./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-symm.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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:23:27,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:23:27,347 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:23:27,354 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:23:27,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:23:27,378 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:23:27,379 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:23:27,379 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:23:27,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:23:27,379 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:23:27,380 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:23:27,380 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:23:27,380 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:23:27,380 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:23:27,381 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:23:27,381 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:23:27,382 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:23:27,383 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:23:27,383 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:23:27,383 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:23:27,383 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:23:27,383 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:23:27,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:23:27,383 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:23:27,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:23:27,384 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:23:27,384 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:23:27,384 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:23:27,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:23:27,384 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:23:27,384 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:23:27,384 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:23:27,384 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:23:27,384 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 -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2025-03-17 14:23:27,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:23:27,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:23:27,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:23:27,598 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:23:27,598 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:23:27,599 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2025-03-17 14:23:28,716 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7420e0e04/5a40c7ad7459477b8e667ef9fb1caea6/FLAG085bfaa6b [2025-03-17 14:23:28,928 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:23:28,932 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2025-03-17 14:23:28,940 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7420e0e04/5a40c7ad7459477b8e667ef9fb1caea6/FLAG085bfaa6b [2025-03-17 14:23:29,274 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7420e0e04/5a40c7ad7459477b8e667ef9fb1caea6 [2025-03-17 14:23:29,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:23:29,277 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:23:29,278 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:23:29,278 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:23:29,281 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:23:29,281 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18185998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29, skipping insertion in model container [2025-03-17 14:23:29,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,294 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:23:29,428 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:23:29,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:23:29,439 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:23:29,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:23:29,480 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:23:29,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29 WrapperNode [2025-03-17 14:23:29,481 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:23:29,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:23:29,482 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:23:29,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:23:29,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,494 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,517 INFO L138 Inliner]: procedures = 24, calls = 25, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 216 [2025-03-17 14:23:29,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:23:29,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:23:29,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:23:29,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:23:29,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,529 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,551 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 14:23:29,551 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,551 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,555 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,559 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,560 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,563 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:23:29,565 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:23:29,565 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:23:29,565 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:23:29,566 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (1/1) ... [2025-03-17 14:23:29,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:23:29,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:29,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 14:23:29,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 14:23:29,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:23:29,604 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:23:29,604 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:23:29,604 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:23:29,604 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:23:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:23:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:23:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:23:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:23:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:23:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:23:29,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:23:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:23:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:23:29,606 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:23:29,681 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:23:29,682 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:23:29,961 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:23:29,962 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:23:30,182 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:23:30,182 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:23:30,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:23:30 BoogieIcfgContainer [2025-03-17 14:23:30,183 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:23:30,184 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:23:30,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:23:30,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:23:30,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:23:29" (1/3) ... [2025-03-17 14:23:30,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8b85f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:23:30, skipping insertion in model container [2025-03-17 14:23:30,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:29" (2/3) ... [2025-03-17 14:23:30,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8b85f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:23:30, skipping insertion in model container [2025-03-17 14:23:30,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:23:30" (3/3) ... [2025-03-17 14:23:30,190 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2025-03-17 14:23:30,200 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:23:30,201 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-symm.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-03-17 14:23:30,201 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:23:30,238 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:23:30,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 88 flow [2025-03-17 14:23:30,288 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2025-03-17 14:23:30,290 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:23:30,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 5/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 49 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2025-03-17 14:23:30,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 88 flow [2025-03-17 14:23:30,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 34 transitions, 80 flow [2025-03-17 14:23:30,302 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:23:30,311 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;@41d2710b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:23:30,311 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-03-17 14:23:30,314 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:23:30,316 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2025-03-17 14:23:30,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:23:30,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:30,316 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:23:30,317 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:30,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash 587038, now seen corresponding path program 1 times [2025-03-17 14:23:30,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:30,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963213331] [2025-03-17 14:23:30,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:30,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:30,378 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:23:30,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:23:30,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:30,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:30,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:30,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963213331] [2025-03-17 14:23:30,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963213331] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:30,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:30,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:23:30,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797362476] [2025-03-17 14:23:30,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:30,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:23:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:30,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:23:30,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:23:30,566 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-17 14:23:30,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:30,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:30,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-17 14:23:30,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:30,666 INFO L124 PetriNetUnfolderBase]: 128/255 cut-off events. [2025-03-17 14:23:30,667 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-03-17 14:23:30,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 255 events. 128/255 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 917 event pairs, 100 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 450. Up to 221 conditions per place. [2025-03-17 14:23:30,671 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-03-17 14:23:30,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 116 flow [2025-03-17 14:23:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2025-03-17 14:23:30,685 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2025-03-17 14:23:30,688 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 80 flow. Second operand 3 states and 54 transitions. [2025-03-17 14:23:30,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 116 flow [2025-03-17 14:23:30,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:23:30,694 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2025-03-17 14:23:30,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-03-17 14:23:30,698 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-03-17 14:23:30,698 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2025-03-17 14:23:30,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:30,698 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:30,698 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:23:30,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:23:30,699 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:30,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash 587039, now seen corresponding path program 1 times [2025-03-17 14:23:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:30,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393319804] [2025-03-17 14:23:30,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:30,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:30,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:23:30,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:23:30,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:30,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:30,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:30,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393319804] [2025-03-17 14:23:30,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393319804] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:30,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:30,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:23:30,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10728029] [2025-03-17 14:23:30,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:30,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:30,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:30,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:30,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:30,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-17 14:23:30,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:30,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:30,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-17 14:23:30,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:31,003 INFO L124 PetriNetUnfolderBase]: 129/258 cut-off events. [2025-03-17 14:23:31,003 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:23:31,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 258 events. 129/258 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 923 event pairs, 100 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 476. Up to 226 conditions per place. [2025-03-17 14:23:31,005 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2025-03-17 14:23:31,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 128 flow [2025-03-17 14:23:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2025-03-17 14:23:31,006 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2025-03-17 14:23:31,006 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 3 states and 55 transitions. [2025-03-17 14:23:31,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 128 flow [2025-03-17 14:23:31,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:31,007 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 81 flow [2025-03-17 14:23:31,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2025-03-17 14:23:31,008 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2025-03-17 14:23:31,008 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 81 flow [2025-03-17 14:23:31,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:31,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:31,008 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:23:31,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:23:31,009 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:31,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:31,009 INFO L85 PathProgramCache]: Analyzing trace with hash 564163567, now seen corresponding path program 1 times [2025-03-17 14:23:31,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:31,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251068612] [2025-03-17 14:23:31,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:31,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:31,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:23:31,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:23:31,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:31,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:31,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:31,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251068612] [2025-03-17 14:23:31,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251068612] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:31,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952624163] [2025-03-17 14:23:31,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:31,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:31,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:31,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:31,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:23:31,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:23:31,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:23:31,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:31,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:31,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:23:31,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:31,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:31,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:31,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952624163] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:31,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:31,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-03-17 14:23:31,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414438109] [2025-03-17 14:23:31,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:31,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:23:31,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:31,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:23:31,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:23:31,483 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-17 14:23:31,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 81 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:31,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:31,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-17 14:23:31,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:31,625 INFO L124 PetriNetUnfolderBase]: 131/264 cut-off events. [2025-03-17 14:23:31,625 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:23:31,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 264 events. 131/264 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 965 event pairs, 100 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 476. Up to 228 conditions per place. [2025-03-17 14:23:31,626 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 26 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2025-03-17 14:23:31,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 169 flow [2025-03-17 14:23:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2025-03-17 14:23:31,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2025-03-17 14:23:31,629 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 81 flow. Second operand 5 states and 80 transitions. [2025-03-17 14:23:31,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 169 flow [2025-03-17 14:23:31,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:23:31,630 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 122 flow [2025-03-17 14:23:31,630 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2025-03-17 14:23:31,631 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2025-03-17 14:23:31,631 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 122 flow [2025-03-17 14:23:31,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:31,631 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:31,631 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:31,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:23:31,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:31,832 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:31,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1009536595, now seen corresponding path program 1 times [2025-03-17 14:23:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:31,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134466417] [2025-03-17 14:23:31,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:31,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:31,841 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:23:31,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:23:31,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:31,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:31,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:31,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134466417] [2025-03-17 14:23:31,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134466417] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:31,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:31,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:23:31,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759096479] [2025-03-17 14:23:31,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:31,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:23:31,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:31,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:23:31,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:23:31,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:31,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:31,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:31,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:31,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:31,950 INFO L124 PetriNetUnfolderBase]: 130/263 cut-off events. [2025-03-17 14:23:31,950 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-17 14:23:31,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 263 events. 