03-17 13:58:01,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:58:01,606 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:58:01,606 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:58:01,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 13:58:01,606 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:58:01,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:58:01,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1732255421, now seen corresponding path program 1 times [2025-03-17 13:58:01,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:58:01,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629208438] [2025-03-17 13:58:01,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:58:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:58:01,615 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 13:58:01,624 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 13:58:01,624 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:58:01,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:01,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:58:01,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629208438] [2025-03-17 13:58:01,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629208438] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:58:01,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105075785] [2025-03-17 13:58:01,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:58:01,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:58:01,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:58:01,718 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 13:58:01,720 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 13:58:01,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 13:58:01,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 13:58:01,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:58:01,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:01,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-17 13:58:01,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:58:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 13:58:01,820 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 13:58:01,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105075785] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 13:58:01,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 13:58:01,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2025-03-17 13:58:01,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680297733] [2025-03-17 13:58:01,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 13:58:01,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 13:58:01,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:58:01,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 13:58:01,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 13:58:01,822 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 13:58:01,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:58:01,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:58:01,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 13:58:01,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:58:01,873 INFO L124 PetriNetUnfolderBase]: 265/459 cut-off events. [2025-03-17 13:58:01,873 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 13:58:01,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 459 events. 265/459 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1777 event pairs, 183 based on Foata normal form. 16/454 useless extension candidates. Maximal degree in co-relation 926. Up to 405 conditions per place. [2025-03-17 13:58:01,875 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 21 selfloop transitions, 1 changer transitions 1/28 dead transitions. [2025-03-17 13:58:01,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 116 flow [2025-03-17 13:58:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 13:58:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 13:58:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2025-03-17 13:58:01,876 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2025-03-17 13:58:01,876 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 72 flow. Second operand 3 states and 44 transitions. [2025-03-17 13:58:01,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 116 flow [2025-03-17 13:58:01,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 13:58:01,877 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 68 flow [2025-03-17 13:58:01,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2025-03-17 13:58:01,878 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2025-03-17 13:58:01,878 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 68 flow [2025-03-17 13:58:01,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:58:01,878 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:58:01,878 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:58:01,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 13:58:02,080 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 [2025-03-17 13:58:02,081 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:58:02,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:58:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1732256997, now seen corresponding path program 1 times [2025-03-17 13:58:02,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:58:02,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222546310] [2025-03-17 13:58:02,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:58:02,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:58:02,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 13:58:02,097 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 13:58:02,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:58:02,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:02,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:58:02,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222546310] [2025-03-17 13:58:02,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222546310] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:58:02,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699649585] [2025-03-17 13:58:02,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:58:02,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:58:02,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:58:02,160 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 13:58:02,161 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 13:58:02,196 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 13:58:02,208 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 13:58:02,208 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:58:02,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:02,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 13:58:02,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:58:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:02,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:58:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:02,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699649585] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:58:02,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:58:02,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-17 13:58:02,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527207327] [2025-03-17 13:58:02,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:58:02,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 13:58:02,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:58:02,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 13:58:02,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-17 13:58:02,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 13:58:02,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 68 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 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 13:58:02,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:58:02,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 13:58:02,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:58:02,399 INFO L124 PetriNetUnfolderBase]: 329/555 cut-off events. [2025-03-17 13:58:02,399 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 13:58:02,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 555 events. 329/555 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2089 event pairs, 39 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1160. Up to 257 conditions per place. [2025-03-17 13:58:02,401 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 52 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2025-03-17 13:58:02,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 258 flow [2025-03-17 13:58:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 13:58:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 13:58:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2025-03-17 13:58:02,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2025-03-17 13:58:02,402 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 68 flow. Second operand 6 states and 108 transitions. [2025-03-17 13:58:02,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 258 flow [2025-03-17 13:58:02,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 13:58:02,403 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 103 flow [2025-03-17 13:58:02,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2025-03-17 13:58:02,404 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2025-03-17 13:58:02,404 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 103 flow [2025-03-17 13:58:02,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 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 13:58:02,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:58:02,404 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:58:02,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 13:58:02,604 