./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --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/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:30:07,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:30:07,577 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:30:07,582 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:30:07,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:30:07,607 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:30:07,608 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:30:07,608 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:30:07,609 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:30:07,609 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:30:07,609 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:30:07,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:30:07,609 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:30:07,610 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:30:07,610 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:30:07,611 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:30:07,611 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:30:07,611 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:30:07,611 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:30:07,611 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:30:07,611 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:30:07,611 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:30:07,612 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:30:07,612 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:30:07,612 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:30:07,612 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:30:07,612 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:30:07,612 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:30:07,612 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:30:07,612 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:30:07,612 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:30:07,612 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 -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2025-03-17 14:30:07,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:30:07,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:30:07,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:30:07,849 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:30:07,849 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:30:07,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-17 14:30:08,973 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99d30309b/1bc595534a204abc886a53979b5c9fe6/FLAG3e0065fae [2025-03-17 14:30:09,188 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:30:09,189 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-17 14:30:09,224 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99d30309b/1bc595534a204abc886a53979b5c9fe6/FLAG3e0065fae [2025-03-17 14:30:09,536 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99d30309b/1bc595534a204abc886a53979b5c9fe6 [2025-03-17 14:30:09,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:30:09,539 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:30:09,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:30:09,540 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:30:09,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:30:09,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42284e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09, skipping insertion in model container [2025-03-17 14:30:09,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,556 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:30:09,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:30:09,676 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:30:09,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:30:09,706 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:30:09,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09 WrapperNode [2025-03-17 14:30:09,707 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:30:09,708 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:30:09,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:30:09,708 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:30:09,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,717 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,729 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 46 [2025-03-17 14:30:09,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:30:09,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:30:09,731 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:30:09,731 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:30:09,736 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,739 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,748 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 14:30:09,748 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,748 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,753 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,754 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,755 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,755 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:30:09,757 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:30:09,757 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:30:09,757 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:30:09,757 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (1/1) ... [2025-03-17 14:30:09,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:30:09,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:09,783 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 14:30:09,785 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 14:30:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:30:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:30:09,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:30:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:30:09,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:30:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:30:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:30:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:30:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:30:09,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:30:09,802 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 14:30:09,851 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:30:09,853 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:30:09,964 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:30:09,964 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:30:10,065 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:30:10,065 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:30:10,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:30:10 BoogieIcfgContainer [2025-03-17 14:30:10,066 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:30:10,068 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:30:10,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:30:10,071 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:30:10,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:30:09" (1/3) ... [2025-03-17 14:30:10,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1704db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:30:10, skipping insertion in model container [2025-03-17 14:30:10,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:09" (2/3) ... [2025-03-17 14:30:10,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1704db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:30:10, skipping insertion in model container [2025-03-17 14:30:10,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:30:10" (3/3) ... [2025-03-17 14:30:10,073 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-17 14:30:10,082 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:30:10,083 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-nonblocking-counter-alt2.wvr.c that has 3 procedures, 22 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-03-17 14:30:10,083 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:30:10,119 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:30:10,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2025-03-17 14:30:10,165 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2025-03-17 14:30:10,173 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:30:10,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-03-17 14:30:10,175 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2025-03-17 14:30:10,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2025-03-17 14:30:10,182 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:30:10,190 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;@3dd3231e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:30:10,190 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 14:30:10,198 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:30:10,198 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-03-17 14:30:10,198 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:30:10,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:10,199 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:10,200 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:10,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1100337979, now seen corresponding path program 1 times [2025-03-17 14:30:10,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:10,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779917396] [2025-03-17 14:30:10,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:10,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:10,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:30:10,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:30:10,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:10,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:10,479 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 14:30:10,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:10,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779917396] [2025-03-17 14:30:10,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779917396] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:10,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:10,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:30:10,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009230121] [2025-03-17 14:30:10,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:10,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:30:10,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:10,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:30:10,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:30:10,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2025-03-17 14:30:10,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 14:30:10,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:10,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2025-03-17 14:30:10,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:10,595 INFO L124 PetriNetUnfolderBase]: 73/147 cut-off events. [2025-03-17 14:30:10,596 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-17 14:30:10,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 147 events. 