130/263 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 932 event pairs, 100 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 493. Up to 230 conditions per place. [2025-03-17 14:23:31,951 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2025-03-17 14:23:31,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 176 flow [2025-03-17 14:23:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-03-17 14:23:31,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2025-03-17 14:23:31,954 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 122 flow. Second operand 3 states and 56 transitions. [2025-03-17 14:23:31,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 176 flow [2025-03-17 14:23:31,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 166 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-17 14:23:31,956 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 110 flow [2025-03-17 14:23:31,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-03-17 14:23:31,956 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2025-03-17 14:23:31,956 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 110 flow [2025-03-17 14:23:31,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:31,956 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:31,956 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:31,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:23:31,956 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:31,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1253579485, now seen corresponding path program 1 times [2025-03-17 14:23:31,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:31,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677328941] [2025-03-17 14:23:31,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:31,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:31,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:23:31,969 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:23:31,969 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:31,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:32,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:32,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677328941] [2025-03-17 14:23:32,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677328941] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:32,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202788762] [2025-03-17 14:23:32,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:32,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:32,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:32,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:32,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:23:32,066 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:23:32,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:23:32,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:32,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:32,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 14:23:32,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:32,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:32,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202788762] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:32,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:32,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-03-17 14:23:32,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840531770] [2025-03-17 14:23:32,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:32,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:23:32,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:32,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:23:32,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:23:32,130 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:32,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:32,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:32,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:32,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:32,203 INFO L124 PetriNetUnfolderBase]: 128/261 cut-off events. [2025-03-17 14:23:32,204 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-03-17 14:23:32,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 261 events. 128/261 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 901 event pairs, 100 based on Foata normal form. 2/221 useless extension candidates. Maximal degree in co-relation 502. Up to 223 conditions per place. [2025-03-17 14:23:32,205 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 23 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2025-03-17 14:23:32,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 164 flow [2025-03-17 14:23:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2025-03-17 14:23:32,206 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2025-03-17 14:23:32,207 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 110 flow. Second operand 5 states and 80 transitions. [2025-03-17 14:23:32,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 164 flow [2025-03-17 14:23:32,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:32,208 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 116 flow [2025-03-17 14:23:32,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2025-03-17 14:23:32,209 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2025-03-17 14:23:32,209 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 116 flow [2025-03-17 14:23:32,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:32,209 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:32,209 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2025-03-17 14:23:32,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:32,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:32,410 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:32,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:32,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1267788401, now seen corresponding path program 2 times [2025-03-17 14:23:32,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:32,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381427620] [2025-03-17 14:23:32,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:32,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:32,416 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-03-17 14:23:32,423 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:23:32,424 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:32,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:32,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:32,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381427620] [2025-03-17 14:23:32,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381427620] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:32,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128653824] [2025-03-17 14:23:32,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:32,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:32,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:32,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:32,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:23:32,521 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-03-17 14:23:32,533 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:23:32,533 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:32,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:32,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:23:32,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:32,583 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:23:32,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128653824] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:32,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:23:32,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-17 14:23:32,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835023896] [2025-03-17 14:23:32,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:32,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:23:32,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:32,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:23:32,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:23:32,589 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:32,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:32,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:32,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:32,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:32,666 INFO L124 PetriNetUnfolderBase]: 127/258 cut-off events. [2025-03-17 14:23:32,667 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-17 14:23:32,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 258 events. 127/258 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 897 event pairs, 100 based on Foata normal form. 1/217 useless extension candidates. Maximal degree in co-relation 488. Up to 221 conditions per place. [2025-03-17 14:23:32,668 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2025-03-17 14:23:32,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 32 transitions, 156 flow [2025-03-17 14:23:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:23:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:23:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2025-03-17 14:23:32,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3963963963963964 [2025-03-17 14:23:32,669 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 116 flow. Second operand 6 states and 88 transitions. [2025-03-17 14:23:32,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 32 transitions, 156 flow [2025-03-17 14:23:32,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 140 flow, removed 1 selfloop flow, removed 7 redundant places. [2025-03-17 14:23:32,670 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 88 flow [2025-03-17 14:23:32,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=88, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2025-03-17 14:23:32,671 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2025-03-17 14:23:32,671 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 88 flow [2025-03-17 14:23:32,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:32,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:32,671 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:32,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 14:23:32,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:32,872 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:32,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:32,872 INFO L85 PathProgramCache]: Analyzing trace with hash 380417731, now seen corresponding path program 2 times [2025-03-17 14:23:32,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:32,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897805888] [2025-03-17 14:23:32,873 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:32,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:32,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-17 14:23:32,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 13 statements. [2025-03-17 14:23:32,882 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:23:32,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:32,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:32,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897805888] [2025-03-17 14:23:32,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897805888] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:32,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:32,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:32,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149986370] [2025-03-17 14:23:32,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:32,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:32,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:32,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:33,010 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-17 14:23:33,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:33,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:33,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-17 14:23:33,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:33,108 INFO L124 PetriNetUnfolderBase]: 253/485 cut-off events. [2025-03-17 14:23:33,108 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:23:33,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 485 events. 253/485 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2097 event pairs, 118 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 927. Up to 254 conditions per place. [2025-03-17 14:23:33,114 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 39 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2025-03-17 14:23:33,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 211 flow [2025-03-17 14:23:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2025-03-17 14:23:33,115 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4702702702702703 [2025-03-17 14:23:33,116 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 88 flow. Second operand 5 states and 87 transitions. [2025-03-17 14:23:33,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 211 flow [2025-03-17 14:23:33,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 199 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-17 14:23:33,118 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 92 flow [2025-03-17 14:23:33,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2025-03-17 14:23:33,118 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2025-03-17 14:23:33,118 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 92 flow [2025-03-17 14:23:33,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:33,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:33,118 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:33,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:23:33,118 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:33,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:33,119 INFO L85 PathProgramCache]: Analyzing trace with hash 380417730, now seen corresponding path program 1 times [2025-03-17 14:23:33,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:33,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641316923] [2025-03-17 14:23:33,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:33,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:33,133 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:23:33,138 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:23:33,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:33,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:33,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:33,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641316923] [2025-03-17 14:23:33,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641316923] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:33,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:33,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:33,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751439277] [2025-03-17 14:23:33,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:33,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:33,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:33,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:33,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:33,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-17 14:23:33,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:33,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:33,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-17 14:23:33,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:33,246 INFO L124 PetriNetUnfolderBase]: 233/441 cut-off events. [2025-03-17 14:23:33,246 INFO L125 PetriNetUnfolderBase]: For 67/73 co-relation queries the response was YES. [2025-03-17 14:23:33,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 441 events. 233/441 cut-off events. For 67/73 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1699 event pairs, 195 based on Foata normal form. 28/417 useless extension candidates. Maximal degree in co-relation 356. Up to 404 conditions per place. [2025-03-17 14:23:33,248 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 24 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-03-17 14:23:33,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 140 flow [2025-03-17 14:23:33,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2025-03-17 14:23:33,249 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3581081081081081 [2025-03-17 14:23:33,249 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 92 flow. Second operand 4 states and 53 transitions. [2025-03-17 14:23:33,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 140 flow [2025-03-17 14:23:33,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:33,249 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 86 flow [2025-03-17 14:23:33,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2025-03-17 14:23:33,250 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2025-03-17 14:23:33,250 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 86 flow [2025-03-17 14:23:33,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:33,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:33,250 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:33,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:23:33,250 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:33,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:33,250 INFO L85 PathProgramCache]: Analyzing trace with hash 97470919, now seen corresponding path program 1 times [2025-03-17 14:23:33,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:33,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493346421] [2025-03-17 14:23:33,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:33,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:33,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:23:33,260 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:23:33,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:33,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:33,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:33,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493346421] [2025-03-17 14:23:33,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493346421] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:33,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952568272] [2025-03-17 14:23:33,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:33,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:33,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:33,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:33,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:23:33,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:23:33,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:23:33,444 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:33,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:33,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:23:33,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:33,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 14:23:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:33,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952568272] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:33,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:23:33,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 16 [2025-03-17 14:23:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336683039] [2025-03-17 14:23:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:33,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:23:33,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:33,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:23:33,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:23:33,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-17 14:23:33,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:33,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:33,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-17 14:23:33,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:33,878 INFO L124 PetriNetUnfolderBase]: 443/779 cut-off events. [2025-03-17 14:23:33,879 INFO L125 PetriNetUnfolderBase]: For 88/106 co-relation queries the response was YES. [2025-03-17 14:23:33,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 779 events. 443/779 cut-off events. For 88/106 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3157 event pairs, 228 based on Foata normal form. 0/655 useless extension candidates. Maximal degree in co-relation 1628. Up to 463 conditions per place. [2025-03-17 14:23:33,882 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 39 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2025-03-17 14:23:33,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 212 flow [2025-03-17 14:23:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2025-03-17 14:23:33,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2025-03-17 14:23:33,884 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 86 flow. Second operand 5 states and 85 transitions. [2025-03-17 14:23:33,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 212 flow [2025-03-17 14:23:33,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 45 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:33,885 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 99 flow [2025-03-17 14:23:33,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2025-03-17 14:23:33,885 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2025-03-17 14:23:33,885 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 99 flow [2025-03-17 14:23:33,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:33,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:33,886 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:33,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:34,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:34,086 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:34,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:34,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1393464094, now seen corresponding path program 1 times [2025-03-17 14:23:34,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:34,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315538716] [2025-03-17 14:23:34,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:34,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:34,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:23:34,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:34,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:34,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:23:34,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315538716] [2025-03-17 14:23:34,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315538716] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525653412] [2025-03-17 14:23:34,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:34,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:34,271 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:34,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:23:34,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:23:34,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:34,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:34,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:34,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:23:34,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:34,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:34,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-17 14:23:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:34,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525653412] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:34,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:34,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2025-03-17 14:23:34,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453786685] [2025-03-17 14:23:34,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:34,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 14:23:34,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:34,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 14:23:34,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:23:34,794 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-17 14:23:34,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 99 flow. Second operand has 21 states, 21 states have (on average 11.142857142857142) internal successors, (234), 21 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:34,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:34,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-17 14:23:34,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:35,208 INFO L124 PetriNetUnfolderBase]: 815/1423 cut-off events. [2025-03-17 14:23:35,209 INFO L125 PetriNetUnfolderBase]: For 251/293 co-relation queries the response was YES. [2025-03-17 14:23:35,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 1423 events. 815/1423 cut-off events. For 251/293 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6658 event pairs, 218 based on Foata normal form. 0/1207 useless extension candidates. Maximal degree in co-relation 3181. Up to 441 conditions per place. [2025-03-17 14:23:35,214 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 75 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2025-03-17 14:23:35,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 85 transitions, 416 flow [2025-03-17 14:23:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:23:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:23:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2025-03-17 14:23:35,216 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2025-03-17 14:23:35,216 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 99 flow. Second operand 9 states and 162 transitions. [2025-03-17 14:23:35,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 85 transitions, 416 flow [2025-03-17 14:23:35,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 85 transitions, 404 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:35,217 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 127 flow [2025-03-17 14:23:35,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=127, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2025-03-17 14:23:35,219 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 10 predicate places. [2025-03-17 14:23:35,219 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 127 flow [2025-03-17 14:23:35,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.142857142857142) internal successors, (234), 21 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:35,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:35,219 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:35,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:35,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-17 14:23:35,421 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:35,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash 358870599, now seen corresponding path program 1 times [2025-03-17 14:23:35,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:35,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652738126] [2025-03-17 14:23:35,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:35,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:35,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:23:35,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:23:35,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:35,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:23:35,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:35,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652738126] [2025-03-17 14:23:35,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652738126] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:35,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161369276] [2025-03-17 14:23:35,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:35,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:35,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:35,640 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:35,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:23:35,680 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:23:35,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:23:35,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:35,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:35,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:23:35,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:35,813 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:35,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-17 14:23:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:35,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161369276] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:35,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:35,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2025-03-17 14:23:35,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613825524] [2025-03-17 14:23:35,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:35,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 14:23:35,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:35,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 14:23:35,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:23:36,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-17 14:23:36,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 127 flow. Second operand has 21 states, 21 states have (on average 11.428571428571429) internal successors, (240), 21 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:36,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:36,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-17 14:23:36,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:36,691 INFO L124 PetriNetUnfolderBase]: 1517/2633 cut-off events. [2025-03-17 14:23:36,691 INFO L125 PetriNetUnfolderBase]: For 1056/1094 co-relation queries the response was YES. [2025-03-17 14:23:36,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6132 conditions, 2633 events. 1517/2633 cut-off events. For 1056/1094 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13139 event pairs, 450 based on Foata normal form. 0/2219 useless extension candidates. Maximal degree in co-relation 6096. Up to 885 conditions per place. [2025-03-17 14:23:36,701 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 77 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2025-03-17 14:23:36,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 493 flow [2025-03-17 14:23:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:23:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:23:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2025-03-17 14:23:36,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46846846846846846 [2025-03-17 14:23:36,702 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 127 flow. Second operand 9 states and 156 transitions. [2025-03-17 14:23:36,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 493 flow [2025-03-17 14:23:36,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 87 transitions, 462 flow, removed 8 selfloop flow, removed 5 redundant places. [2025-03-17 14:23:36,704 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 148 flow [2025-03-17 14:23:36,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2025-03-17 14:23:36,704 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2025-03-17 14:23:36,704 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 148 flow [2025-03-17 14:23:36,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.428571428571429) internal successors, (240), 21 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:36,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:36,705 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2025-03-17 14:23:36,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:36,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:36,905 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:36,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2084335938, now seen corresponding path program 2 times [2025-03-17 14:23:36,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:36,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292377665] [2025-03-17 14:23:36,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:36,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:36,911 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:23:36,924 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:23:36,924 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:36,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:37,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:37,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292377665] [2025-03-17 14:23:37,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292377665] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:37,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510784571] [2025-03-17 14:23:37,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:37,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:37,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:37,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:37,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:23:37,168 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:23:37,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:23:37,185 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:37,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:37,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 14:23:37,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:37,223 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:23:37,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510784571] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:37,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:23:37,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2025-03-17 14:23:37,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997652178] [2025-03-17 14:23:37,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:37,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:23:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:37,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:23:37,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:23:37,228 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:37,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:37,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:37,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:37,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:37,499 INFO L124 PetriNetUnfolderBase]: 1341/2363 cut-off events. [2025-03-17 14:23:37,499 INFO L125 PetriNetUnfolderBase]: For 1128/1168 co-relation queries the response was YES. [2025-03-17 14:23:37,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5594 conditions, 2363 events. 1341/2363 cut-off events. For 1128/1168 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12251 event pairs, 20 based on Foata normal form. 0/2055 useless extension candidates. Maximal degree in co-relation 5555. Up to 595 conditions per place. [2025-03-17 14:23:37,510 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 94 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2025-03-17 14:23:37,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 100 transitions, 572 flow [2025-03-17 14:23:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:23:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:23:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2025-03-17 14:23:37,511 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2025-03-17 14:23:37,511 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 148 flow. Second operand 6 states and 142 transitions. [2025-03-17 14:23:37,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 100 transitions, 572 flow [2025-03-17 14:23:37,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 100 transitions, 526 flow, removed 10 selfloop flow, removed 9 redundant places. [2025-03-17 14:23:37,515 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 123 flow [2025-03-17 14:23:37,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2025-03-17 14:23:37,515 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2025-03-17 14:23:37,515 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 123 flow [2025-03-17 14:23:37,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:37,515 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:37,516 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:37,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:37,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:37,716 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:37,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash 849468300, now seen corresponding path program 1 times [2025-03-17 14:23:37,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:37,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716639659] [2025-03-17 14:23:37,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:37,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:37,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:23:37,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:23:37,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:37,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:37,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:37,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716639659] [2025-03-17 14:23:37,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716639659] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:37,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:37,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:23:37,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457234170] [2025-03-17 14:23:37,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:37,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:23:37,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:37,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:23:37,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:23:37,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:37,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:37,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:37,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:37,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:38,153 INFO L124 PetriNetUnfolderBase]: 1343/2417 cut-off events. [2025-03-17 14:23:38,153 INFO L125 PetriNetUnfolderBase]: For 1125/1125 co-relation queries the response was YES. [2025-03-17 14:23:38,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5780 conditions, 2417 events. 1343/2417 cut-off events. For 1125/1125 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12499 event pairs, 987 based on Foata normal form. 3/2244 useless extension candidates. Maximal degree in co-relation 5747. Up to 1808 conditions per place. [2025-03-17 14:23:38,161 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 52 selfloop transitions, 3 changer transitions 7/64 dead transitions. [2025-03-17 14:23:38,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 350 flow [2025-03-17 14:23:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2025-03-17 14:23:38,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2025-03-17 14:23:38,162 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 123 flow. Second operand 5 states and 104 transitions. [2025-03-17 14:23:38,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 350 flow [2025-03-17 14:23:38,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 329 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:23:38,164 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 136 flow [2025-03-17 14:23:38,165 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2025-03-17 14:23:38,165 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2025-03-17 14:23:38,165 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 136 flow [2025-03-17 14:23:38,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:38,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:38,165 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:38,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 14:23:38,165 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:38,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1471152492, now seen corresponding path program 2 times [2025-03-17 14:23:38,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:38,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070714640] [2025-03-17 14:23:38,166 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:38,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:38,171 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:23:38,177 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 24 statements. [2025-03-17 14:23:38,178 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:23:38,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:38,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:38,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070714640] [2025-03-17 14:23:38,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070714640] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:38,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:38,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:23:38,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530663542] [2025-03-17 14:23:38,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:38,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:23:38,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:38,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:23:38,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:23:38,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:38,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:38,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:38,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:38,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:38,540 INFO L124 PetriNetUnfolderBase]: 1344/2410 cut-off events. [2025-03-17 14:23:38,541 INFO L125 PetriNetUnfolderBase]: For 1587/1596 co-relation queries the response was YES. [2025-03-17 14:23:38,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6161 conditions, 2410 events. 