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 [2025-03-17 13:58:02,605 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:58:02,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:58:02,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1400139272, now seen corresponding path program 2 times [2025-03-17 13:58:02,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:58:02,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117275451] [2025-03-17 13:58:02,605 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 13:58:02,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:58:02,618 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 13:58:02,640 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 13:58:02,640 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 13:58:02,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:02,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:58:02,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117275451] [2025-03-17 13:58:02,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117275451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:58:02,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075713039] [2025-03-17 13:58:02,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 13:58:02,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:58:02,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:58:02,713 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 13:58:02,715 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 13:58:02,750 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 13:58:02,763 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 13:58:02,763 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 13:58:02,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:02,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 13:58:02,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:58:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:02,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:58:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:02,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075713039] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:58:02,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:58:02,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-17 13:58:02,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558336097] [2025-03-17 13:58:02,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:58:02,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 13:58:02,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:58:02,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 13:58:02,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-17 13:58:02,838 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 13:58:02,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 103 flow. Second operand has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 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 13:58:02,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:58:02,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 13:58:02,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:58:03,014 INFO L124 PetriNetUnfolderBase]: 521/843 cut-off events. [2025-03-17 13:58:03,014 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-17 13:58:03,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 843 events. 521/843 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3087 event pairs, 39 based on Foata normal form. 96/934 useless extension candidates. Maximal degree in co-relation 2104. Up to 257 conditions per place. [2025-03-17 13:58:03,034 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 100 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2025-03-17 13:58:03,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 116 transitions, 521 flow [2025-03-17 13:58:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 13:58:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 13:58:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2025-03-17 13:58:03,036 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2025-03-17 13:58:03,036 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 103 flow. Second operand 12 states and 213 transitions. [2025-03-17 13:58:03,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 116 transitions, 521 flow [2025-03-17 13:58:03,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 116 transitions, 507 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-17 13:58:03,040 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 173 flow [2025-03-17 13:58:03,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2025-03-17 13:58:03,040 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2025-03-17 13:58:03,040 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 173 flow [2025-03-17 13:58:03,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 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 13:58:03,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:58:03,041 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:58:03,047 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 13:58:03,241 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 [2025-03-17 13:58:03,241 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:58:03,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:58:03,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1716632280, now seen corresponding path program 3 times [2025-03-17 13:58:03,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:58:03,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516939801] [2025-03-17 13:58:03,242 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 13:58:03,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:58:03,248 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-03-17 13:58:03,273 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 13:58:03,274 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 13:58:03,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:03,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:58:03,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516939801] [2025-03-17 13:58:03,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516939801] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:58:03,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113913983] [2025-03-17 13:58:03,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 13:58:03,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:58:03,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:58:03,445 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 13:58:03,447 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 13:58:03,498 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-03-17 13:58:03,522 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 13:58:03,522 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 13:58:03,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:03,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 13:58:03,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:58:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:03,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:58:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:03,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113913983] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:58:03,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:58:03,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2025-03-17 13:58:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171641609] [2025-03-17 13:58:03,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:58:03,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 13:58:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:58:03,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 13:58:03,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-03-17 13:58:03,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 13:58:03,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 173 flow. Second operand has 17 states, 17 states have (on average 9.705882352941176) internal successors, (165), 17 states have internal predecessors, (165), 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 13:58:03,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:58:03,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 13:58:03,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:58:03,906 INFO L124 PetriNetUnfolderBase]: 649/1035 cut-off events. [2025-03-17 13:58:03,906 INFO L125 PetriNetUnfolderBase]: For 2860/2860 co-relation queries the response was YES. [2025-03-17 13:58:03,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 1035 events. 