73/147 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 437 event pairs, 22 based on Foata normal form. 2/148 useless extension candidates. Maximal degree in co-relation 255. Up to 74 conditions per place. [2025-03-17 14:30:10,600 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2025-03-17 14:30:10,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2025-03-17 14:30:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:30:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:30:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2025-03-17 14:30:10,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2025-03-17 14:30:10,612 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 3 states and 45 transitions. [2025-03-17 14:30:10,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2025-03-17 14:30:10,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:30:10,617 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2025-03-17 14:30:10,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2025-03-17 14:30:10,623 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2025-03-17 14:30:10,623 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2025-03-17 14:30:10,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 14:30:10,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:10,623 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:10,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:30:10,624 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:10,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1905066673, now seen corresponding path program 1 times [2025-03-17 14:30:10,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:10,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057881043] [2025-03-17 14:30:10,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:10,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:10,630 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:30:10,642 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:30:10,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:10,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:10,761 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 14:30:10,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:10,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057881043] [2025-03-17 14:30:10,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057881043] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:10,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:10,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:30:10,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010719495] [2025-03-17 14:30:10,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:10,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:30:10,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:10,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:30:10,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:30:10,771 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:10,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 14:30:10,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:10,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:10,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:10,883 INFO L124 PetriNetUnfolderBase]: 173/302 cut-off events. [2025-03-17 14:30:10,883 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2025-03-17 14:30:10,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 302 events. 173/302 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 986 event pairs, 93 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 282. Up to 213 conditions per place. [2025-03-17 14:30:10,885 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 25 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2025-03-17 14:30:10,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 29 transitions, 134 flow [2025-03-17 14:30:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:30:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:30:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2025-03-17 14:30:10,889 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4673913043478261 [2025-03-17 14:30:10,889 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 43 transitions. [2025-03-17 14:30:10,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 29 transitions, 134 flow [2025-03-17 14:30:10,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:30:10,890 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2025-03-17 14:30:10,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2025-03-17 14:30:10,891 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2025-03-17 14:30:10,891 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2025-03-17 14:30:10,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 14:30:10,891 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:10,891 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:10,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:30:10,892 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:10,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1416754747, now seen corresponding path program 1 times [2025-03-17 14:30:10,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:10,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739266118] [2025-03-17 14:30:10,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:10,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:10,901 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:30:10,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:30:10,913 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:10,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:11,176 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 14:30:11,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:11,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739266118] [2025-03-17 14:30:11,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739266118] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:11,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227338592] [2025-03-17 14:30:11,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:11,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:11,183 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 14:30:11,184 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 14:30:11,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:30:11,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:30:11,228 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:11,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:11,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:30:11,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:11,320 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 14:30:11,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:11,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227338592] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:11,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:30:11,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 12 [2025-03-17 14:30:11,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384505079] [2025-03-17 14:30:11,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:11,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:30:11,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:11,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:30:11,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:30:11,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2025-03-17 14:30:11,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 14:30:11,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:11,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2025-03-17 14:30:11,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:11,589 INFO L124 PetriNetUnfolderBase]: 207/386 cut-off events. [2025-03-17 14:30:11,589 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2025-03-17 14:30:11,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 386 events. 207/386 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1485 event pairs, 55 based on Foata normal form. 1/349 useless extension candidates. Maximal degree in co-relation 258. Up to 156 conditions per place. [2025-03-17 14:30:11,592 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 36 selfloop transitions, 6 changer transitions 3/47 dead transitions. [2025-03-17 14:30:11,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 240 flow [2025-03-17 14:30:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:30:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:30:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2025-03-17 14:30:11,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2025-03-17 14:30:11,595 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 62 transitions. [2025-03-17 14:30:11,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 240 flow [2025-03-17 14:30:11,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:30:11,597 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 106 flow [2025-03-17 14:30:11,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2025-03-17 14:30:11,599 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2025-03-17 14:30:11,599 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 106 flow [2025-03-17 14:30:11,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 14:30:11,600 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:11,600 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:11,607 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 14:30:11,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:11,801 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:11,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:11,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1177238555, now seen corresponding path program 2 times [2025-03-17 14:30:11,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:11,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163495593] [2025-03-17 14:30:11,802 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:11,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:11,809 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 14:30:11,821 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:30:11,823 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:11,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:12,000 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 14:30:12,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:12,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163495593] [2025-03-17 14:30:12,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163495593] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:12,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286738941] [2025-03-17 14:30:12,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:12,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:12,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:12,003 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 14:30:12,005 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 14:30:12,033 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 14:30:12,045 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:30:12,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:12,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:12,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:30:12,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:12,097 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 14:30:12,097 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:30:12,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286738941] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:12,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:30:12,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2025-03-17 14:30:12,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414962237] [2025-03-17 14:30:12,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:12,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:30:12,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:12,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:30:12,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:30:12,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:12,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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 14:30:12,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:12,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:12,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:12,219 INFO L124 PetriNetUnfolderBase]: 263/458 cut-off events. [2025-03-17 14:30:12,219 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2025-03-17 14:30:12,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 458 events. 263/458 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1613 event pairs, 81 based on Foata normal form. 6/430 useless extension candidates. Maximal degree in co-relation 437. Up to 380 conditions per place. [2025-03-17 14:30:12,222 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 36 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2025-03-17 14:30:12,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 260 flow [2025-03-17 14:30:12,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:30:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:30:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2025-03-17 14:30:12,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2025-03-17 14:30:12,223 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 106 flow. Second operand 6 states and 64 transitions. [2025-03-17 14:30:12,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 260 flow [2025-03-17 14:30:12,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-17 14:30:12,225 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 154 flow [2025-03-17 14:30:12,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2025-03-17 14:30:12,225 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2025-03-17 14:30:12,225 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 154 flow [2025-03-17 14:30:12,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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 14:30:12,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:12,226 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:12,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:12,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-17 14:30:12,430 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:12,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash 568147049, now seen corresponding path program 3 times [2025-03-17 14:30:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:12,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925465790] [2025-03-17 14:30:12,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:30:12,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:12,435 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-17 14:30:12,441 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:30:12,442 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:30:12,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:12,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925465790] [2025-03-17 14:30:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925465790] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584827779] [2025-03-17 14:30:12,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:30:12,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:12,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:12,606 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 14:30:12,608 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 14:30:12,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-17 14:30:12,642 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:30:12,642 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:30:12,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:12,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:30:12,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:12,708 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 14:30:12,708 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:30:12,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584827779] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:12,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:30:12,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2025-03-17 14:30:12,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381303339] [2025-03-17 14:30:12,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:12,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:30:12,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:12,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:30:12,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:30:12,717 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:12,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 154 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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 14:30:12,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:12,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:12,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:12,865 INFO L124 PetriNetUnfolderBase]: 367/634 cut-off events. [2025-03-17 14:30:12,865 INFO L125 PetriNetUnfolderBase]: For 788/788 co-relation queries the response was YES. [2025-03-17 14:30:12,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 634 events. 367/634 cut-off events. For 788/788 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2463 event pairs, 92 based on Foata normal form. 18/652 useless extension candidates. Maximal degree in co-relation 1619. Up to 408 conditions per place. [2025-03-17 14:30:12,872 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 44 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2025-03-17 14:30:12,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 372 flow [2025-03-17 14:30:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:30:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:30:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2025-03-17 14:30:12,873 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.453416149068323 [2025-03-17 14:30:12,874 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 154 flow. Second operand 7 states and 73 transitions. [2025-03-17 14:30:12,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 372 flow [2025-03-17 14:30:12,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 361 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-17 14:30:12,878 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 212 flow [2025-03-17 14:30:12,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2025-03-17 14:30:12,879 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2025-03-17 14:30:12,880 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 212 flow [2025-03-17 14:30:12,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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 14:30:12,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:12,881 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:12,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:13,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:13,082 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:13,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1196869493, now seen corresponding path program 4 times [2025-03-17 14:30:13,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:13,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035909646] [2025-03-17 14:30:13,083 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:30:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:13,089 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:13,102 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:13,102 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:30:13,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:13,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:13,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035909646] [2025-03-17 14:30:13,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035909646] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:13,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625127808] [2025-03-17 14:30:13,248 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:30:13,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:13,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:13,250 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 14:30:13,251 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 14:30:13,279 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:13,291 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:13,291 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:30:13,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:13,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:13,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:13,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:13,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625127808] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:13,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:13,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2025-03-17 14:30:13,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491031411] [2025-03-17 14:30:13,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:13,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:30:13,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:13,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:30:13,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:30:13,527 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:13,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 212 flow. Second operand has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:13,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:13,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:13,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:14,282 INFO L124 PetriNetUnfolderBase]: 662/1103 cut-off events. [2025-03-17 14:30:14,283 INFO L125 PetriNetUnfolderBase]: For 1767/1767 co-relation queries the response was YES. [2025-03-17 14:30:14,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3508 conditions, 1103 events. 662/1103 cut-off events. For 1767/1767 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4693 event pairs, 3 based on Foata normal form. 33/1136 useless extension candidates. Maximal degree in co-relation 2907. Up to 205 conditions per place. [2025-03-17 14:30:14,290 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 95 selfloop transitions, 84 changer transitions 18/198 dead transitions. [2025-03-17 14:30:14,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 198 transitions, 1397 flow [2025-03-17 14:30:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 14:30:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-17 14:30:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 274 transitions. [2025-03-17 14:30:14,293 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44122383252818037 [2025-03-17 14:30:14,293 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 212 flow. Second operand 27 states and 274 transitions. [2025-03-17 14:30:14,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 198 transitions, 1397 flow [2025-03-17 14:30:14,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 198 transitions, 1365 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:30:14,299 INFO L231 Difference]: Finished difference. Result has 82 places, 106 transitions, 1013 flow [2025-03-17 14:30:14,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1013, PETRI_PLACES=82, PETRI_TRANSITIONS=106} [2025-03-17 14:30:14,300 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 57 predicate places. [2025-03-17 14:30:14,300 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 106 transitions, 1013 flow [2025-03-17 14:30:14,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:14,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:14,300 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:14,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:14,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:14,504 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:14,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1263516439, now seen corresponding path program 5 times [2025-03-17 14:30:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373754910] [2025-03-17 14:30:14,505 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:30:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:14,509 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:14,519 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:14,520 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:14,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373754910] [2025-03-17 14:30:14,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373754910] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077040412] [2025-03-17 14:30:14,685 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:30:14,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:14,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:14,688 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:14,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:30:14,716 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:14,727 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:14,727 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:14,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:14,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:14,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:14,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:14,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077040412] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:14,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:14,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2025-03-17 14:30:14,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194837043] [2025-03-17 14:30:14,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:14,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:30:14,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:14,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:30:14,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:30:14,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:14,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 106 transitions, 1013 flow. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 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 14:30:14,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:14,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:14,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:16,883 INFO L124 PetriNetUnfolderBase]: 1554/2552 cut-off events. [2025-03-17 14:30:16,883 INFO L125 PetriNetUnfolderBase]: For 23493/23493 co-relation queries the response was YES. [2025-03-17 14:30:16,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13597 conditions, 2552 events. 1554/2552 cut-off events. For 23493/23493 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12961 event pairs, 27 based on Foata normal form. 56/2608 useless extension candidates. Maximal degree in co-relation 11275. Up to 538 conditions per place. [2025-03-17 14:30:16,911 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 205 selfloop transitions, 338 changer transitions 10/554 dead transitions. [2025-03-17 14:30:16,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 554 transitions, 6190 flow [2025-03-17 14:30:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-17 14:30:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-17 14:30:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 474 transitions. [2025-03-17 14:30:16,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42058562555456963 [2025-03-17 14:30:16,914 INFO L175 Difference]: Start difference. First operand has 82 places, 106 transitions, 1013 flow. Second operand 49 states and 474 transitions. [2025-03-17 14:30:16,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 554 transitions, 6190 flow [2025-03-17 14:30:16,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 554 transitions, 5762 flow, removed 208 selfloop flow, removed 4 redundant places. [2025-03-17 14:30:16,991 INFO L231 Difference]: Finished difference. Result has 142 places, 429 transitions, 5241 flow [2025-03-17 14:30:16,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5241, PETRI_PLACES=142, PETRI_TRANSITIONS=429} [2025-03-17 14:30:16,992 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 117 predicate places. [2025-03-17 14:30:16,992 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 429 transitions, 5241 flow [2025-03-17 14:30:16,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 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 14:30:16,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:16,994 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:17,000 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 14:30:17,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:17,195 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:17,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -735038901, now seen corresponding path program 6 times [2025-03-17 14:30:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:17,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680765611] [2025-03-17 14:30:17,195 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:30:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:17,203 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:17,216 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:17,219 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:30:17,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680765611] [2025-03-17 14:30:17,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680765611] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243656657] [2025-03-17 14:30:17,402 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:30:17,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:17,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:17,404 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 14:30:17,406 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 14:30:17,427 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:17,437 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:17,437 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:30:17,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:17,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:17,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:17,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:17,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243656657] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:17,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:17,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-03-17 14:30:17,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66258482] [2025-03-17 14:30:17,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:17,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:30:17,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:17,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:30:17,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:30:17,665 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:17,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 429 transitions, 5241 flow. Second operand has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 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 14:30:17,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:17,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:17,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:18,440 INFO L124 PetriNetUnfolderBase]: 2061/3376 cut-off events. [2025-03-17 14:30:18,440 INFO L125 PetriNetUnfolderBase]: For 34823/34823 co-relation queries the response was YES. [2025-03-17 14:30:18,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21483 conditions, 3376 events. 2061/3376 cut-off events. For 34823/34823 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18521 event pairs, 71 based on Foata normal form. 10/3386 useless extension candidates. Maximal degree in co-relation 21414. Up to 875 conditions per place. [2025-03-17 14:30:18,474 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 262 selfloop transitions, 458 changer transitions 5/726 dead transitions. [2025-03-17 14:30:18,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 726 transitions, 10326 flow [2025-03-17 14:30:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 14:30:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 14:30:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 176 transitions. [2025-03-17 14:30:18,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40274599542334094 [2025-03-17 14:30:18,475 INFO L175 Difference]: Start difference. First operand has 142 places, 429 transitions, 5241 flow. Second operand 19 states and 176 transitions. [2025-03-17 14:30:18,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 726 transitions, 10326 flow [2025-03-17 14:30:18,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 726 transitions, 9090 flow, removed 604 selfloop flow, removed 4 redundant places. [2025-03-17 14:30:18,679 INFO L231 Difference]: Finished difference. Result has 164 places, 648 transitions, 8997 flow [2025-03-17 14:30:18,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8997, PETRI_PLACES=164, PETRI_TRANSITIONS=648} [2025-03-17 14:30:18,681 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 139 predicate places. [2025-03-17 14:30:18,682 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 648 transitions, 8997 flow [2025-03-17 14:30:18,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 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 14:30:18,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:18,683 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:18,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:30:18,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:18,883 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:18,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash 929684845, now seen corresponding path program 7 times [2025-03-17 14:30:18,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:18,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585749234] [2025-03-17 14:30:18,884 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:30:18,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:18,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:30:18,892 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:18,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:18,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585749234] [2025-03-17 14:30:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585749234] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765172407] [2025-03-17 14:30:19,046 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:30:19,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:19,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:19,048 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:19,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:30:19,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:30:19,089 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:19,090 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:19,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:19,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:19,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:19,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:19,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765172407] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:19,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:19,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2025-03-17 14:30:19,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769924541] [2025-03-17 14:30:19,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:19,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:30:19,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:19,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:30:19,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:30:19,280 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:19,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 648 transitions, 8997 flow. Second operand has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 18 states have internal predecessors, (116), 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 14:30:19,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:19,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:19,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:20,647 INFO L124 PetriNetUnfolderBase]: 2717/4466 cut-off events. [2025-03-17 14:30:20,647 INFO L125 PetriNetUnfolderBase]: For 38695/38695 co-relation queries the response was YES. [2025-03-17 14:30:20,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29943 conditions, 4466 events. 2717/4466 cut-off events. For 38695/38695 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25554 event pairs, 30 based on Foata normal form. 94/4560 useless extension candidates. Maximal degree in co-relation 28848. Up to 995 conditions per place. [2025-03-17 14:30:20,686 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 354 selfloop transitions, 769 changer transitions 8/1132 dead transitions. [2025-03-17 14:30:20,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1132 transitions, 17582 flow [2025-03-17 14:30:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-17 14:30:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-03-17 14:30:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 368 transitions. [2025-03-17 14:30:20,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2025-03-17 14:30:20,688 INFO L175 Difference]: Start difference. First operand has 164 places, 648 transitions, 8997 flow. Second operand 37 states and 368 transitions. [2025-03-17 14:30:20,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1132 transitions, 17582 flow [2025-03-17 14:30:20,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 1132 transitions, 17085 flow, removed 248 selfloop flow, removed 1 redundant places. [2025-03-17 14:30:21,007 INFO L231 Difference]: Finished difference. Result has 225 places, 990 transitions, 16740 flow [2025-03-17 14:30:21,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8784, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=16740, PETRI_PLACES=225, PETRI_TRANSITIONS=990} [2025-03-17 14:30:21,008 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 200 predicate places. [2025-03-17 14:30:21,009 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 990 transitions, 16740 flow [2025-03-17 14:30:21,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 18 states have internal predecessors, (116), 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 14:30:21,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:21,009 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:21,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:21,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:21,209 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:21,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash -176856095, now seen corresponding path program 8 times [2025-03-17 14:30:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:21,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526473131] [2025-03-17 14:30:21,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:21,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:21,213 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:21,217 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:21,217 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:21,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:21,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526473131] [2025-03-17 14:30:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526473131] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925259964] [2025-03-17 14:30:21,329 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:21,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:21,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:21,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:21,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:30:21,359 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:21,368 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:21,368 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:21,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:21,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:21,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:21,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:21,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925259964] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:21,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:21,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:30:21,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261171809] [2025-03-17 14:30:21,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:21,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:30:21,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:21,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:30:21,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:30:21,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:21,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 990 transitions, 16740 flow. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:21,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:21,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:21,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:23,352 INFO L124 PetriNetUnfolderBase]: 3710/6166 cut-off events. [2025-03-17 14:30:23,352 INFO L125 PetriNetUnfolderBase]: For 69877/69877 co-relation queries the response was YES. [2025-03-17 14:30:23,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48090 conditions, 6166 events. 3710/6166 cut-off events. For 69877/69877 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38385 event pairs, 59 based on Foata normal form. 64/6230 useless extension candidates. Maximal degree in co-relation 47004. Up to 1354 conditions per place. [2025-03-17 14:30:23,407 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 468 selfloop transitions, 1150 changer transitions 10/1629 dead transitions. [2025-03-17 14:30:23,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1629 transitions, 29961 flow [2025-03-17 14:30:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-17 14:30:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-03-17 14:30:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 326 transitions. [2025-03-17 14:30:23,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4429347826086957 [2025-03-17 14:30:23,408 INFO L175 Difference]: Start difference. First operand has 225 places, 990 transitions, 16740 flow. Second operand 32 states and 326 transitions. [2025-03-17 14:30:23,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1629 transitions, 29961 flow [2025-03-17 14:30:24,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1629 transitions, 29207 flow, removed 368 selfloop flow, removed 2 redundant places. [2025-03-17 14:30:24,456 INFO L231 Difference]: Finished difference. Result has 273 places, 1434 transitions, 28473 flow [2025-03-17 14:30:24,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=16183, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=748, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=28473, PETRI_PLACES=273, PETRI_TRANSITIONS=1434} [2025-03-17 14:30:24,457 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2025-03-17 14:30:24,457 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 1434 transitions, 28473 flow [2025-03-17 14:30:24,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:24,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:24,458 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:24,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 14:30:24,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-17 14:30:24,658 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:24,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1699274507, now seen corresponding path program 9 times [2025-03-17 14:30:24,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:24,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401220828] [2025-03-17 14:30:24,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:30:24,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:24,663 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:24,667 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:24,667 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:30:24,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:24,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:24,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401220828] [2025-03-17 14:30:24,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401220828] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:24,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677107957] [2025-03-17 14:30:24,759 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:30:24,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:24,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:24,761 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:24,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:30:24,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:24,800 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:24,801 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:30:24,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:24,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:24,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:24,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:25,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677107957] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:25,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:25,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2025-03-17 14:30:25,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781998344] [2025-03-17 14:30:25,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:25,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:30:25,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:25,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:30:25,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:30:25,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:25,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 1434 transitions, 28473 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:25,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:25,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:25,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:26,912 INFO L124 PetriNetUnfolderBase]: 3755/6204 cut-off events. [2025-03-17 14:30:26,912 INFO L125 PetriNetUnfolderBase]: For 94288/94288 co-relation queries the response was YES. [2025-03-17 14:30:26,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54888 conditions, 6204 events. 3755/6204 cut-off events. For 94288/94288 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 38441 event pairs, 135 based on Foata normal form. 8/6212 useless extension candidates. Maximal degree in co-relation 54663. Up to 1400 conditions per place. [2025-03-17 14:30:26,973 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 503 selfloop transitions, 1081 changer transitions 4/1589 dead transitions. [2025-03-17 14:30:26,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1589 transitions, 33705 flow [2025-03-17 14:30:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 14:30:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 14:30:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 220 transitions. [2025-03-17 14:30:26,977 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4554865424430642 [2025-03-17 14:30:26,977 INFO L175 Difference]: Start difference. First operand has 273 places, 1434 transitions, 28473 flow. Second operand 21 states and 220 transitions. [2025-03-17 14:30:26,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1589 transitions, 33705 flow [2025-03-17 14:30:28,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1589 transitions, 33396 flow, removed 149 selfloop flow, removed 1 redundant places. [2025-03-17 14:30:28,471 INFO L231 Difference]: Finished difference. Result has 294 places, 1460 transitions, 31667 flow [2025-03-17 14:30:28,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28039, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=31667, PETRI_PLACES=294, PETRI_TRANSITIONS=1460} [2025-03-17 14:30:28,473 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 269 predicate places. [2025-03-17 14:30:28,473 INFO L471 AbstractCegarLoop]: Abstraction has has 294 places, 1460 transitions, 31667 flow [2025-03-17 14:30:28,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:28,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:28,473 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:28,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:28,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:28,673 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:28,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:28,674 INFO L85 PathProgramCache]: Analyzing trace with hash 133366603, now seen corresponding path program 10 times [2025-03-17 14:30:28,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:28,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670599278] [2025-03-17 14:30:28,674 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:30:28,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:28,678 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:28,682 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:28,682 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:30:28,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:28,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:28,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670599278] [2025-03-17 14:30:28,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670599278] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:28,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965041386] [2025-03-17 14:30:28,860 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:30:28,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:28,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:28,862 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:28,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:30:28,887 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:28,897 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:28,897 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:30:28,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:28,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:28,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:29,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965041386] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:29,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:29,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-17 14:30:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198940907] [2025-03-17 14:30:29,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:29,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:30:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:29,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:30:29,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:30:29,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:29,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 1460 transitions, 31667 flow. Second operand has 18 states, 18 states have (on average 6.277777777777778) internal successors, (113), 18 states have internal predecessors, (113), 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 14:30:29,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:29,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:29,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:31,615 INFO L124 PetriNetUnfolderBase]: 4275/7094 cut-off events. [2025-03-17 14:30:31,615 INFO L125 PetriNetUnfolderBase]: For 140045/140045 co-relation queries the response was YES. [2025-03-17 14:30:31,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67696 conditions, 7094 events. 4275/7094 cut-off events. For 140045/140045 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 45246 event pairs, 169 based on Foata normal form. 53/7147 useless extension candidates. Maximal degree in co-relation 67480. Up to 1733 conditions per place. [2025-03-17 14:30:31,679 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 514 selfloop transitions, 1273 changer transitions 8/1796 dead transitions. [2025-03-17 14:30:31,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1796 transitions, 41785 flow [2025-03-17 14:30:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 14:30:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 14:30:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 244 transitions. [2025-03-17 14:30:31,681 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4612476370510397 [2025-03-17 14:30:31,681 INFO L175 Difference]: Start difference. First operand has 294 places, 1460 transitions, 31667 flow. Second operand 23 states and 244 transitions. [2025-03-17 14:30:31,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1796 transitions, 41785 flow [2025-03-17 14:30:33,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1796 transitions, 40806 flow, removed 29 selfloop flow, removed 9 redundant places. [2025-03-17 14:30:33,882 INFO L231 Difference]: Finished difference. Result has 315 places, 1666 transitions, 40760 flow [2025-03-17 14:30:33,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=30820, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1085, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=40760, PETRI_PLACES=315, PETRI_TRANSITIONS=1666} [2025-03-17 14:30:33,883 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 290 predicate places. [2025-03-17 14:30:33,883 INFO L471 AbstractCegarLoop]: Abstraction has has 315 places, 1666 transitions, 40760 flow [2025-03-17 14:30:33,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.277777777777778) internal successors, (113), 18 states have internal predecessors, (113), 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 14:30:33,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:33,884 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:33,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 14:30:34,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-17 14:30:34,084 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:34,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:34,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1272894479, now seen corresponding path program 11 times [2025-03-17 14:30:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:34,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684394866] [2025-03-17 14:30:34,085 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:30:34,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:34,087 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:34,091 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:34,091 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:34,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:34,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:34,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684394866] [2025-03-17 14:30:34,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684394866] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:34,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822862100] [2025-03-17 14:30:34,189 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:30:34,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:34,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:34,191 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:34,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:30:34,216 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:34,225 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:34,225 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:34,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:34,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:34,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:34,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:34,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822862100] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:34,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:34,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2025-03-17 14:30:34,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092735018] [2025-03-17 14:30:34,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:34,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:30:34,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:34,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:30:34,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:30:34,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:34,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1666 transitions, 40760 flow. Second operand has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 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 14:30:34,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:34,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:34,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:37,175 INFO L124 PetriNetUnfolderBase]: 4481/7389 cut-off events. [2025-03-17 14:30:37,175 INFO L125 PetriNetUnfolderBase]: For 179067/179067 co-relation queries the response was YES. [2025-03-17 14:30:37,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77918 conditions, 7389 events. 4481/7389 cut-off events. For 179067/179067 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 46890 event pairs, 258 based on Foata normal form. 14/7403 useless extension candidates. Maximal degree in co-relation 76244. Up to 1896 conditions per place. [2025-03-17 14:30:37,260 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 386 selfloop transitions, 1486 changer transitions 2/1875 dead transitions. [2025-03-17 14:30:37,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1875 transitions, 48587 flow [2025-03-17 14:30:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 14:30:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 14:30:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 211 transitions. [2025-03-17 14:30:37,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43685300207039335 [2025-03-17 14:30:37,262 INFO L175 Difference]: Start difference. First operand has 315 places, 1666 transitions, 40760 flow. Second operand 21 states and 211 transitions. [2025-03-17 14:30:37,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1875 transitions, 48587 flow [2025-03-17 14:30:40,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1875 transitions, 48241 flow, removed 93 selfloop flow, removed 10 redundant places. [2025-03-17 14:30:40,236 INFO L231 Difference]: Finished difference. Result has 333 places, 1785 transitions, 49193 flow [2025-03-17 14:30:40,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=40366, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=49193, PETRI_PLACES=333, PETRI_TRANSITIONS=1785} [2025-03-17 14:30:40,238 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 308 predicate places. [2025-03-17 14:30:40,238 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 1785 transitions, 49193 flow [2025-03-17 14:30:40,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 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 14:30:40,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:40,239 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:40,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:40,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 14:30:40,440 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:40,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash 569151427, now seen corresponding path program 12 times [2025-03-17 14:30:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:40,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234998163] [2025-03-17 14:30:40,440 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:30:40,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:40,443 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:40,452 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:40,452 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:30:40,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:40,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:40,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234998163] [2025-03-17 14:30:40,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234998163] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:40,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270293625] [2025-03-17 14:30:40,540 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:30:40,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:40,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:40,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:40,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:30:40,564 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:30:40,573 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:40,574 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:30:40,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:40,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:40,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:40,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:40,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270293625] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:40,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:40,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2025-03-17 14:30:40,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116837084] [2025-03-17 14:30:40,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:40,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:30:40,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:40,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:30:40,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:30:40,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:40,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1785 transitions, 49193 flow. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 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 14:30:40,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:40,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:40,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:46,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:30:49,596 INFO L124 PetriNetUnfolderBase]: 6602/10912 cut-off events. [2025-03-17 14:30:49,596 INFO L125 PetriNetUnfolderBase]: For 318707/318707 co-relation queries the response was YES. [2025-03-17 14:30:49,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126556 conditions, 10912 events. 6602/10912 cut-off events. For 318707/318707 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 73052 event pairs, 77 based on Foata normal form. 56/10968 useless extension candidates. Maximal degree in co-relation 124144. Up to 3935 conditions per place. [2025-03-17 14:30:49,704 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1175 selfloop transitions, 1815 changer transitions 15/3006 dead transitions. [2025-03-17 14:30:49,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 3006 transitions, 87170 flow [2025-03-17 14:30:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-17 14:30:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-17 14:30:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 481 transitions. [2025-03-17 14:30:49,706 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42679680567879325 [2025-03-17 14:30:49,706 INFO L175 Difference]: Start difference. First operand has 333 places, 1785 transitions, 49193 flow. Second operand 49 states and 481 transitions. [2025-03-17 14:30:49,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 3006 transitions, 87170 flow [2025-03-17 14:30:57,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 3006 transitions, 86604 flow, removed 214 selfloop flow, removed 7 redundant places. [2025-03-17 14:30:57,842 INFO L231 Difference]: Finished difference. Result has 408 places, 2751 transitions, 82939 flow [2025-03-17 14:30:57,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=48811, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=986, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=82939, PETRI_PLACES=408, PETRI_TRANSITIONS=2751} [2025-03-17 14:30:57,844 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 383 predicate places. [2025-03-17 14:30:57,844 INFO L471 AbstractCegarLoop]: Abstraction has has 408 places, 2751 transitions, 82939 flow [2025-03-17 14:30:57,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 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 14:30:57,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:57,845 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:57,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 14:30:58,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 14:30:58,046 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:30:58,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:58,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1097628965, now seen corresponding path program 13 times [2025-03-17 14:30:58,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:58,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38381107] [2025-03-17 14:30:58,046 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:30:58,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:58,050 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:30:58,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:58,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:58,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:58,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:58,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38381107] [2025-03-17 14:30:58,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38381107] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:58,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758839711] [2025-03-17 14:30:58,141 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:30:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:58,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:58,143 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:58,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:30:58,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:30:58,183 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:58,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:58,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:58,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:58,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:58,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:30:58,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758839711] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:58,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:58,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2025-03-17 14:30:58,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881317767] [2025-03-17 14:30:58,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:58,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:30:58,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:58,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:30:58,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:30:58,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:30:58,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 2751 transitions, 82939 flow. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 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 14:30:58,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:58,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:30:58,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:04,875 INFO L124 PetriNetUnfolderBase]: 6816/11286 cut-off events. [2025-03-17 14:31:04,875 INFO L125 PetriNetUnfolderBase]: For 395791/395791 co-relation queries the response was YES. [2025-03-17 14:31:04,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143361 conditions, 11286 events. 6816/11286 cut-off events. For 395791/395791 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 76082 event pairs, 1303 based on Foata normal form. 10/11296 useless extension candidates. Maximal degree in co-relation 143138. Up to 7169 conditions per place. [2025-03-17 14:31:05,043 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 1676 selfloop transitions, 1312 changer transitions 4/2993 dead transitions. [2025-03-17 14:31:05,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 2993 transitions, 94740 flow [2025-03-17 14:31:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:31:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:31:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 140 transitions. [2025-03-17 14:31:05,044 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2025-03-17 14:31:05,044 INFO L175 Difference]: Start difference. First operand has 408 places, 2751 transitions, 82939 flow. Second operand 15 states and 140 transitions. [2025-03-17 14:31:05,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 2993 transitions, 94740 flow [2025-03-17 14:31:15,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 2993 transitions, 93063 flow, removed 768 selfloop flow, removed 6 redundant places. [2025-03-17 14:31:15,796 INFO L231 Difference]: Finished difference. Result has 426 places, 2872 transitions, 90707 flow [2025-03-17 14:31:15,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=81399, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=90707, PETRI_PLACES=426, PETRI_TRANSITIONS=2872} [2025-03-17 14:31:15,799 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 401 predicate places. [2025-03-17 14:31:15,800 INFO L471 AbstractCegarLoop]: Abstraction has has 426 places, 2872 transitions, 90707 flow [2025-03-17 14:31:15,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 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 14:31:15,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:15,800 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:15,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 14:31:16,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 14:31:16,001 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:31:16,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:16,001 INFO L85 PathProgramCache]: Analyzing trace with hash 338322239, now seen corresponding path program 14 times [2025-03-17 14:31:16,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:16,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839664110] [2025-03-17 14:31:16,001 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:16,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:16,005 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:31:16,011 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:31:16,011 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:16,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:16,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839664110] [2025-03-17 14:31:16,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839664110] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457310868] [2025-03-17 14:31:16,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:16,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:16,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:16,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:16,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:31:16,170 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:31:16,179 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:31:16,179 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:16,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:16,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:31:16,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:16,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:16,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457310868] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:16,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:16,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2025-03-17 14:31:16,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816224308] [2025-03-17 14:31:16,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:16,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:31:16,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:16,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:31:16,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:31:16,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:31:16,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 2872 transitions, 90707 flow. Second operand has 16 states, 16 states have (on average 6.1875) internal successors, (99), 16 states have internal predecessors, (99), 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 14:31:16,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:16,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:31:16,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:23,233 INFO L124 PetriNetUnfolderBase]: 7216/11934 cut-off events. [2025-03-17 14:31:23,233 INFO L125 PetriNetUnfolderBase]: For 480380/480380 co-relation queries the response was YES. [2025-03-17 14:31:23,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158860 conditions, 11934 events. 7216/11934 cut-off events. For 480380/480380 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 81346 event pairs, 1343 based on Foata normal form. 14/11948 useless extension candidates. Maximal degree in co-relation 156450. Up to 7383 conditions per place. [2025-03-17 14:31:23,395 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1717 selfloop transitions, 1460 changer transitions 2/3180 dead transitions. [2025-03-17 14:31:23,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 3180 transitions, 105197 flow [2025-03-17 14:31:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 14:31:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 14:31:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 203 transitions. [2025-03-17 14:31:23,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44130434782608696 [2025-03-17 14:31:23,396 INFO L175 Difference]: Start difference. First operand has 426 places, 2872 transitions, 90707 flow. Second operand 20 states and 203 transitions. [2025-03-17 14:31:23,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 3180 transitions, 105197 flow [2025-03-17 14:31:35,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 3180 transitions, 104568 flow, removed 145 selfloop flow, removed 5 redundant places. [2025-03-17 14:31:35,655 INFO L231 Difference]: Finished difference. Result has 450 places, 3030 transitions, 101327 flow [2025-03-17 14:31:35,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=90097, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=101327, PETRI_PLACES=450, PETRI_TRANSITIONS=3030} [2025-03-17 14:31:35,658 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 425 predicate places. [2025-03-17 14:31:35,658 INFO L471 AbstractCegarLoop]: Abstraction has has 450 places, 3030 transitions, 101327 flow [2025-03-17 14:31:35,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.1875) internal successors, (99), 16 states have internal predecessors, (99), 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 14:31:35,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:35,658 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:35,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 14:31:35,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:35,859 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:31:35,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash 518102773, now seen corresponding path program 15 times [2025-03-17 14:31:35,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:35,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798657217] [2025-03-17 14:31:35,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:31:35,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:35,863 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-17 14:31:35,869 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:31:35,869 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 14:31:35,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:36,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:36,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798657217] [2025-03-17 14:31:36,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798657217] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:36,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739611783] [2025-03-17 14:31:36,003 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:31:36,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:36,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:36,005 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:36,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:31:36,030 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-17 14:31:36,038 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:31:36,038 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 14:31:36,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:36,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:31:36,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:36,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:36,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739611783] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:36,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:36,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2025-03-17 14:31:36,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604677202] [2025-03-17 14:31:36,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:36,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:31:36,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:36,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:31:36,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:31:36,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-17 14:31:36,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 3030 transitions, 101327 flow. Second operand has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 19 states have internal predecessors, (125), 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 14:31:36,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:36,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-17 14:31:36,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:47,077 INFO L124 PetriNetUnfolderBase]: 7973/13199 cut-off events. [2025-03-17 14:31:47,078 INFO L125 PetriNetUnfolderBase]: For 632057/632057 co-relation queries the response was YES. [2025-03-17 14:31:47,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185491 conditions, 13199 events. 7973/13199 cut-off events. For 632057/632057 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 91680 event pairs, 781 based on Foata normal form. 81/13280 useless extension candidates. Maximal degree in co-relation 183088. Up to 5317 conditions per place. [2025-03-17 14:31:47,265 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 1767 selfloop transitions, 1710 changer transitions 6/3484 dead transitions. [2025-03-17 14:31:47,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 3484 transitions, 121806 flow [2025-03-17 14:31:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 14:31:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 14:31:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 213 transitions. [2025-03-17 14:31:47,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4409937888198758 [2025-03-17 14:31:47,266 INFO L175 Difference]: Start difference. First operand has 450 places, 3030 transitions, 101327 flow. Second operand 21 states and 213 transitions. [2025-03-17 14:31:47,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 3484 transitions, 121806 flow