1344/2410 cut-off events. For 1587/1596 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12978 event pairs, 966 based on Foata normal form. 1/2235 useless extension candidates. Maximal degree in co-relation 6125. Up to 1751 conditions per place. [2025-03-17 14:23:38,550 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 58 selfloop transitions, 3 changer transitions 9/72 dead transitions. [2025-03-17 14:23:38,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 430 flow [2025-03-17 14:23:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2025-03-17 14:23:38,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5783783783783784 [2025-03-17 14:23:38,551 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 136 flow. Second operand 5 states and 107 transitions. [2025-03-17 14:23:38,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 430 flow [2025-03-17 14:23:38,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 410 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:38,554 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 148 flow [2025-03-17 14:23:38,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2025-03-17 14:23:38,554 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2025-03-17 14:23:38,554 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 148 flow [2025-03-17 14:23:38,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:38,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:38,555 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:38,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 14:23:38,555 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:38,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:38,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2036187976, now seen corresponding path program 3 times [2025-03-17 14:23:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:38,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489206066] [2025-03-17 14:23:38,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:23:38,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:38,563 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 4 equivalence classes. [2025-03-17 14:23:38,569 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 18 of 24 statements. [2025-03-17 14:23:38,570 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:23:38,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:38,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:38,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489206066] [2025-03-17 14:23:38,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489206066] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:38,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:38,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:23:38,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138250168] [2025-03-17 14:23:38,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:38,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:23:38,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:38,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:23:38,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:23:38,731 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:38,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:38,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:38,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:38,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:39,004 INFO L124 PetriNetUnfolderBase]: 1441/2581 cut-off events. [2025-03-17 14:23:39,004 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2025-03-17 14:23:39,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7051 conditions, 2581 events. 1441/2581 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13501 event pairs, 993 based on Foata normal form. 3/2584 useless extension candidates. Maximal degree in co-relation 7013. Up to 1839 conditions per place. [2025-03-17 14:23:39,016 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 56 selfloop transitions, 10 changer transitions 5/73 dead transitions. [2025-03-17 14:23:39,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 445 flow [2025-03-17 14:23:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2025-03-17 14:23:39,017 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2025-03-17 14:23:39,017 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 148 flow. Second operand 5 states and 110 transitions. [2025-03-17 14:23:39,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 445 flow [2025-03-17 14:23:39,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 421 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:39,021 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 235 flow [2025-03-17 14:23:39,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2025-03-17 14:23:39,021 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2025-03-17 14:23:39,022 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 235 flow [2025-03-17 14:23:39,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:39,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:39,022 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:39,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 14:23:39,022 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:39,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:39,022 INFO L85 PathProgramCache]: Analyzing trace with hash 404904148, now seen corresponding path program 4 times [2025-03-17 14:23:39,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:39,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929551314] [2025-03-17 14:23:39,022 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:23:39,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:39,028 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:23:39,042 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:23:39,042 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:23:39,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:23:39,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929551314] [2025-03-17 14:23:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929551314] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517321044] [2025-03-17 14:23:39,278 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:23:39,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:39,280 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:39,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:23:39,328 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:23:39,346 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:23:39,346 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:23:39,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:39,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 14:23:39,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:39,491 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:23:39,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517321044] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:39,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:23:39,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2025-03-17 14:23:39,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996826658] [2025-03-17 14:23:39,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:39,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:23:39,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:39,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:23:39,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:23:39,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:39,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:39,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:39,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:39,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:39,752 INFO L124 PetriNetUnfolderBase]: 1457/2605 cut-off events. [2025-03-17 14:23:39,753 INFO L125 PetriNetUnfolderBase]: For 3206/3206 co-relation queries the response was YES. [2025-03-17 14:23:39,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 2605 events. 1457/2605 cut-off events. For 3206/3206 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 13924 event pairs, 976 based on Foata normal form. 1/2606 useless extension candidates. Maximal degree in co-relation 7727. Up to 1835 conditions per place. [2025-03-17 14:23:39,766 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 64 selfloop transitions, 11 changer transitions 4/81 dead transitions. [2025-03-17 14:23:39,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 570 flow [2025-03-17 14:23:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2025-03-17 14:23:39,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-03-17 14:23:39,766 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 235 flow. Second operand 5 states and 111 transitions. [2025-03-17 14:23:39,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 570 flow [2025-03-17 14:23:39,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 81 transitions, 564 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:23:39,772 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 330 flow [2025-03-17 14:23:39,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2025-03-17 14:23:39,773 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2025-03-17 14:23:39,774 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 330 flow [2025-03-17 14:23:39,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:39,774 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:39,774 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:39,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:39,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 14:23:39,978 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:39,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash 968769095, now seen corresponding path program 2 times [2025-03-17 14:23:39,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:39,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077041539] [2025-03-17 14:23:39,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:39,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:39,987 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:23:39,996 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:23:39,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:39,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:40,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077041539] [2025-03-17 14:23:40,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077041539] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032838806] [2025-03-17 14:23:40,201 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:40,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:40,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:40,203 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:40,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:23:40,255 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:23:40,276 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:23:40,276 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:40,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:40,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 14:23:40,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:40,312 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:23:40,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032838806] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:40,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:23:40,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2025-03-17 14:23:40,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753750065] [2025-03-17 14:23:40,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:40,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:23:40,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:40,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:23:40,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:23:40,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:40,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:40,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:40,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:40,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:40,579 INFO L124 PetriNetUnfolderBase]: 1351/2412 cut-off events. [2025-03-17 14:23:40,579 INFO L125 PetriNetUnfolderBase]: For 3861/3861 co-relation queries the response was YES. [2025-03-17 14:23:40,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7365 conditions, 2412 events. 1351/2412 cut-off events. For 3861/3861 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12260 event pairs, 107 based on Foata normal form. 44/2456 useless extension candidates. Maximal degree in co-relation 7322. Up to 698 conditions per place. [2025-03-17 14:23:40,588 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 96 selfloop transitions, 7 changer transitions 1/105 dead transitions. [2025-03-17 14:23:40,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 811 flow [2025-03-17 14:23:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:23:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:23:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2025-03-17 14:23:40,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2025-03-17 14:23:40,589 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 330 flow. Second operand 6 states and 135 transitions. [2025-03-17 14:23:40,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 811 flow [2025-03-17 14:23:40,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 105 transitions, 779 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-17 14:23:40,597 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 308 flow [2025-03-17 14:23:40,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2025-03-17 14:23:40,598 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2025-03-17 14:23:40,598 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 308 flow [2025-03-17 14:23:40,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:40,599 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:40,599 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:40,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:40,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:23:40,799 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:40,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2103429217, now seen corresponding path program 1 times [2025-03-17 14:23:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:40,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120108746] [2025-03-17 14:23:40,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:40,806 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 14:23:40,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:23:40,810 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:40,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:40,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:40,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120108746] [2025-03-17 14:23:40,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120108746] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:40,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:40,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:23:40,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943625680] [2025-03-17 14:23:40,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:40,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:40,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:40,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:40,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:40,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:40,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:40,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:40,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:40,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:41,157 INFO L124 PetriNetUnfolderBase]: 1578/2802 cut-off events. [2025-03-17 14:23:41,158 INFO L125 PetriNetUnfolderBase]: For 4171/4171 co-relation queries the response was YES. [2025-03-17 14:23:41,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8695 conditions, 2802 events. 1578/2802 cut-off events. For 4171/4171 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 15481 event pairs, 132 based on Foata normal form. 33/2835 useless extension candidates. Maximal degree in co-relation 8655. Up to 1466 conditions per place. [2025-03-17 14:23:41,166 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 84 selfloop transitions, 29 changer transitions 4/118 dead transitions. [2025-03-17 14:23:41,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 118 transitions, 962 flow [2025-03-17 14:23:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:23:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:23:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2025-03-17 14:23:41,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5598455598455598 [2025-03-17 14:23:41,168 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 308 flow. Second operand 7 states and 145 transitions. [2025-03-17 14:23:41,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 118 transitions, 962 flow [2025-03-17 14:23:41,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 118 transitions, 914 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:23:41,174 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 551 flow [2025-03-17 14:23:41,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=551, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2025-03-17 14:23:41,174 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2025-03-17 14:23:41,174 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 551 flow [2025-03-17 14:23:41,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:41,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:41,174 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:41,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 14:23:41,175 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:41,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:41,175 INFO L85 PathProgramCache]: Analyzing trace with hash 283211320, now seen corresponding path program 1 times [2025-03-17 14:23:41,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:41,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472726835] [2025-03-17 14:23:41,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:41,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:41,181 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 14:23:41,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:23:41,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:41,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:41,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:41,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472726835] [2025-03-17 14:23:41,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472726835] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:41,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132867255] [2025-03-17 14:23:41,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:41,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:41,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:41,246 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:41,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:23:41,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 14:23:41,312 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:23:41,312 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:41,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:41,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:23:41,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:41,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:41,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132867255] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:41,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:23:41,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-03-17 14:23:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717716113] [2025-03-17 14:23:41,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:41,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:41,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:41,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:23:41,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:41,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 551 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:41,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:41,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:41,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:41,655 INFO L124 PetriNetUnfolderBase]: 1707/3021 cut-off events. [2025-03-17 14:23:41,656 INFO L125 PetriNetUnfolderBase]: For 6480/6480 co-relation queries the response was YES. [2025-03-17 14:23:41,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10048 conditions, 3021 events. 1707/3021 cut-off events. For 6480/6480 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 16406 event pairs, 161 based on Foata normal form. 30/3051 useless extension candidates. Maximal degree in co-relation 10005. Up to 1611 conditions per place. [2025-03-17 14:23:41,667 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 71 selfloop transitions, 42 changer transitions 3/117 dead transitions. [2025-03-17 14:23:41,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 1123 flow [2025-03-17 14:23:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:23:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:23:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2025-03-17 14:23:41,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5173745173745173 [2025-03-17 14:23:41,668 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 551 flow. Second operand 7 states and 134 transitions. [2025-03-17 14:23:41,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 1123 flow [2025-03-17 14:23:41,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 1062 flow, removed 14 selfloop flow, removed 1 redundant places. [2025-03-17 14:23:41,681 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 825 flow [2025-03-17 14:23:41,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=825, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2025-03-17 14:23:41,681 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2025-03-17 14:23:41,682 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 825 flow [2025-03-17 14:23:41,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:41,682 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:41,682 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:41,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:41,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:41,886 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:41,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2137756144, now seen corresponding path program 2 times [2025-03-17 14:23:41,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:41,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850821825] [2025-03-17 14:23:41,886 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:41,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:41,892 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 14:23:41,901 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:23:41,904 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:41,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:41,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:41,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850821825] [2025-03-17 14:23:41,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850821825] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:41,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:41,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:23:41,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820586524] [2025-03-17 14:23:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:41,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:41,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:41,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:41,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:41,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:41,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 825 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:41,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:41,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:41,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:42,295 INFO L124 PetriNetUnfolderBase]: 1709/3038 cut-off events. [2025-03-17 14:23:42,296 INFO L125 PetriNetUnfolderBase]: For 9882/9882 co-relation queries the response was YES. [2025-03-17 14:23:42,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 3038 events. 1709/3038 cut-off events. For 9882/9882 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 16895 event pairs, 1068 based on Foata normal form. 6/3044 useless extension candidates. Maximal degree in co-relation 10837. Up to 2101 conditions per place. [2025-03-17 14:23:42,309 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 94 selfloop transitions, 18 changer transitions 1/114 dead transitions. [2025-03-17 14:23:42,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 1221 flow [2025-03-17 14:23:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2025-03-17 14:23:42,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2025-03-17 14:23:42,312 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 825 flow. Second operand 5 states and 110 transitions. [2025-03-17 14:23:42,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 1221 flow [2025-03-17 14:23:42,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 114 transitions, 1197 flow, removed 12 selfloop flow, removed 0 redundant places. [2025-03-17 14:23:42,332 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 877 flow [2025-03-17 14:23:42,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=877, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2025-03-17 14:23:42,332 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 46 predicate places. [2025-03-17 14:23:42,333 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 877 flow [2025-03-17 14:23:42,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:42,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:42,333 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:42,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-17 14:23:42,333 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:42,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:42,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1719591670, now seen corresponding path program 3 times [2025-03-17 14:23:42,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:42,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365488274] [2025-03-17 14:23:42,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:23:42,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:42,342 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-03-17 14:23:42,353 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 27 statements. [2025-03-17 14:23:42,353 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:23:42,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:42,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:42,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365488274] [2025-03-17 14:23:42,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365488274] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:42,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011597085] [2025-03-17 14:23:42,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:23:42,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:42,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:42,417 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:42,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:23:42,469 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-03-17 14:23:42,487 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 27 statements. [2025-03-17 14:23:42,487 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:23:42,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:42,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:23:42,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:42,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:42,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011597085] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:42,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:23:42,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2025-03-17 14:23:42,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100280566] [2025-03-17 14:23:42,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:42,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:42,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:42,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:23:42,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:42,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 877 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:42,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:42,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:42,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:42,920 INFO L124 PetriNetUnfolderBase]: 1820/3215 cut-off events. [2025-03-17 14:23:42,921 INFO L125 PetriNetUnfolderBase]: For 11270/11270 co-relation queries the response was YES. [2025-03-17 14:23:42,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11621 conditions, 3215 events. 1820/3215 cut-off events. For 11270/11270 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 17950 event pairs, 950 based on Foata normal form. 30/3245 useless extension candidates. Maximal degree in co-relation 11570. Up to 1837 conditions per place. [2025-03-17 14:23:42,939 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 76 selfloop transitions, 39 changer transitions 6/122 dead transitions. [2025-03-17 14:23:42,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 122 transitions, 1319 flow [2025-03-17 14:23:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2025-03-17 14:23:42,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6108108108108108 [2025-03-17 14:23:42,941 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 877 flow. Second operand 5 states and 113 transitions. [2025-03-17 14:23:42,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 122 transitions, 1319 flow [2025-03-17 14:23:42,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 122 transitions, 1258 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:42,966 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 955 flow [2025-03-17 14:23:42,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=955, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2025-03-17 14:23:42,967 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 50 predicate places. [2025-03-17 14:23:42,967 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 955 flow [2025-03-17 14:23:42,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:42,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:42,967 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:42,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:43,167 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,SelfDestructingSolverStorable20 [2025-03-17 14:23:43,168 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:43,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash 961057961, now seen corresponding path program 2 times [2025-03-17 14:23:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:43,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967868610] [2025-03-17 14:23:43,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:43,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:43,174 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 14:23:43,176 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 27 statements. [2025-03-17 14:23:43,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:23:43,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:43,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:43,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967868610] [2025-03-17 14:23:43,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967868610] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:43,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:43,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:23:43,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862064910] [2025-03-17 14:23:43,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:43,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:43,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:43,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:43,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:43,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:43,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 955 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:43,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:43,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:43,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:43,576 INFO L124 PetriNetUnfolderBase]: 2059/3656 cut-off events. [2025-03-17 14:23:43,576 INFO L125 PetriNetUnfolderBase]: For 15303/15303 co-relation queries the response was YES. [2025-03-17 14:23:43,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13839 conditions, 3656 events. 2059/3656 cut-off events. For 15303/15303 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 21174 event pairs, 1137 based on Foata normal form. 33/3689 useless extension candidates. Maximal degree in co-relation 13786. Up to 2155 conditions per place. [2025-03-17 14:23:43,624 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 98 selfloop transitions, 37 changer transitions 5/141 dead transitions. [2025-03-17 14:23:43,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 141 transitions, 1623 flow [2025-03-17 14:23:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:23:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:23:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2025-03-17 14:23:43,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5752895752895753 [2025-03-17 14:23:43,626 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 955 flow. Second operand 7 states and 149 transitions. [2025-03-17 14:23:43,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 141 transitions, 1623 flow [2025-03-17 14:23:43,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 141 transitions, 1511 flow, removed 7 selfloop flow, removed 5 redundant places. [2025-03-17 14:23:43,654 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 1236 flow [2025-03-17 14:23:43,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1236, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2025-03-17 14:23:43,654 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 54 predicate places. [2025-03-17 14:23:43,654 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 1236 flow [2025-03-17 14:23:43,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:43,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:43,654 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:43,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-17 14:23:43,655 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:43,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:43,655 INFO L85 PathProgramCache]: Analyzing trace with hash -2024803091, now seen corresponding path program 3 times [2025-03-17 14:23:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:43,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982245891] [2025-03-17 14:23:43,656 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:23:43,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:43,663 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-03-17 14:23:43,675 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 27 statements. [2025-03-17 14:23:43,675 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:23:43,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:43,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:43,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982245891] [2025-03-17 14:23:43,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982245891] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:43,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:43,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:23:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218774696] [2025-03-17 14:23:43,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:43,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:43,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:43,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:43,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:43,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:43,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 1236 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:43,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:43,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:43,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:44,054 INFO L124 PetriNetUnfolderBase]: 2044/3599 cut-off events. [2025-03-17 14:23:44,054 INFO L125 PetriNetUnfolderBase]: For 16055/16055 co-relation queries the response was YES. [2025-03-17 14:23:44,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13979 conditions, 3599 events. 2044/3599 cut-off events. For 16055/16055 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 20581 event pairs, 1283 based on Foata normal form. 2/3601 useless extension candidates. Maximal degree in co-relation 13924. Up to 2516 conditions per place. [2025-03-17 14:23:44,068 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 101 selfloop transitions, 16 changer transitions 6/124 dead transitions. [2025-03-17 14:23:44,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 124 transitions, 1567 flow [2025-03-17 14:23:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2025-03-17 14:23:44,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2025-03-17 14:23:44,069 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 1236 flow. Second operand 5 states and 104 transitions. [2025-03-17 14:23:44,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 124 transitions, 1567 flow [2025-03-17 14:23:44,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 124 transitions, 1539 flow, removed 8 selfloop flow, removed 1 redundant places. [2025-03-17 14:23:44,095 INFO L231 Difference]: Finished difference. Result has 94 places, 98 transitions, 1208 flow [2025-03-17 14:23:44,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1208, PETRI_PLACES=94, PETRI_TRANSITIONS=98} [2025-03-17 14:23:44,095 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 58 predicate places. [2025-03-17 14:23:44,095 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 98 transitions, 1208 flow [2025-03-17 14:23:44,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:44,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:44,095 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:44,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-17 14:23:44,096 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:44,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash -264995380, now seen corresponding path program 4 times [2025-03-17 14:23:44,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:44,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677496617] [2025-03-17 14:23:44,096 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:23:44,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:44,101 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-17 14:23:44,105 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:23:44,106 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:23:44,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:44,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:44,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677496617] [2025-03-17 14:23:44,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677496617] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:44,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:44,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:23:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355248157] [2025-03-17 14:23:44,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:44,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:44,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:44,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:44,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:44,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 98 transitions, 1208 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:44,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:44,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:44,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:44,492 INFO L124 PetriNetUnfolderBase]: 2039/3603 cut-off events. [2025-03-17 14:23:44,493 INFO L125 PetriNetUnfolderBase]: For 15804/15804 co-relation queries the response was YES. [2025-03-17 14:23:44,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13900 conditions, 3603 events. 2039/3603 cut-off events. For 15804/15804 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 20335 event pairs, 1177 based on Foata normal form. 6/3609 useless extension candidates. Maximal degree in co-relation 13843. Up to 2254 conditions per place. [2025-03-17 14:23:44,507 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 102 selfloop transitions, 26 changer transitions 1/130 dead transitions. [2025-03-17 14:23:44,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 130 transitions, 1669 flow [2025-03-17 14:23:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2025-03-17 14:23:44,508 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5837837837837838 [2025-03-17 14:23:44,508 INFO L175 Difference]: Start difference. First operand has 94 places, 98 transitions, 1208 flow. Second operand 5 states and 108 transitions. [2025-03-17 14:23:44,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 130 transitions, 1669 flow [2025-03-17 14:23:44,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1615 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-03-17 14:23:44,537 INFO L231 Difference]: Finished difference. Result has 93 places, 102 transitions, 1313 flow [2025-03-17 14:23:44,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1313, PETRI_PLACES=93, PETRI_TRANSITIONS=102} [2025-03-17 14:23:44,538 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2025-03-17 14:23:44,538 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 102 transitions, 1313 flow [2025-03-17 14:23:44,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:44,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:44,538 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:44,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-17 14:23:44,538 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:44,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2137170398, now seen corresponding path program 5 times [2025-03-17 14:23:44,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:44,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340271110] [2025-03-17 14:23:44,539 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:23:44,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:44,544 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-03-17 14:23:44,548 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:23:44,548 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:23:44,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:44,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:44,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340271110] [2025-03-17 14:23:44,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340271110] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:44,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:44,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:23:44,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620236030] [2025-03-17 14:23:44,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:44,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:44,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:44,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:44,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:44,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:44,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 102 transitions, 1313 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:44,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:44,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:44,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:45,060 INFO L124 PetriNetUnfolderBase]: 2017/3540 cut-off events. [2025-03-17 14:23:45,060 INFO L125 PetriNetUnfolderBase]: For 17982/17982 co-relation queries the response was YES. [2025-03-17 14:23:45,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14386 conditions, 3540 events. 2017/3540 cut-off events. For 17982/17982 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 19724 event pairs, 1051 based on Foata normal form. 30/3570 useless extension candidates. Maximal degree in co-relation 14328. Up to 1969 conditions per place. [2025-03-17 14:23:45,078 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 101 selfloop transitions, 34 changer transitions 9/145 dead transitions. [2025-03-17 14:23:45,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 145 transitions, 1821 flow [2025-03-17 14:23:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:23:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:23:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2025-03-17 14:23:45,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-03-17 14:23:45,079 INFO L175 Difference]: Start difference. First operand has 93 places, 102 transitions, 1313 flow. Second operand 7 states and 148 transitions. [2025-03-17 14:23:45,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 145 transitions, 1821 flow [2025-03-17 14:23:45,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 145 transitions, 1774 flow, removed 13 selfloop flow, removed 1 redundant places. [2025-03-17 14:23:45,112 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 1393 flow [2025-03-17 14:23:45,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1393, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2025-03-17 14:23:45,113 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 65 predicate places. [2025-03-17 14:23:45,113 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 1393 flow [2025-03-17 14:23:45,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:45,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:45,113 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:45,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-17 14:23:45,113 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:45,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:45,113 INFO L85 PathProgramCache]: Analyzing trace with hash 500625445, now seen corresponding path program 4 times [2025-03-17 14:23:45,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:45,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252174117] [2025-03-17 14:23:45,114 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:23:45,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:45,121 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-17 14:23:45,136 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:23:45,137 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:23:45,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252174117] [2025-03-17 14:23:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252174117] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049328730] [2025-03-17 14:23:45,192 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:23:45,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:45,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:45,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:23:45,247 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-17 14:23:45,267 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:23:45,267 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:23:45,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:45,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:23:45,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:45,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:45,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049328730] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:45,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:23:45,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2025-03-17 14:23:45,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117787064] [2025-03-17 14:23:45,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:45,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:45,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:45,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:45,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:23:45,387 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:45,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 1393 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:45,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:45,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:45,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:45,709 INFO L124 PetriNetUnfolderBase]: 1955/3418 cut-off events. [2025-03-17 14:23:45,709 INFO L125 PetriNetUnfolderBase]: For 18553/18553 co-relation queries the response was YES. [2025-03-17 14:23:45,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13993 conditions, 3418 events. 1955/3418 cut-off events. For 18553/18553 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 18847 event pairs, 891 based on Foata normal form. 33/3451 useless extension candidates. Maximal degree in co-relation 13932. Up to 1945 conditions per place. [2025-03-17 14:23:45,724 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 93 selfloop transitions, 34 changer transitions 6/134 dead transitions. [2025-03-17 14:23:45,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 1816 flow [2025-03-17 14:23:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2025-03-17 14:23:45,725 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2025-03-17 14:23:45,726 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 1393 flow. Second operand 5 states and 105 transitions. [2025-03-17 14:23:45,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 1816 flow [2025-03-17 14:23:45,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 134 transitions, 1647 flow, removed 10 selfloop flow, removed 9 redundant places. [2025-03-17 14:23:45,754 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 1293 flow [2025-03-17 14:23:45,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1293, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2025-03-17 14:23:45,755 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2025-03-17 14:23:45,755 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 1293 flow [2025-03-17 14:23:45,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:45,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:45,755 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:45,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:45,960 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,SelfDestructingSolverStorable25 [2025-03-17 14:23:45,960 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:45,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 230473769, now seen corresponding path program 1 times [2025-03-17 14:23:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:45,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324688093] [2025-03-17 14:23:45,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:45,967 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 14:23:45,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:23:45,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:45,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:46,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:46,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324688093] [2025-03-17 14:23:46,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324688093] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:46,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438046205] [2025-03-17 14:23:46,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:46,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:46,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:46,541 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:46,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:23:46,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 14:23:46,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:23:46,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:46,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:46,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 14:23:46,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:46,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 106 [2025-03-17 14:23:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:47,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:48,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:23:48,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 165 [2025-03-17 14:23:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:48,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438046205] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:48,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:48,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2025-03-17 14:23:48,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182813050] [2025-03-17 14:23:48,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:48,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 14:23:48,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:48,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 14:23:48,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:23:48,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:48,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 1293 flow. Second operand has 25 states, 25 states have (on average 12.64) internal successors, (316), 25 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:48,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:48,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:48,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:52,738 INFO L124 PetriNetUnfolderBase]: 2696/4759 cut-off events. [2025-03-17 14:23:52,738 INFO L125 PetriNetUnfolderBase]: For 20920/20920 co-relation queries the response was YES. [2025-03-17 14:23:52,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19160 conditions, 4759 events. 2696/4759 cut-off events. For 20920/20920 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 28895 event pairs, 501 based on Foata normal form. 8/4767 useless extension candidates. Maximal degree in co-relation 19103. Up to 1004 conditions per place. [2025-03-17 14:23:52,760 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 229 selfloop transitions, 224 changer transitions 34/488 dead transitions. [2025-03-17 14:23:52,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 488 transitions, 5053 flow [2025-03-17 14:23:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-17 14:23:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-03-17 14:23:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 789 transitions. [2025-03-17 14:23:52,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47387387387387386 [2025-03-17 14:23:52,762 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 1293 flow. Second operand 45 states and 789 transitions. [2025-03-17 14:23:52,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 488 transitions, 5053 flow [2025-03-17 14:23:52,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 488 transitions, 4628 flow, removed 68 selfloop flow, removed 6 redundant places. [2025-03-17 14:23:52,802 INFO L231 Difference]: Finished difference. Result has 147 places, 278 transitions, 3740 flow [2025-03-17 14:23:52,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3740, PETRI_PLACES=147, PETRI_TRANSITIONS=278} [2025-03-17 14:23:52,802 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 111 predicate places. [2025-03-17 14:23:52,802 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 278 transitions, 3740 flow [2025-03-17 14:23:52,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.64) internal successors, (316), 25 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:52,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:52,802 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:52,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:53,007 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,SelfDestructingSolverStorable26 [2025-03-17 14:23:53,007 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:53,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash -893731387, now seen corresponding path program 2 times [2025-03-17 14:23:53,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:53,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052441364] [2025-03-17 14:23:53,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:53,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:53,013 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 14:23:53,027 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:23:53,028 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:53,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:53,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:53,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052441364] [2025-03-17 14:23:53,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052441364] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:53,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299292113] [2025-03-17 14:23:53,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:53,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:53,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:53,501 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:53,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:23:53,553 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 14:23:53,576 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:23:53,576 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:53,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:53,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 14:23:53,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:53,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 89 [2025-03-17 14:23:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:53,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:54,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:23:54,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 160 [2025-03-17 14:23:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:55,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299292113] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:55,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:55,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 24 [2025-03-17 14:23:55,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521774921] [2025-03-17 14:23:55,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:55,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:23:55,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:55,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:23:55,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2025-03-17 14:23:55,162 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:23:55,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 278 transitions, 3740 flow. Second operand has 24 states, 24 states have (on average 12.666666666666666) internal successors, (304), 24 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:55,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:55,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:23:55,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:56,068 INFO L124 PetriNetUnfolderBase]: 2771/4881 cut-off events. [2025-03-17 14:23:56,069 INFO L125 PetriNetUnfolderBase]: For 29241/29241 co-relation queries the response was YES. [2025-03-17 14:23:56,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22735 conditions, 4881 events. 2771/4881 cut-off events. For 29241/29241 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 29842 event pairs, 1089 based on Foata normal form. 1/4882 useless extension candidates. Maximal degree in co-relation 22663. Up to 2361 conditions per place. [2025-03-17 14:23:56,093 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 206 selfloop transitions, 134 changer transitions 5/346 dead transitions. [2025-03-17 14:23:56,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 346 transitions, 4933 flow [2025-03-17 14:23:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:23:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:23:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2025-03-17 14:23:56,094 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48873873873873874 [2025-03-17 14:23:56,094 INFO L175 Difference]: Start difference. First operand has 147 places, 278 transitions, 3740 flow. Second operand 12 states and 217 transitions. [2025-03-17 14:23:56,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 346 transitions, 4933 flow [2025-03-17 14:23:56,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 346 transitions, 4437 flow, removed 211 selfloop flow, removed 10 redundant places. [2025-03-17 14:23:56,236 INFO L231 Difference]: Finished difference. Result has 150 places, 292 transitions, 3931 flow [2025-03-17 14:23:56,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3931, PETRI_PLACES=150, PETRI_TRANSITIONS=292} [2025-03-17 14:23:56,236 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 114 predicate places. [2025-03-17 14:23:56,236 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 292 transitions, 3931 flow [2025-03-17 14:23:56,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.666666666666666) internal successors, (304), 24 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:56,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:56,237 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:56,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 14:23:56,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:56,437 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:23:56,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:56,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1995019201, now seen corresponding path program 3 times [2025-03-17 14:23:56,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:56,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135324517] [2025-03-17 14:23:56,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:23:56,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:56,443 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-03-17 14:23:56,461 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 30 statements. [2025-03-17 14:23:56,462 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:23:56,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:56,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:56,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135324517] [2025-03-17 14:23:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135324517] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:56,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439512883] [2025-03-17 14:23:56,918 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:23:56,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:56,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:56,920 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:56,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:23:56,976 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-03-17 14:23:56,995 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 30 statements. [2025-03-17 14:23:56,996 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:23:56,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:56,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-17 14:23:56,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:57,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2025-03-17 14:23:57,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-03-17 14:23:57,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 105 [2025-03-17 14:23:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:57,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:58,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:23:58,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 371 treesize of output 251 [2025-03-17 14:23:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:23:59,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439512883] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:59,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:59,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2025-03-17 14:23:59,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974032068] [2025-03-17 14:23:59,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:59,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 14:23:59,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:59,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 14:23:59,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:23:59,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-17 14:23:59,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 292 transitions, 3931 flow. Second operand has 25 states, 25 states have (on average 10.56) internal successors, (264), 25 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:59,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:59,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-17 14:23:59,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:02,624 INFO L124 PetriNetUnfolderBase]: 3494/6348 cut-off events. [2025-03-17 14:24:02,624 INFO L125 PetriNetUnfolderBase]: For 36343/36343 co-relation queries the response was YES. [2025-03-17 14:24:02,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28827 conditions, 6348 events. 3494/6348 cut-off events. For 36343/36343 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 42346 event pairs, 815 based on Foata normal form. 10/6358 useless extension candidates. Maximal degree in co-relation 28757. Up to 2037 conditions per place. [2025-03-17 14:24:02,655 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 221 selfloop transitions, 350 changer transitions 33/605 dead transitions. [2025-03-17 14:24:02,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 605 transitions, 7479 flow [2025-03-17 14:24:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-17 14:24:02,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-03-17 14:24:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 563 transitions. [2025-03-17 14:24:02,657 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42267267267267267 [2025-03-17 14:24:02,657 INFO L175 Difference]: Start difference. First operand has 150 places, 292 transitions, 3931 flow. Second operand 36 states and 563 transitions. [2025-03-17 14:24:02,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 605 transitions, 7479 flow [2025-03-17 14:24:02,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 605 transitions, 7439 flow, removed 5 selfloop flow, removed 5 redundant places. [2025-03-17 14:24:02,820 INFO L231 Difference]: Finished difference. Result has 197 places, 431 transitions, 6807 flow [2025-03-17 14:24:02,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6807, PETRI_PLACES=197, PETRI_TRANSITIONS=431} [2025-03-17 14:24:02,820 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 161 predicate places. [2025-03-17 14:24:02,821 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 431 transitions, 6807 flow [2025-03-17 14:24:02,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.56) internal successors, (264), 25 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:02,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:02,821 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:02,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-17 14:24:03,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-17 14:24:03,021 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:24:03,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:03,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1323030219, now seen corresponding path program 4 times [2025-03-17 14:24:03,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:03,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609217854] [2025-03-17 14:24:03,022 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:24:03,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:03,028 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-17 14:24:03,035 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:24:03,035 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:24:03,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:03,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:03,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609217854] [2025-03-17 14:24:03,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609217854] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:03,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:03,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 14:24:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118981953] [2025-03-17 14:24:03,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:03,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:24:03,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:03,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:24:03,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:24:03,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:24:03,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 431 transitions, 6807 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:03,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:03,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:24:03,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:04,616 INFO L124 PetriNetUnfolderBase]: 3591/6511 cut-off events. [2025-03-17 14:24:04,616 INFO L125 PetriNetUnfolderBase]: For 79242/79242 co-relation queries the response was YES. [2025-03-17 14:24:04,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37189 conditions, 6511 events. 3591/6511 cut-off events. For 79242/79242 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 43793 event pairs, 1976 based on Foata normal form. 1/6512 useless extension candidates. Maximal degree in co-relation 37101. Up to 5056 conditions per place. [2025-03-17 14:24:04,659 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 408 selfloop transitions, 89 changer transitions 9/507 dead transitions. [2025-03-17 14:24:04,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 507 transitions, 8564 flow [2025-03-17 14:24:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:24:04,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:24:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 233 transitions. [2025-03-17 14:24:04,661 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48440748440748443 [2025-03-17 14:24:04,661 INFO L175 Difference]: Start difference. First operand has 197 places, 431 transitions, 6807 flow. Second operand 13 states and 233 transitions. [2025-03-17 14:24:04,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 507 transitions, 8564 flow [2025-03-17 14:24:05,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 507 transitions, 8336 flow, removed 79 selfloop flow, removed 8 redundant places. [2025-03-17 14:24:05,141 INFO L231 Difference]: Finished difference. Result has 204 places, 452 transitions, 7223 flow [2025-03-17 14:24:05,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6585, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7223, PETRI_PLACES=204, PETRI_TRANSITIONS=452} [2025-03-17 14:24:05,141 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 168 predicate places. [2025-03-17 14:24:05,142 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 452 transitions, 7223 flow [2025-03-17 14:24:05,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:05,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:05,142 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:05,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-17 14:24:05,142 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:24:05,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1168839497, now seen corresponding path program 5 times [2025-03-17 14:24:05,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:05,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475987634] [2025-03-17 14:24:05,142 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:24:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:05,148 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-03-17 14:24:05,157 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:24:05,157 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:24:05,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:24:05,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:05,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475987634] [2025-03-17 14:24:05,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475987634] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:05,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70095627] [2025-03-17 14:24:05,795 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:24:05,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:05,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:05,797 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:05,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 14:24:05,848 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-03-17 14:24:05,869 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:24:05,869 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:24:05,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:05,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 14:24:05,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:06,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 118 [2025-03-17 14:24:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:06,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:07,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:24:07,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 232 [2025-03-17 14:24:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:08,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70095627] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:08,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:08,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2025-03-17 14:24:08,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224456289] [2025-03-17 14:24:08,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:08,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-17 14:24:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:08,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-17 14:24:08,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2025-03-17 14:24:08,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:24:08,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 452 transitions, 7223 flow. Second operand has 31 states, 31 states have (on average 12.387096774193548) internal successors, (384), 31 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:08,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:08,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:24:08,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:12,378 INFO L124 PetriNetUnfolderBase]: 4272/7912 cut-off events. [2025-03-17 14:24:12,378 INFO L125 PetriNetUnfolderBase]: For 112709/112709 co-relation queries the response was YES. [2025-03-17 14:24:12,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46243 conditions, 7912 events. 4272/7912 cut-off events. For 112709/112709 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 56220 event pairs, 1158 based on Foata normal form. 11/7923 useless extension candidates. Maximal degree in co-relation 46153. Up to 2846 conditions per place. [2025-03-17 14:24:12,425 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 240 selfloop transitions, 525 changer transitions 34/800 dead transitions. [2025-03-17 14:24:12,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 800 transitions, 12829 flow [2025-03-17 14:24:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-17 14:24:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-03-17 14:24:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 650 transitions. [2025-03-17 14:24:12,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4747991234477721 [2025-03-17 14:24:12,426 INFO L175 Difference]: Start difference. First operand has 204 places, 452 transitions, 7223 flow. Second operand 37 states and 650 transitions. [2025-03-17 14:24:12,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 800 transitions, 12829 flow [2025-03-17 14:24:13,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 800 transitions, 12571 flow, removed 74 selfloop flow, removed 6 redundant places. [2025-03-17 14:24:13,190 INFO L231 Difference]: Finished difference. Result has 246 places, 619 transitions, 11688 flow [2025-03-17 14:24:13,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=11688, PETRI_PLACES=246, PETRI_TRANSITIONS=619} [2025-03-17 14:24:13,190 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 210 predicate places. [2025-03-17 14:24:13,191 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 619 transitions, 11688 flow [2025-03-17 14:24:13,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 12.387096774193548) internal successors, (384), 31 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:13,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:13,191 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:13,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-17 14:24:13,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:13,391 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:24:13,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:13,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1156128233, now seen corresponding path program 6 times [2025-03-17 14:24:13,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:13,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009933551] [2025-03-17 14:24:13,392 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:24:13,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:13,398 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-03-17 14:24:13,408 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-03-17 14:24:13,409 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 14:24:13,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:14,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:14,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009933551] [2025-03-17 14:24:14,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009933551] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:14,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319617972] [2025-03-17 14:24:14,029 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:24:14,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:14,030 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:14,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 14:24:14,085 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-03-17 14:24:14,105 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-03-17 14:24:14,105 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 14:24:14,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:14,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 14:24:14,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:14,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 89 [2025-03-17 14:24:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:14,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:15,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:24:15,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 330 treesize of output 214 [2025-03-17 14:24:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:15,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319617972] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:15,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:15,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 28 [2025-03-17 14:24:15,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315025846] [2025-03-17 14:24:15,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:15,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 14:24:15,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:15,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 14:24:15,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2025-03-17 14:24:16,203 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:24:16,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 619 transitions, 11688 flow. Second operand has 28 states, 28 states have (on average 12.25) internal successors, (343), 28 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:16,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:16,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:24:16,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:19,224 INFO L124 PetriNetUnfolderBase]: 4457/8238 cut-off events. [2025-03-17 14:24:19,224 INFO L125 PetriNetUnfolderBase]: For 144662/144662 co-relation queries the response was YES. [2025-03-17 14:24:19,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52898 conditions, 8238 events. 4457/8238 cut-off events. For 144662/144662 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 58796 event pairs, 1167 based on Foata normal form. 2/8240 useless extension candidates. Maximal degree in co-relation 52796. Up to 2363 conditions per place. [2025-03-17 14:24:19,302 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 425 selfloop transitions, 426 changer transitions 19/871 dead transitions. [2025-03-17 14:24:19,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 871 transitions, 17001 flow [2025-03-17 14:24:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 14:24:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-17 14:24:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 482 transitions. [2025-03-17 14:24:19,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46525096525096526 [2025-03-17 14:24:19,304 INFO L175 Difference]: Start difference. First operand has 246 places, 619 transitions, 11688 flow. Second operand 28 states and 482 transitions. [2025-03-17 14:24:19,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 871 transitions, 17001 flow [2025-03-17 14:24:20,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 871 transitions, 15738 flow, removed 403 selfloop flow, removed 11 redundant places. [2025-03-17 14:24:20,638 INFO L231 Difference]: Finished difference. Result has 273 places, 706 transitions, 13601 flow [2025-03-17 14:24:20,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10779, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13601, PETRI_PLACES=273, PETRI_TRANSITIONS=706} [2025-03-17 14:24:20,638 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 237 predicate places. [2025-03-17 14:24:20,638 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 706 transitions, 13601 flow [2025-03-17 14:24:20,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.25) internal successors, (343), 28 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:20,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:20,639 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:20,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-17 14:24:20,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:20,839 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:24:20,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1358435103, now seen corresponding path program 7 times [2025-03-17 14:24:20,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:20,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662798246] [2025-03-17 14:24:20,840 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:24:20,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:20,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 14:24:20,852 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:24:20,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:20,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:21,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662798246] [2025-03-17 14:24:21,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662798246] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839801308] [2025-03-17 14:24:21,413 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:24:21,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:21,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:21,415 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:21,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 14:24:21,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 14:24:21,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:24:21,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:21,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:21,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 14:24:21,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:21,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 105 [2025-03-17 14:24:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:22,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:23,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:24:23,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 196 [2025-03-17 14:24:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:23,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839801308] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:23,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:23,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2025-03-17 14:24:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554719151] [2025-03-17 14:24:23,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:23,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 14:24:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:23,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 14:24:23,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2025-03-17 14:24:24,006 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:24:24,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 706 transitions, 13601 flow. Second operand has 27 states, 27 states have (on average 12.407407407407407) internal successors, (335), 27 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:24,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:24,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:24:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:28,507 INFO L124 PetriNetUnfolderBase]: 4863/9027 cut-off events. [2025-03-17 14:24:28,508 INFO L125 PetriNetUnfolderBase]: For 124300/124300 co-relation queries the response was YES. [2025-03-17 14:24:28,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57856 conditions, 9027 events. 