649/1035 cut-off events. For 2860/2860 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3819 event pairs, 39 based on Foata normal form. 64/1094 useless extension candidates. Maximal degree in co-relation 2952. Up to 257 conditions per place. [2025-03-17 13:58:03,912 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 132 selfloop transitions, 15 changer transitions 0/152 dead transitions. [2025-03-17 13:58:03,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 152 transitions, 723 flow [2025-03-17 13:58:03,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 13:58:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 13:58:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 279 transitions. [2025-03-17 13:58:03,913 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128676470588235 [2025-03-17 13:58:03,913 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 173 flow. Second operand 16 states and 279 transitions. [2025-03-17 13:58:03,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 152 transitions, 723 flow [2025-03-17 13:58:03,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 152 transitions, 667 flow, removed 23 selfloop flow, removed 5 redundant places. [2025-03-17 13:58:03,923 INFO L231 Difference]: Finished difference. Result has 69 places, 40 transitions, 197 flow [2025-03-17 13:58:03,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=197, PETRI_PLACES=69, PETRI_TRANSITIONS=40} [2025-03-17 13:58:03,924 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 35 predicate places. [2025-03-17 13:58:03,924 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 40 transitions, 197 flow [2025-03-17 13:58:03,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.705882352941176) internal successors, (165), 17 states have internal predecessors, (165), 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 13:58:03,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:58:03,924 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:58:03,935 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 13:58:04,124 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 [2025-03-17 13:58:04,125 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:58:04,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:58:04,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1107381784, now seen corresponding path program 4 times [2025-03-17 13:58:04,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:58:04,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871459910] [2025-03-17 13:58:04,125 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 13:58:04,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:58:04,132 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 13:58:04,152 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 13:58:04,152 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 13:58:04,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:05,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:58:05,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871459910] [2025-03-17 13:58:05,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871459910] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:58:05,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332504703] [2025-03-17 13:58:05,049 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 13:58:05,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:58:05,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:58:05,050 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 13:58:05,059 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 13:58:05,088 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 13:58:05,109 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 13:58:05,109 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 13:58:05,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:05,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-17 13:58:05,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:58:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:05,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:58:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:06,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332504703] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:58:06,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:58:06,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2025-03-17 13:58:06,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206581886] [2025-03-17 13:58:06,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:58:06,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2025-03-17 13:58:06,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:58:06,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2025-03-17 13:58:06,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=3288, Unknown=0, NotChecked=0, Total=3782 [2025-03-17 13:58:06,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 13:58:06,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 40 transitions, 197 flow. Second operand has 62 states, 62 states have (on average 8.258064516129032) internal successors, (512), 62 states have internal predecessors, (512), 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 13:58:06,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:58:06,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 13:58:06,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:58:20,310 INFO L124 PetriNetUnfolderBase]: 15598/25719 cut-off events. [2025-03-17 13:58:20,310 INFO L125 PetriNetUnfolderBase]: For 54615/54615 co-relation queries the response was YES. [2025-03-17 13:58:20,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67891 conditions, 25719 events. 15598/25719 cut-off events. For 54615/54615 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 168036 event pairs, 104 based on Foata normal form. 0/25391 useless extension candidates. Maximal degree in co-relation 67868. Up to 3297 conditions per place. [2025-03-17 13:58:20,487 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 569 selfloop transitions, 574 changer transitions 701/1848 dead transitions. [2025-03-17 13:58:20,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1848 transitions, 10950 flow [2025-03-17 13:58:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2025-03-17 13:58:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2025-03-17 13:58:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 2677 transitions. [2025-03-17 13:58:20,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45250169033130494 [2025-03-17 13:58:20,498 INFO L175 Difference]: Start difference. First operand has 69 places, 40 transitions, 197 flow. Second operand 174 states and 2677 transitions. [2025-03-17 13:58:20,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1848 transitions, 10950 flow [2025-03-17 13:58:20,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 1848 transitions, 9424 flow, removed 442 selfloop flow, removed 11 redundant places. [2025-03-17 13:58:20,578 INFO L231 Difference]: Finished difference. Result has 301 places, 667 transitions, 4021 flow [2025-03-17 13:58:20,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=174, PETRI_FLOW=4021, PETRI_PLACES=301, PETRI_TRANSITIONS=667} [2025-03-17 13:58:20,579 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 267 predicate places. [2025-03-17 13:58:20,579 INFO L471 AbstractCegarLoop]: Abstraction has has 301 places, 667 transitions, 4021 flow [2025-03-17 13:58:20,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 8.258064516129032) internal successors, (512), 62 states have internal predecessors, (512), 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 13:58:20,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:58:20,580 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:58:20,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 13:58:20,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:58:20,785 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:58:20,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:58:20,786 INFO L85 PathProgramCache]: Analyzing trace with hash -882376740, now seen corresponding path program 1 times [2025-03-17 13:58:20,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:58:20,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94914996] [2025-03-17 13:58:20,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:58:20,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:58:20,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 13:58:20,803 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 13:58:20,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:58:20,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:21,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:58:21,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94914996] [2025-03-17 13:58:21,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94914996] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:58:21,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855409705] [2025-03-17 13:58:21,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:58:21,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:58:21,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:58:21,504 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 13:58:21,507 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 13:58:21,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 13:58:21,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 13:58:21,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:58:21,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:21,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-17 13:58:21,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:58:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 78 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:22,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:58:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855409705] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:58:23,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:58:23,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2025-03-17 13:58:23,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014759704] [2025-03-17 13:58:23,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:58:23,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2025-03-17 13:58:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:58:23,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2025-03-17 13:58:23,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=4004, Unknown=0, NotChecked=0, Total=4556 [2025-03-17 13:58:23,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 13:58:23,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 667 transitions, 4021 flow. Second operand has 68 states, 68 states have (on average 8.323529411764707) internal successors, (566), 68 states have internal predecessors, (566), 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 13:58:23,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:58:23,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 13:58:23,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand