./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 e2fb8bed 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-?-e2fb8be-m [2025-03-09 01:27:00,937 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:27:01,009 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:27:01,013 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:27:01,013 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:27:01,029 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:27:01,029 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:27:01,029 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:27:01,029 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:27:01,029 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:27:01,029 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:27:01,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:27:01,030 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:27:01,030 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:27:01,030 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:27:01,031 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:27:01,031 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:27:01,031 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:27:01,031 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:27:01,031 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:27:01,031 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:27:01,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:27:01,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:27:01,032 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:27:01,032 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:27:01,032 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:27:01,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:27:01,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:27:01,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:27:01,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:27:01,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:27:01,032 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 [2025-03-09 01:27:01,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:27:01,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:27:01,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:27:01,320 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:27:01,320 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:27:01,321 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-09 01:27:02,479 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f79a2ad7c/281b550b7b7a4e22b55690ebc4246185/FLAGcaae1b6be [2025-03-09 01:27:02,758 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:27:02,759 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-09 01:27:02,776 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f79a2ad7c/281b550b7b7a4e22b55690ebc4246185/FLAGcaae1b6be [2025-03-09 01:27:03,074 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f79a2ad7c/281b550b7b7a4e22b55690ebc4246185 [2025-03-09 01:27:03,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:27:03,078 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:27:03,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:27:03,079 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:27:03,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:27:03,084 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2379ef08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03, skipping insertion in model container [2025-03-09 01:27:03,085 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,097 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:27:03,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:27:03,236 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:27:03,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:27:03,269 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:27:03,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03 WrapperNode [2025-03-09 01:27:03,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:27:03,271 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:27:03,271 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:27:03,271 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:27:03,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,283 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,297 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 46 [2025-03-09 01:27:03,299 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:27:03,300 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:27:03,300 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:27:03,300 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:27:03,307 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,310 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,326 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]. [2025-03-09 01:27:03,326 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,326 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,330 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,331 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,332 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:27:03,338 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:27:03,339 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:27:03,339 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:27:03,340 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (1/1) ... [2025-03-09 01:27:03,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:27:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:03,368 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) [2025-03-09 01:27:03,370 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 [2025-03-09 01:27:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:27:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 01:27:03,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 01:27:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 01:27:03,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 01:27:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 01:27:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-09 01:27:03,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-09 01:27:03,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:27:03,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:27:03,393 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:27:03,460 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:27:03,463 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:27:03,616 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:27:03,616 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:27:03,741 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:27:03,741 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:27:03,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:27:03 BoogieIcfgContainer [2025-03-09 01:27:03,741 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:27:03,744 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:27:03,744 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:27:03,747 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:27:03,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:27:03" (1/3) ... [2025-03-09 01:27:03,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c1ffaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:27:03, skipping insertion in model container [2025-03-09 01:27:03,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:27:03" (2/3) ... [2025-03-09 01:27:03,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c1ffaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:27:03, skipping insertion in model container [2025-03-09 01:27:03,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:27:03" (3/3) ... [2025-03-09 01:27:03,751 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2025-03-09 01:27:03,762 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:27:03,763 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. [2025-03-09 01:27:03,763 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:27:03,798 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-09 01:27:03,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2025-03-09 01:27:03,849 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2025-03-09 01:27:03,851 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:27:03,853 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. [2025-03-09 01:27:03,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2025-03-09 01:27:03,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2025-03-09 01:27:03,864 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:27:03,873 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;@4e756ff6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:27:03,874 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-09 01:27:03,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:27:03,885 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-03-09 01:27:03,885 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:27:03,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:03,886 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:03,886 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)] === [2025-03-09 01:27:03,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:03,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1889287205, now seen corresponding path program 1 times [2025-03-09 01:27:03,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:03,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583082733] [2025-03-09 01:27:03,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:27:03,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:03,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 01:27:03,983 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 01:27:03,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:27:03,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:04,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:04,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583082733] [2025-03-09 01:27:04,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583082733] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:27:04,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:27:04,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:27:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589155504] [2025-03-09 01:27:04,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:27:04,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:27:04,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:04,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:27:04,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:27:04,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2025-03-09 01:27:04,226 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) [2025-03-09 01:27:04,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:04,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2025-03-09 01:27:04,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:04,300 INFO L124 PetriNetUnfolderBase]: 73/147 cut-off events. [2025-03-09 01:27:04,300 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-09 01:27:04,302 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 440 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. [2025-03-09 01:27:04,304 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2025-03-09 01:27:04,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2025-03-09 01:27:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:27:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:27:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2025-03-09 01:27:04,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2025-03-09 01:27:04,314 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 3 states and 45 transitions. [2025-03-09 01:27:04,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2025-03-09 01:27:04,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:27:04,318 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2025-03-09 01:27:04,320 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} [2025-03-09 01:27:04,322 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2025-03-09 01:27:04,323 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2025-03-09 01:27:04,323 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) [2025-03-09 01:27:04,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:04,323 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:04,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:27:04,323 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)] === [2025-03-09 01:27:04,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1807298884, now seen corresponding path program 1 times [2025-03-09 01:27:04,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:04,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664435074] [2025-03-09 01:27:04,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:27:04,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:04,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 01:27:04,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:27:04,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:27:04,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:27:04,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:04,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664435074] [2025-03-09 01:27:04,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664435074] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:27:04,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:27:04,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:27:04,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470825912] [2025-03-09 01:27:04,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:27:04,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:27:04,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:04,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:27:04,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:27:04,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:04,466 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) [2025-03-09 01:27:04,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:04,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:04,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:04,583 INFO L124 PetriNetUnfolderBase]: 173/302 cut-off events. [2025-03-09 01:27:04,584 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2025-03-09 01:27:04,585 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 980 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. [2025-03-09 01:27:04,586 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 25 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2025-03-09 01:27:04,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 29 transitions, 134 flow [2025-03-09 01:27:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:27:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:27:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2025-03-09 01:27:04,587 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4673913043478261 [2025-03-09 01:27:04,588 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 43 transitions. [2025-03-09 01:27:04,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 29 transitions, 134 flow [2025-03-09 01:27:04,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:27:04,589 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2025-03-09 01:27:04,590 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} [2025-03-09 01:27:04,590 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2025-03-09 01:27:04,591 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2025-03-09 01:27:04,591 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) [2025-03-09 01:27:04,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:04,591 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:04,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:27:04,591 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)] === [2025-03-09 01:27:04,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:04,593 INFO L85 PathProgramCache]: Analyzing trace with hash 959108986, now seen corresponding path program 1 times [2025-03-09 01:27:04,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:04,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121910179] [2025-03-09 01:27:04,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:27:04,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:04,603 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-09 01:27:04,614 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:27:04,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:27:04,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:04,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121910179] [2025-03-09 01:27:04,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121910179] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962062589] [2025-03-09 01:27:04,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:27:04,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:04,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:04,929 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) [2025-03-09 01:27:04,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:27:04,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-09 01:27:04,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:27:04,982 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:27:04,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:04,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:27:04,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:05,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962062589] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:05,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:27:05,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 12 [2025-03-09 01:27:05,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048476552] [2025-03-09 01:27:05,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:27:05,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:27:05,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:05,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:27:05,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:27:05,302 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2025-03-09 01:27:05,302 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) [2025-03-09 01:27:05,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:05,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2025-03-09 01:27:05,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:05,405 INFO L124 PetriNetUnfolderBase]: 207/386 cut-off events. [2025-03-09 01:27:05,405 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2025-03-09 01:27:05,406 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 1493 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. [2025-03-09 01:27:05,408 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 36 selfloop transitions, 6 changer transitions 3/47 dead transitions. [2025-03-09 01:27:05,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 240 flow [2025-03-09 01:27:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:27:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:27:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2025-03-09 01:27:05,409 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2025-03-09 01:27:05,409 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 62 transitions. [2025-03-09 01:27:05,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 240 flow [2025-03-09 01:27:05,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:27:05,410 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 106 flow [2025-03-09 01:27:05,410 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} [2025-03-09 01:27:05,411 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2025-03-09 01:27:05,411 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 106 flow [2025-03-09 01:27:05,411 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) [2025-03-09 01:27:05,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:05,411 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:05,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-09 01:27:05,613 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 [2025-03-09 01:27:05,613 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)] === [2025-03-09 01:27:05,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:05,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1634884316, now seen corresponding path program 2 times [2025-03-09 01:27:05,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:05,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762700569] [2025-03-09 01:27:05,615 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:27:05,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:05,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-09 01:27:05,632 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:27:05,633 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:27:05,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:05,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762700569] [2025-03-09 01:27:05,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762700569] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696362521] [2025-03-09 01:27:05,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:27:05,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:05,836 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) [2025-03-09 01:27:05,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:27:05,864 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-09 01:27:05,875 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:27:05,876 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:27:05,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:05,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:27:05,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:27:05,931 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:27:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696362521] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:27:05,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 01:27:05,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2025-03-09 01:27:05,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239770442] [2025-03-09 01:27:05,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:27:05,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:27:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:05,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:27:05,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:27:05,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:05,943 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) [2025-03-09 01:27:05,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:05,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:05,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:06,058 INFO L124 PetriNetUnfolderBase]: 263/458 cut-off events. [2025-03-09 01:27:06,059 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2025-03-09 01:27:06,060 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 1617 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. [2025-03-09 01:27:06,061 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 36 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2025-03-09 01:27:06,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 260 flow [2025-03-09 01:27:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:27:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:27:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2025-03-09 01:27:06,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2025-03-09 01:27:06,063 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 106 flow. Second operand 6 states and 64 transitions. [2025-03-09 01:27:06,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 260 flow [2025-03-09 01:27:06,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-09 01:27:06,064 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 154 flow [2025-03-09 01:27:06,064 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} [2025-03-09 01:27:06,065 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2025-03-09 01:27:06,065 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 154 flow [2025-03-09 01:27:06,065 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) [2025-03-09 01:27:06,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:06,065 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:06,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:06,265 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 [2025-03-09 01:27:06,266 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)] === [2025-03-09 01:27:06,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:06,266 INFO L85 PathProgramCache]: Analyzing trace with hash 110501288, now seen corresponding path program 3 times [2025-03-09 01:27:06,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:06,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301708918] [2025-03-09 01:27:06,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:27:06,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:06,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-09 01:27:06,282 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:27:06,282 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:27:06,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:06,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:06,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301708918] [2025-03-09 01:27:06,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301708918] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:06,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866579234] [2025-03-09 01:27:06,455 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:27:06,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:06,460 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) [2025-03-09 01:27:06,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:27:06,488 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-09 01:27:06,499 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:27:06,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:27:06,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:06,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:27:06,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:27:06,566 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:27:06,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866579234] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:27:06,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 01:27:06,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2025-03-09 01:27:06,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582340222] [2025-03-09 01:27:06,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:27:06,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-09 01:27:06,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:06,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-09 01:27:06,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:27:06,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:06,578 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) [2025-03-09 01:27:06,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:06,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:06,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:06,713 INFO L124 PetriNetUnfolderBase]: 367/634 cut-off events. [2025-03-09 01:27:06,714 INFO L125 PetriNetUnfolderBase]: For 788/788 co-relation queries the response was YES. [2025-03-09 01:27:06,715 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 35. Compared 2459 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. [2025-03-09 01:27:06,717 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 44 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2025-03-09 01:27:06,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 372 flow [2025-03-09 01:27:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 01:27:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 01:27:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2025-03-09 01:27:06,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.453416149068323 [2025-03-09 01:27:06,718 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 154 flow. Second operand 7 states and 73 transitions. [2025-03-09 01:27:06,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 372 flow [2025-03-09 01:27:06,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 361 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-09 01:27:06,722 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 212 flow [2025-03-09 01:27:06,722 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} [2025-03-09 01:27:06,722 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2025-03-09 01:27:06,722 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 212 flow [2025-03-09 01:27:06,722 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) [2025-03-09 01:27:06,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:06,722 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:06,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:06,923 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 [2025-03-09 01:27:06,923 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)] === [2025-03-09 01:27:06,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash -302721451, now seen corresponding path program 4 times [2025-03-09 01:27:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:06,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689634935] [2025-03-09 01:27:06,924 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:27:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:06,937 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:06,950 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:06,950 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:27:06,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:07,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:07,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689634935] [2025-03-09 01:27:07,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689634935] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:07,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405008436] [2025-03-09 01:27:07,088 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:27:07,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:07,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:07,091 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) [2025-03-09 01:27:07,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 01:27:07,118 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:07,128 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:07,128 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:27:07,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:07,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:27:07,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:07,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:07,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405008436] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:07,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:07,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2025-03-09 01:27:07,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977059909] [2025-03-09 01:27:07,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:07,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-09 01:27:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:07,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-09 01:27:07,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-09 01:27:07,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:07,419 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) [2025-03-09 01:27:07,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:07,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:07,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:08,239 INFO L124 PetriNetUnfolderBase]: 662/1103 cut-off events. [2025-03-09 01:27:08,239 INFO L125 PetriNetUnfolderBase]: For 1767/1767 co-relation queries the response was YES. [2025-03-09 01:27:08,242 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 4714 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. [2025-03-09 01:27:08,246 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 95 selfloop transitions, 84 changer transitions 18/198 dead transitions. [2025-03-09 01:27:08,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 198 transitions, 1397 flow [2025-03-09 01:27:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-09 01:27:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-09 01:27:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 274 transitions. [2025-03-09 01:27:08,248 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44122383252818037 [2025-03-09 01:27:08,248 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 212 flow. Second operand 27 states and 274 transitions. [2025-03-09 01:27:08,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 198 transitions, 1397 flow [2025-03-09 01:27:08,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 198 transitions, 1365 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-09 01:27:08,254 INFO L231 Difference]: Finished difference. Result has 82 places, 106 transitions, 1013 flow [2025-03-09 01:27:08,254 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} [2025-03-09 01:27:08,255 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 57 predicate places. [2025-03-09 01:27:08,255 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 106 transitions, 1013 flow [2025-03-09 01:27:08,255 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) [2025-03-09 01:27:08,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:08,255 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:08,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:08,460 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 [2025-03-09 01:27:08,460 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)] === [2025-03-09 01:27:08,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1531859913, now seen corresponding path program 5 times [2025-03-09 01:27:08,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:08,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850273301] [2025-03-09 01:27:08,461 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:27:08,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:08,465 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:08,472 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:08,476 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:27:08,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:08,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:08,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850273301] [2025-03-09 01:27:08,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850273301] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:08,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247915761] [2025-03-09 01:27:08,655 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:27:08,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:08,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:08,659 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) [2025-03-09 01:27:08,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 01:27:08,696 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:08,713 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:08,713 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:27:08,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:08,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:27:08,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:08,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:08,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247915761] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:08,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:08,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2025-03-09 01:27:08,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007141662] [2025-03-09 01:27:08,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:08,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-09 01:27:08,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:08,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-09 01:27:08,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-03-09 01:27:08,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:08,997 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) [2025-03-09 01:27:08,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:08,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:08,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:13,826 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 [] [2025-03-09 01:27:14,969 INFO L124 PetriNetUnfolderBase]: 1554/2552 cut-off events. [2025-03-09 01:27:14,969 INFO L125 PetriNetUnfolderBase]: For 23523/23523 co-relation queries the response was YES. [2025-03-09 01:27:14,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13597 conditions, 2552 events. 1554/2552 cut-off events. For 23523/23523 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12982 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. [2025-03-09 01:27:14,995 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 205 selfloop transitions, 338 changer transitions 10/554 dead transitions. [2025-03-09 01:27:14,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 554 transitions, 6190 flow [2025-03-09 01:27:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-09 01:27:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-09 01:27:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 474 transitions. [2025-03-09 01:27:14,997 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42058562555456963 [2025-03-09 01:27:14,997 INFO L175 Difference]: Start difference. First operand has 82 places, 106 transitions, 1013 flow. Second operand 49 states and 474 transitions. [2025-03-09 01:27:14,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 554 transitions, 6190 flow [2025-03-09 01:27:15,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 554 transitions, 5762 flow, removed 208 selfloop flow, removed 4 redundant places. [2025-03-09 01:27:15,077 INFO L231 Difference]: Finished difference. Result has 142 places, 429 transitions, 5241 flow [2025-03-09 01:27:15,077 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} [2025-03-09 01:27:15,078 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 117 predicate places. [2025-03-09 01:27:15,078 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 429 transitions, 5241 flow [2025-03-09 01:27:15,078 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) [2025-03-09 01:27:15,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:15,078 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:15,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:15,278 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 [2025-03-09 01:27:15,279 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)] === [2025-03-09 01:27:15,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2060337451, now seen corresponding path program 6 times [2025-03-09 01:27:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:15,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855500768] [2025-03-09 01:27:15,280 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:27:15,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:15,284 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:15,295 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:15,296 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-09 01:27:15,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:15,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:15,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855500768] [2025-03-09 01:27:15,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855500768] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:15,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112030652] [2025-03-09 01:27:15,494 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:27:15,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:15,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:15,496 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) [2025-03-09 01:27:15,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 01:27:15,522 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:15,532 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:15,532 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-09 01:27:15,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:15,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:27:15,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:15,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:15,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112030652] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:15,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:15,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-03-09 01:27:15,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619458259] [2025-03-09 01:27:15,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:15,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-09 01:27:15,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:15,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-09 01:27:15,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2025-03-09 01:27:15,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:15,756 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) [2025-03-09 01:27:15,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:15,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:15,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:16,543 INFO L124 PetriNetUnfolderBase]: 2061/3376 cut-off events. [2025-03-09 01:27:16,543 INFO L125 PetriNetUnfolderBase]: For 34744/34744 co-relation queries the response was YES. [2025-03-09 01:27:16,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21483 conditions, 3376 events. 2061/3376 cut-off events. For 34744/34744 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18550 event pairs, 73 based on Foata normal form. 10/3386 useless extension candidates. Maximal degree in co-relation 21414. Up to 875 conditions per place. [2025-03-09 01:27:16,577 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 262 selfloop transitions, 458 changer transitions 5/726 dead transitions. [2025-03-09 01:27:16,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 726 transitions, 10326 flow [2025-03-09 01:27:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-09 01:27:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-09 01:27:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 176 transitions. [2025-03-09 01:27:16,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40274599542334094 [2025-03-09 01:27:16,579 INFO L175 Difference]: Start difference. First operand has 142 places, 429 transitions, 5241 flow. Second operand 19 states and 176 transitions. [2025-03-09 01:27:16,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 726 transitions, 10326 flow [2025-03-09 01:27:16,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 726 transitions, 9090 flow, removed 604 selfloop flow, removed 4 redundant places. [2025-03-09 01:27:16,799 INFO L231 Difference]: Finished difference. Result has 164 places, 648 transitions, 8997 flow [2025-03-09 01:27:16,800 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} [2025-03-09 01:27:16,800 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 139 predicate places. [2025-03-09 01:27:16,800 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 648 transitions, 8997 flow [2025-03-09 01:27:16,801 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) [2025-03-09 01:27:16,801 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:16,801 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:16,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:17,001 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 [2025-03-09 01:27:17,001 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)] === [2025-03-09 01:27:17,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:17,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1103795631, now seen corresponding path program 7 times [2025-03-09 01:27:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:17,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667566639] [2025-03-09 01:27:17,002 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 01:27:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:17,005 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-09 01:27:17,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:17,026 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:27:17,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:17,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:17,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667566639] [2025-03-09 01:27:17,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667566639] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:17,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001825620] [2025-03-09 01:27:17,176 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 01:27:17,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:17,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:17,178 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) [2025-03-09 01:27:17,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 01:27:17,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-09 01:27:17,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:17,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:27:17,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:17,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:27:17,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:17,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:17,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001825620] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:17,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:17,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2025-03-09 01:27:17,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991936687] [2025-03-09 01:27:17,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:17,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:27:17,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:17,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:27:17,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:27:17,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:17,454 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) [2025-03-09 01:27:17,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:17,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:17,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:18,943 INFO L124 PetriNetUnfolderBase]: 2717/4466 cut-off events. [2025-03-09 01:27:18,943 INFO L125 PetriNetUnfolderBase]: For 38598/38598 co-relation queries the response was YES. [2025-03-09 01:27:18,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29943 conditions, 4466 events. 2717/4466 cut-off events. For 38598/38598 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25531 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. [2025-03-09 01:27:18,981 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 354 selfloop transitions, 769 changer transitions 8/1132 dead transitions. [2025-03-09 01:27:18,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1132 transitions, 17582 flow [2025-03-09 01:27:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-09 01:27:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-03-09 01:27:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 368 transitions. [2025-03-09 01:27:18,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2025-03-09 01:27:18,985 INFO L175 Difference]: Start difference. First operand has 164 places, 648 transitions, 8997 flow. Second operand 37 states and 368 transitions. [2025-03-09 01:27:18,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1132 transitions, 17582 flow [2025-03-09 01:27:19,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 1132 transitions, 17085 flow, removed 248 selfloop flow, removed 1 redundant places. [2025-03-09 01:27:19,361 INFO L231 Difference]: Finished difference. Result has 225 places, 990 transitions, 16740 flow [2025-03-09 01:27:19,361 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} [2025-03-09 01:27:19,362 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 200 predicate places. [2025-03-09 01:27:19,362 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 990 transitions, 16740 flow [2025-03-09 01:27:19,362 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) [2025-03-09 01:27:19,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:19,362 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:19,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:19,563 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 [2025-03-09 01:27:19,564 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)] === [2025-03-09 01:27:19,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:19,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1676447039, now seen corresponding path program 8 times [2025-03-09 01:27:19,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:19,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414586250] [2025-03-09 01:27:19,564 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:27:19,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:19,568 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:19,574 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:19,574 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:27:19,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:19,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414586250] [2025-03-09 01:27:19,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414586250] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328846263] [2025-03-09 01:27:19,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:27:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:19,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:19,715 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) [2025-03-09 01:27:19,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 01:27:19,741 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:19,751 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:19,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:27:19,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:19,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:27:19,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:19,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:19,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328846263] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:19,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:19,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-09 01:27:19,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369452090] [2025-03-09 01:27:19,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:19,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-09 01:27:19,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:19,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-09 01:27:19,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2025-03-09 01:27:19,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:19,971 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) [2025-03-09 01:27:19,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:19,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:19,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:22,012 INFO L124 PetriNetUnfolderBase]: 3710/6166 cut-off events. [2025-03-09 01:27:22,013 INFO L125 PetriNetUnfolderBase]: For 69999/69999 co-relation queries the response was YES. [2025-03-09 01:27:22,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48090 conditions, 6166 events. 3710/6166 cut-off events. For 69999/69999 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38333 event pairs, 59 based on Foata normal form. 64/6230 useless extension candidates. Maximal degree in co-relation 47196. Up to 1354 conditions per place. [2025-03-09 01:27:22,069 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 468 selfloop transitions, 1150 changer transitions 10/1629 dead transitions. [2025-03-09 01:27:22,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1629 transitions, 29961 flow [2025-03-09 01:27:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-09 01:27:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-03-09 01:27:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 326 transitions. [2025-03-09 01:27:22,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4429347826086957 [2025-03-09 01:27:22,072 INFO L175 Difference]: Start difference. First operand has 225 places, 990 transitions, 16740 flow. Second operand 32 states and 326 transitions. [2025-03-09 01:27:22,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1629 transitions, 29961 flow [2025-03-09 01:27:23,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1629 transitions, 29207 flow, removed 368 selfloop flow, removed 2 redundant places. [2025-03-09 01:27:23,242 INFO L231 Difference]: Finished difference. Result has 273 places, 1434 transitions, 28473 flow [2025-03-09 01:27:23,243 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} [2025-03-09 01:27:23,244 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2025-03-09 01:27:23,244 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 1434 transitions, 28473 flow [2025-03-09 01:27:23,244 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) [2025-03-09 01:27:23,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:23,244 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:23,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:23,445 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 [2025-03-09 01:27:23,445 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)] === [2025-03-09 01:27:23,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:23,446 INFO L85 PathProgramCache]: Analyzing trace with hash 199683563, now seen corresponding path program 9 times [2025-03-09 01:27:23,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:23,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188273909] [2025-03-09 01:27:23,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:27:23,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:23,449 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:23,458 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:23,458 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:27:23,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:23,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:23,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188273909] [2025-03-09 01:27:23,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188273909] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:23,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570612181] [2025-03-09 01:27:23,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:27:23,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:23,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:23,590 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) [2025-03-09 01:27:23,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 01:27:23,621 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:23,633 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:23,634 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:27:23,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:23,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:27:23,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:23,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:23,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570612181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:23,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:23,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2025-03-09 01:27:23,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244342477] [2025-03-09 01:27:23,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:23,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-09 01:27:23,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:23,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-09 01:27:23,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2025-03-09 01:27:23,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:23,916 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) [2025-03-09 01:27:23,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:23,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:23,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:26,027 INFO L124 PetriNetUnfolderBase]: 3755/6204 cut-off events. [2025-03-09 01:27:26,027 INFO L125 PetriNetUnfolderBase]: For 94140/94140 co-relation queries the response was YES. [2025-03-09 01:27:26,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54888 conditions, 6204 events. 3755/6204 cut-off events. For 94140/94140 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38516 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. [2025-03-09 01:27:26,091 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 503 selfloop transitions, 1081 changer transitions 4/1589 dead transitions. [2025-03-09 01:27:26,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1589 transitions, 33705 flow [2025-03-09 01:27:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-09 01:27:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-09 01:27:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 220 transitions. [2025-03-09 01:27:26,092 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4554865424430642 [2025-03-09 01:27:26,093 INFO L175 Difference]: Start difference. First operand has 273 places, 1434 transitions, 28473 flow. Second operand 21 states and 220 transitions. [2025-03-09 01:27:26,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1589 transitions, 33705 flow [2025-03-09 01:27:27,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1589 transitions, 33396 flow, removed 149 selfloop flow, removed 1 redundant places. [2025-03-09 01:27:27,830 INFO L231 Difference]: Finished difference. Result has 294 places, 1460 transitions, 31667 flow [2025-03-09 01:27:27,831 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} [2025-03-09 01:27:27,831 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 269 predicate places. [2025-03-09 01:27:27,831 INFO L471 AbstractCegarLoop]: Abstraction has has 294 places, 1460 transitions, 31667 flow [2025-03-09 01:27:27,832 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) [2025-03-09 01:27:27,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:27,832 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:27,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-09 01:27:28,036 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 [2025-03-09 01:27:28,036 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)] === [2025-03-09 01:27:28,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:28,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1366224341, now seen corresponding path program 10 times [2025-03-09 01:27:28,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:28,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284204209] [2025-03-09 01:27:28,037 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:27:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:28,040 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:28,043 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:28,043 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:27:28,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284204209] [2025-03-09 01:27:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284204209] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856028495] [2025-03-09 01:27:28,170 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:27:28,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:28,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:28,172 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) [2025-03-09 01:27:28,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 01:27:28,197 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:28,206 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:28,207 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:27:28,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:28,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:27:28,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:28,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:28,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856028495] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:28,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:28,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-09 01:27:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051572332] [2025-03-09 01:27:28,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:28,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:27:28,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:28,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:27:28,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:27:28,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:28,544 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) [2025-03-09 01:27:28,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:28,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:28,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:31,307 INFO L124 PetriNetUnfolderBase]: 4275/7094 cut-off events. [2025-03-09 01:27:31,307 INFO L125 PetriNetUnfolderBase]: For 139106/139106 co-relation queries the response was YES. [2025-03-09 01:27:31,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67696 conditions, 7094 events. 4275/7094 cut-off events. For 139106/139106 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 45262 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. [2025-03-09 01:27:31,390 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 514 selfloop transitions, 1273 changer transitions 8/1796 dead transitions. [2025-03-09 01:27:31,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1796 transitions, 41785 flow [2025-03-09 01:27:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-09 01:27:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-09 01:27:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 244 transitions. [2025-03-09 01:27:31,391 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4612476370510397 [2025-03-09 01:27:31,392 INFO L175 Difference]: Start difference. First operand has 294 places, 1460 transitions, 31667 flow. Second operand 23 states and 244 transitions. [2025-03-09 01:27:31,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1796 transitions, 41785 flow [2025-03-09 01:27:33,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1796 transitions, 40806 flow, removed 29 selfloop flow, removed 9 redundant places. [2025-03-09 01:27:33,812 INFO L231 Difference]: Finished difference. Result has 315 places, 1666 transitions, 40760 flow [2025-03-09 01:27:33,813 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} [2025-03-09 01:27:33,814 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 290 predicate places. [2025-03-09 01:27:33,814 INFO L471 AbstractCegarLoop]: Abstraction has has 315 places, 1666 transitions, 40760 flow [2025-03-09 01:27:33,814 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) [2025-03-09 01:27:33,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:33,814 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:33,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-09 01:27:34,014 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 [2025-03-09 01:27:34,014 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)] === [2025-03-09 01:27:34,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:34,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1522481873, now seen corresponding path program 11 times [2025-03-09 01:27:34,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:34,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170157187] [2025-03-09 01:27:34,015 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:27:34,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:34,018 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:34,023 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:34,023 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:27:34,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:34,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:34,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170157187] [2025-03-09 01:27:34,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170157187] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:34,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808730262] [2025-03-09 01:27:34,138 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:27:34,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:34,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:34,140 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) [2025-03-09 01:27:34,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 01:27:34,164 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:34,173 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:34,173 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:27:34,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:34,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:27:34,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:34,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:34,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808730262] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:34,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:34,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2025-03-09 01:27:34,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136422732] [2025-03-09 01:27:34,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:34,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-09 01:27:34,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:34,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-09 01:27:34,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2025-03-09 01:27:34,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:34,357 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) [2025-03-09 01:27:34,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:34,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:34,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:37,428 INFO L124 PetriNetUnfolderBase]: 4481/7389 cut-off events. [2025-03-09 01:27:37,428 INFO L125 PetriNetUnfolderBase]: For 179687/179687 co-relation queries the response was YES. [2025-03-09 01:27:37,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77918 conditions, 7389 events. 4481/7389 cut-off events. For 179687/179687 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 46928 event pairs, 257 based on Foata normal form. 14/7403 useless extension candidates. Maximal degree in co-relation 76284. Up to 1896 conditions per place. [2025-03-09 01:27:37,516 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 386 selfloop transitions, 1486 changer transitions 2/1875 dead transitions. [2025-03-09 01:27:37,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1875 transitions, 48587 flow [2025-03-09 01:27:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-09 01:27:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-09 01:27:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 211 transitions. [2025-03-09 01:27:37,519 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43685300207039335 [2025-03-09 01:27:37,519 INFO L175 Difference]: Start difference. First operand has 315 places, 1666 transitions, 40760 flow. Second operand 21 states and 211 transitions. [2025-03-09 01:27:37,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1875 transitions, 48587 flow [2025-03-09 01:27:40,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1875 transitions, 48241 flow, removed 93 selfloop flow, removed 10 redundant places. [2025-03-09 01:27:40,693 INFO L231 Difference]: Finished difference. Result has 333 places, 1785 transitions, 49193 flow [2025-03-09 01:27:40,694 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} [2025-03-09 01:27:40,695 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 308 predicate places. [2025-03-09 01:27:40,695 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 1785 transitions, 49193 flow [2025-03-09 01:27:40,696 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) [2025-03-09 01:27:40,696 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:40,696 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:40,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-09 01:27:40,898 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 [2025-03-09 01:27:40,899 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)] === [2025-03-09 01:27:40,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash -930439517, now seen corresponding path program 12 times [2025-03-09 01:27:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:40,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543979695] [2025-03-09 01:27:40,900 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:27:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:40,902 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:40,915 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:40,916 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-09 01:27:40,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:41,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:41,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543979695] [2025-03-09 01:27:41,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543979695] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:41,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127498155] [2025-03-09 01:27:41,007 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:27:41,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:41,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:41,008 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) [2025-03-09 01:27:41,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 01:27:41,035 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:27:41,046 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:41,046 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-09 01:27:41,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:41,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:27:41,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:41,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:41,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127498155] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:41,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:41,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2025-03-09 01:27:41,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794268580] [2025-03-09 01:27:41,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:41,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-09 01:27:41,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:41,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-09 01:27:41,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2025-03-09 01:27:41,251 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:27:41,251 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) [2025-03-09 01:27:41,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:41,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:27:41,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:47,744 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 [] [2025-03-09 01:27:50,990 INFO L124 PetriNetUnfolderBase]: 6602/10912 cut-off events. [2025-03-09 01:27:50,990 INFO L125 PetriNetUnfolderBase]: For 318760/318760 co-relation queries the response was YES. [2025-03-09 01:27:51,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126556 conditions, 10912 events. 6602/10912 cut-off events. For 318760/318760 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 73114 event pairs, 80 based on Foata normal form. 56/10968 useless extension candidates. Maximal degree in co-relation 124144. Up to 3935 conditions per place. [2025-03-09 01:27:51,131 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1175 selfloop transitions, 1815 changer transitions 15/3006 dead transitions. [2025-03-09 01:27:51,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 3006 transitions, 87170 flow [2025-03-09 01:27:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-09 01:27:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-09 01:27:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 481 transitions. [2025-03-09 01:27:51,132 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42679680567879325 [2025-03-09 01:27:51,132 INFO L175 Difference]: Start difference. First operand has 333 places, 1785 transitions, 49193 flow. Second operand 49 states and 481 transitions. [2025-03-09 01:27:51,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 3006 transitions, 87170 flow [2025-03-09 01:27:59,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 3006 transitions, 86604 flow, removed 214 selfloop flow, removed 7 redundant places. [2025-03-09 01:27:59,716 INFO L231 Difference]: Finished difference. Result has 408 places, 2751 transitions, 82939 flow [2025-03-09 01:27:59,718 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} [2025-03-09 01:27:59,718 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 383 predicate places. [2025-03-09 01:27:59,718 INFO L471 AbstractCegarLoop]: Abstraction has has 408 places, 2751 transitions, 82939 flow [2025-03-09 01:27:59,719 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) [2025-03-09 01:27:59,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:59,719 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:59,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:59,923 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 [2025-03-09 01:27:59,923 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)] === [2025-03-09 01:27:59,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:59,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1564770049, now seen corresponding path program 13 times [2025-03-09 01:27:59,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:59,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018134947] [2025-03-09 01:27:59,924 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 01:27:59,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:59,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-09 01:27:59,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:27:59,930 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:27:59,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:28:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:28:00,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:28:00,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018134947] [2025-03-09 01:28:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018134947] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:28:00,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:28:00,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-09 01:28:00,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559268396] [2025-03-09 01:28:00,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:28:00,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-09 01:28:00,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:28:00,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-09 01:28:00,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-09 01:28:00,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:28:00,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 2751 transitions, 82939 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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) [2025-03-09 01:28:00,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:28:00,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:28:00,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:28:06,568 INFO L124 PetriNetUnfolderBase]: 6614/10944 cut-off events. [2025-03-09 01:28:06,568 INFO L125 PetriNetUnfolderBase]: For 377060/377060 co-relation queries the response was YES. [2025-03-09 01:28:06,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138857 conditions, 10944 events. 6614/10944 cut-off events. For 377060/377060 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 73390 event pairs, 1798 based on Foata normal form. 2/10946 useless extension candidates. Maximal degree in co-relation 138634. Up to 9648 conditions per place. [2025-03-09 01:28:06,726 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 2610 selfloop transitions, 217 changer transitions 4/2832 dead transitions. [2025-03-09 01:28:06,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 2832 transitions, 90463 flow [2025-03-09 01:28:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:28:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-09 01:28:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2025-03-09 01:28:06,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4076086956521739 [2025-03-09 01:28:06,727 INFO L175 Difference]: Start difference. First operand has 408 places, 2751 transitions, 82939 flow. Second operand 8 states and 75 transitions. [2025-03-09 01:28:06,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 2832 transitions, 90463 flow [2025-03-09 01:28:17,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 2832 transitions, 88880 flow, removed 725 selfloop flow, removed 6 redundant places. [2025-03-09 01:28:17,131 INFO L231 Difference]: Finished difference. Result has 412 places, 2763 transitions, 82190 flow [2025-03-09 01:28:17,133 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=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=82190, PETRI_PLACES=412, PETRI_TRANSITIONS=2763} [2025-03-09 01:28:17,133 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 387 predicate places. [2025-03-09 01:28:17,134 INFO L471 AbstractCegarLoop]: Abstraction has has 412 places, 2763 transitions, 82190 flow [2025-03-09 01:28:17,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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) [2025-03-09 01:28:17,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:28:17,134 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:28:17,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-09 01:28:17,134 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)] === [2025-03-09 01:28:17,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:28:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1026914471, now seen corresponding path program 14 times [2025-03-09 01:28:17,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:28:17,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422961794] [2025-03-09 01:28:17,135 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:28:17,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:28:17,138 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:28:17,142 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:28:17,142 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:28:17,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:28:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:28:17,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:28:17,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422961794] [2025-03-09 01:28:17,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422961794] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:28:17,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118959606] [2025-03-09 01:28:17,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:28:17,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:28:17,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:28:17,241 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) [2025-03-09 01:28:17,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 01:28:17,265 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:28:17,275 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:28:17,275 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:28:17,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:28:17,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:28:17,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:28:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:28:17,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:28:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:28:17,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118959606] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:28:17,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:28:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2025-03-09 01:28:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818125257] [2025-03-09 01:28:17,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:28:17,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:28:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:28:17,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:28:17,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:28:17,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2025-03-09 01:28:17,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 2763 transitions, 82190 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) [2025-03-09 01:28:17,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:28:17,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2025-03-09 01:28:17,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:28:25,487 INFO L124 PetriNetUnfolderBase]: 7628/12605 cut-off events. [2025-03-09 01:28:25,487 INFO L125 PetriNetUnfolderBase]: For 453775/453775 co-relation queries the response was YES. [2025-03-09 01:28:25,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160439 conditions, 12605 events. 7628/12605 cut-off events. For 453775/453775 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 86679 event pairs, 856 based on Foata normal form. 61/12666 useless extension candidates. Maximal degree in co-relation 158163. Up to 5564 conditions per place. [2025-03-09 01:28:25,669 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 1092 selfloop transitions, 2230 changer transitions 7/3330 dead transitions. [2025-03-09 01:28:25,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 3330 transitions, 104835 flow [2025-03-09 01:28:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-09 01:28:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-09 01:28:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 232 transitions. [2025-03-09 01:28:25,670 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43856332703213613 [2025-03-09 01:28:25,670 INFO L175 Difference]: Start difference. First operand has 412 places, 2763 transitions, 82190 flow. Second operand 23 states and 232 transitions. [2025-03-09 01:28:25,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 3330 transitions, 104835 flow [2025-03-09 01:28:38,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 3330 transitions, 104616 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-03-09 01:28:38,724 INFO L231 Difference]: Finished difference. Result has 442 places, 3155 transitions, 103984 flow [2025-03-09 01:28:38,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=81978, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1878, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=103984, PETRI_PLACES=442, PETRI_TRANSITIONS=3155} [2025-03-09 01:28:38,727 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 417 predicate places. [2025-03-09 01:28:38,727 INFO L471 AbstractCegarLoop]: Abstraction has has 442 places, 3155 transitions, 103984 flow [2025-03-09 01:28:38,728 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) [2025-03-09 01:28:38,728 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:28:38,728 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:28:38,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-09 01:28:38,928 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,SelfDestructingSolverStorable15 [2025-03-09 01:28:38,928 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)] === [2025-03-09 01:28:38,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:28:38,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1426550271, now seen corresponding path program 15 times [2025-03-09 01:28:38,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:28:38,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808668224] [2025-03-09 01:28:38,929 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:28:38,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:28:38,932 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-03-09 01:28:38,943 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-03-09 01:28:38,946 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-09 01:28:38,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:28:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:28:39,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:28:39,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808668224] [2025-03-09 01:28:39,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808668224] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:28:39,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545667446] [2025-03-09 01:28:39,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:28:39,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:28:39,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:28:39,082 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) [2025-03-09 01:28:39,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-09 01:28:39,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-03-09 01:28:39,127 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-03-09 01:28:39,127 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-09 01:28:39,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:28:39,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:28:39,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:28:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:28:39,292 INFO L312 TraceCheckSpWp]: Computing backward predicates...