4863/9027 cut-off events. For 124300/124300 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 66250 event pairs, 1497 based on Foata normal form. 10/9037 useless extension candidates. Maximal degree in co-relation 57747. Up to 3802 conditions per place. [2025-03-17 14:24:28,583 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 315 selfloop transitions, 649 changer transitions 38/1003 dead transitions. [2025-03-17 14:24:28,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1003 transitions, 19192 flow [2025-03-17 14:24:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-17 14:24:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2025-03-17 14:24:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 688 transitions. [2025-03-17 14:24:28,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4648648648648649 [2025-03-17 14:24:28,585 INFO L175 Difference]: Start difference. First operand has 273 places, 706 transitions, 13601 flow. Second operand 40 states and 688 transitions. [2025-03-17 14:24:28,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1003 transitions, 19192 flow [2025-03-17 14:24:29,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1003 transitions, 18407 flow, removed 214 selfloop flow, removed 5 redundant places. [2025-03-17 14:24:29,965 INFO L231 Difference]: Finished difference. Result has 327 places, 808 transitions, 17299 flow [2025-03-17 14:24:29,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=13021, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=550, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=17299, PETRI_PLACES=327, PETRI_TRANSITIONS=808} [2025-03-17 14:24:29,966 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 291 predicate places. [2025-03-17 14:24:29,966 INFO L471 AbstractCegarLoop]: Abstraction has has 327 places, 808 transitions, 17299 flow [2025-03-17 14:24:29,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 12.407407407407407) internal successors, (335), 27 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:29,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:29,967 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:29,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:30,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:30,167 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:24:30,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1019267243, now seen corresponding path program 8 times [2025-03-17 14:24:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:30,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464512880] [2025-03-17 14:24:30,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:30,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:30,174 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 14:24:30,190 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:24:30,190 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:30,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:30,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:30,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464512880] [2025-03-17 14:24:30,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464512880] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:30,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685242624] [2025-03-17 14:24:30,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:30,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:30,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:30,823 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:30,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 14:24:30,876 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 14:24:30,897 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:24:30,897 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:30,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:30,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 14:24:30,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:31,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 106 [2025-03-17 14:24:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:31,318 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:32,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:24:32,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 237 [2025-03-17 14:24:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:33,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685242624] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:33,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:33,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 22 [2025-03-17 14:24:33,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16424824] [2025-03-17 14:24:33,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:33,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:24:33,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:33,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:24:33,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:24:33,189 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:24:33,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 808 transitions, 17299 flow. Second operand has 22 states, 22 states have (on average 12.772727272727273) internal successors, (281), 22 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:33,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:33,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:24:33,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:36,776 INFO L124 PetriNetUnfolderBase]: 5031/9360 cut-off events. [2025-03-17 14:24:36,776 INFO L125 PetriNetUnfolderBase]: For 138270/138270 co-relation queries the response was YES. [2025-03-17 14:24:36,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62997 conditions, 9360 events. 5031/9360 cut-off events. For 138270/138270 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 69418 event pairs, 1578 based on Foata normal form. 10/9370 useless extension candidates. Maximal degree in co-relation 62867. Up to 3970 conditions per place. [2025-03-17 14:24:36,881 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 331 selfloop transitions, 636 changer transitions 30/998 dead transitions. [2025-03-17 14:24:36,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 998 transitions, 21709 flow [2025-03-17 14:24:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 14:24:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-17 14:24:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 475 transitions. [2025-03-17 14:24:36,882 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4754754754754755 [2025-03-17 14:24:36,883 INFO L175 Difference]: Start difference. First operand has 327 places, 808 transitions, 17299 flow. Second operand 27 states and 475 transitions. [2025-03-17 14:24:36,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 998 transitions, 21709 flow [2025-03-17 14:24:38,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 998 transitions, 21485 flow, removed 102 selfloop flow, removed 7 redundant places. [2025-03-17 14:24:38,694 INFO L231 Difference]: Finished difference. Result has 357 places, 863 transitions, 20502 flow [2025-03-17 14:24:38,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=17062, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20502, PETRI_PLACES=357, PETRI_TRANSITIONS=863} [2025-03-17 14:24:38,694 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 321 predicate places. [2025-03-17 14:24:38,694 INFO L471 AbstractCegarLoop]: Abstraction has has 357 places, 863 transitions, 20502 flow [2025-03-17 14:24:38,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.772727272727273) internal successors, (281), 22 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:38,695 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:38,695 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:38,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-17 14:24:38,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:38,895 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:24:38,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash -31914139, now seen corresponding path program 9 times [2025-03-17 14:24:38,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:38,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14292558] [2025-03-17 14:24:38,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:38,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:38,901 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-03-17 14:24:38,909 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 30 statements. [2025-03-17 14:24:38,909 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:24:38,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:39,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:39,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14292558] [2025-03-17 14:24:39,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14292558] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:39,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386743495] [2025-03-17 14:24:39,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:39,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:39,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:39,304 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:39,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 14:24:39,358 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-03-17 14:24:39,374 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 30 statements. [2025-03-17 14:24:39,374 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:24:39,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:39,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 14:24:39,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:39,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 102 [2025-03-17 14:24:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:39,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:40,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:24:40,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 151 [2025-03-17 14:24:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:40,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386743495] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:40,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:40,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2025-03-17 14:24:40,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114994438] [2025-03-17 14:24:40,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:40,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:24:40,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:40,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:24:40,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2025-03-17 14:24:40,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:24:40,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 863 transitions, 20502 flow. Second operand has 24 states, 24 states have (on average 12.708333333333334) internal successors, (305), 24 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:40,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:40,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:24:40,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:43,504 INFO L124 PetriNetUnfolderBase]: 5007/9301 cut-off events. [2025-03-17 14:24:43,504 INFO L125 PetriNetUnfolderBase]: For 171686/171686 co-relation queries the response was YES. [2025-03-17 14:24:43,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67507 conditions, 9301 events. 5007/9301 cut-off events. For 171686/171686 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 68854 event pairs, 1959 based on Foata normal form. 2/9303 useless extension candidates. Maximal degree in co-relation 67365. Up to 4904 conditions per place. [2025-03-17 14:24:43,593 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 494 selfloop transitions, 427 changer transitions 10/932 dead transitions. [2025-03-17 14:24:43,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 932 transitions, 23247 flow [2025-03-17 14:24:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:24:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:24:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2025-03-17 14:24:43,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48423423423423423 [2025-03-17 14:24:43,594 INFO L175 Difference]: Start difference. First operand has 357 places, 863 transitions, 20502 flow. Second operand 12 states and 215 transitions. [2025-03-17 14:24:43,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 932 transitions, 23247 flow [2025-03-17 14:24:45,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 932 transitions, 23049 flow, removed 91 selfloop flow, removed 5 redundant places. [2025-03-17 14:24:45,601 INFO L231 Difference]: Finished difference. Result has 365 places, 868 transitions, 21694 flow [2025-03-17 14:24:45,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=20304, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21694, PETRI_PLACES=365, PETRI_TRANSITIONS=868} [2025-03-17 14:24:45,602 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 329 predicate places. [2025-03-17 14:24:45,602 INFO L471 AbstractCegarLoop]: Abstraction has has 365 places, 868 transitions, 21694 flow [2025-03-17 14:24:45,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.708333333333334) internal successors, (305), 24 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:45,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:45,602 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:45,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-17 14:24:45,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-17 14:24:45,802 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:24:45,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash -441276978, now seen corresponding path program 10 times [2025-03-17 14:24:45,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:45,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410048836] [2025-03-17 14:24:45,803 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:24:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:45,808 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-17 14:24:45,816 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 14:24:45,816 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:24:45,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:46,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:46,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410048836] [2025-03-17 14:24:46,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410048836] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:46,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128179675] [2025-03-17 14:24:46,023 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:24:46,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:46,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:46,024 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:46,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 14:24:46,080 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-17 14:24:46,100 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 14:24:46,100 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:24:46,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:46,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-17 14:24:46,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:46,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:46,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:24:46,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2025-03-17 14:24:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:46,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128179675] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:46,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:46,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 24 [2025-03-17 14:24:46,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511937399] [2025-03-17 14:24:46,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:46,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:24:46,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:46,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:24:46,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2025-03-17 14:24:46,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:24:46,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 868 transitions, 21694 flow. Second operand has 24 states, 24 states have (on average 13.125) internal successors, (315), 24 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:46,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:46,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:24:46,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:49,359 INFO L124 PetriNetUnfolderBase]: 5260/9761 cut-off events. [2025-03-17 14:24:49,359 INFO L125 PetriNetUnfolderBase]: For 197634/197634 co-relation queries the response was YES. [2025-03-17 14:24:49,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73565 conditions, 9761 events. 5260/9761 cut-off events. For 197634/197634 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 72697 event pairs, 851 based on Foata normal form. 32/9793 useless extension candidates. Maximal degree in co-relation 73421. Up to 3603 conditions per place. [2025-03-17 14:24:49,466 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 440 selfloop transitions, 582 changer transitions 6/1029 dead transitions. [2025-03-17 14:24:49,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1029 transitions, 26660 flow [2025-03-17 14:24:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:24:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:24:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 281 transitions. [2025-03-17 14:24:49,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47466216216216217 [2025-03-17 14:24:49,467 INFO L175 Difference]: Start difference. First operand has 365 places, 868 transitions, 21694 flow. Second operand 16 states and 281 transitions. [2025-03-17 14:24:49,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1029 transitions, 26660 flow [2025-03-17 14:24:51,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1029 transitions, 26477 flow, removed 5 selfloop flow, removed 5 redundant places. [2025-03-17 14:24:51,793 INFO L231 Difference]: Finished difference. Result has 378 places, 919 transitions, 24558 flow [2025-03-17 14:24:51,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=21499, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24558, PETRI_PLACES=378, PETRI_TRANSITIONS=919} [2025-03-17 14:24:51,794 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 342 predicate places. [2025-03-17 14:24:51,794 INFO L471 AbstractCegarLoop]: Abstraction has has 378 places, 919 transitions, 24558 flow [2025-03-17 14:24:51,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.125) internal successors, (315), 24 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:51,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:51,795 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:51,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-17 14:24:51,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-03-17 14:24:51,996 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-17 14:24:51,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash -821610579, now seen corresponding path program 11 times [2025-03-17 14:24:51,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:51,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959333153] [2025-03-17 14:24:51,996 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:24:51,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:52,002 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 4 equivalence classes. [2025-03-17 14:24:52,010 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 14:24:52,011 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:24:52,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:24:52,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:52,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959333153] [2025-03-17 14:24:52,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959333153] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:52,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949401269] [2025-03-17 14:24:52,328 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:24:52,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:52,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:52,330 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:52,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-17 14:24:52,386 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 4 equivalence classes. [2025-03-17 14:24:52,411 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 14:24:52,411 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:24:52,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:52,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:24:52,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:52,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-03-17 14:24:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:52,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:52,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:24:52,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 55 [2025-03-17 14:24:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:24:52,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949401269] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:52,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:52,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2025-03-17 14:24:52,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667209179] [2025-03-17 14:24:52,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:52,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:24:52,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:52,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:24:52,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2025-03-17 14:24:52,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-03-17 14:24:52,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 919 transitions, 24558 flow. Second operand has 24 states, 24 states have (on average 12.791666666666666) internal successors, (307), 24 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:52,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:52,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-03-17 14:24:52,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:56,186 INFO L124 PetriNetUnfolderBase]: 5429/10027 cut-off events. [2025-03-17 14:24:56,187 INFO L125 PetriNetUnfolderBase]: For 228202/228202 co-relation queries the response was YES. [2025-03-17 14:24:56,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79177 conditions, 10027 events. 5429/10027 cut-off events. For 228202/228202 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 75005 event pairs, 1923 based on Foata normal form. 32/10059 useless extension candidates. Maximal degree in co-relation 79029. Up to 4128 conditions per place. [2025-03-17 14:24:56,288 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 575 selfloop transitions, 499 changer transitions 11/1086 dead transitions. [2025-03-17 14:24:56,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1086 transitions, 29396 flow [2025-03-17 14:24:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 14:24:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 14:24:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 401 transitions. [2025-03-17 14:24:56,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4712103407755582 [2025-03-17 14:24:56,289 INFO L175 Difference]: Start difference. First operand has 378 places, 919 transitions, 24558 flow. Second operand 23 states and 401 transitions. [2025-03-17 14:24:56,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1086 transitions, 29396 flow