./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:13:00,130 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:13:00,184 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:13:00,190 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:13:00,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:13:00,210 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:13:00,210 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:13:00,210 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:13:00,210 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:13:00,210 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:13:00,211 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:13:00,211 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:13:00,211 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:13:00,211 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:13:00,212 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:13:00,212 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:13:00,212 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:13:00,212 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-jdk21/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 -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2025-02-06 13:13:00,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:13:00,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:13:00,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:13:00,426 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:13:00,426 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:13:00,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-2.wvr.c [2025-02-06 13:13:01,644 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7268de2f6/41b6ab6238fe4017a35c16223d510c6f/FLAG723bb2a5f [2025-02-06 13:13:01,884 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:13:01,891 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2025-02-06 13:13:01,901 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7268de2f6/41b6ab6238fe4017a35c16223d510c6f/FLAG723bb2a5f [2025-02-06 13:13:02,222 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7268de2f6/41b6ab6238fe4017a35c16223d510c6f [2025-02-06 13:13:02,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:13:02,224 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:13:02,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:13:02,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:13:02,229 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:13:02,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,231 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4918102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02, skipping insertion in model container [2025-02-06 13:13:02,231 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,242 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:13:02,359 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:13:02,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:13:02,371 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:13:02,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:13:02,401 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:13:02,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02 WrapperNode [2025-02-06 13:13:02,401 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:13:02,402 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:13:02,402 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:13:02,403 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:13:02,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,424 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 120 [2025-02-06 13:13:02,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:13:02,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:13:02,427 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:13:02,427 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:13:02,433 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,438 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,451 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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]. [2025-02-06 13:13:02,453 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,453 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,459 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,460 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,464 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,465 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:13:02,466 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:13:02,466 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:13:02,466 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:13:02,467 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (1/1) ... [2025-02-06 13:13:02,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:13:02,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:02,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:13:02,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:13:02,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:13:02,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:13:02,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:13:02,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:13:02,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:13:02,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:13:02,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:13:02,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:13:02,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:13:02,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:13:02,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:13:02,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:13:02,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:13:02,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:13:02,526 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:13:02,586 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:13:02,587 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:13:02,756 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:13:02,756 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:13:02,925 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:13:02,925 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:13:02,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:13:02 BoogieIcfgContainer [2025-02-06 13:13:02,926 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:13:02,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:13:02,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:13:02,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:13:02,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:13:02" (1/3) ... [2025-02-06 13:13:02,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:13:02, skipping insertion in model container [2025-02-06 13:13:02,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:02" (2/3) ... [2025-02-06 13:13:02,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:13:02, skipping insertion in model container [2025-02-06 13:13:02,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:13:02" (3/3) ... [2025-02-06 13:13:02,936 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2025-02-06 13:13:02,946 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:13:02,947 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-2.wvr.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2025-02-06 13:13:02,947 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:13:02,999 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:13:03,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 34 transitions, 82 flow [2025-02-06 13:13:03,050 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2025-02-06 13:13:03,051 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:13:03,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 3/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2025-02-06 13:13:03,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 34 transitions, 82 flow [2025-02-06 13:13:03,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 31 transitions, 74 flow [2025-02-06 13:13:03,061 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:13:03,070 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;@2a866c99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:13:03,070 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-02-06 13:13:03,074 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:13:03,074 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:13:03,074 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:13:03,074 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:03,075 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:13:03,075 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:03,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:03,080 INFO L85 PathProgramCache]: Analyzing trace with hash 360053, now seen corresponding path program 1 times [2025-02-06 13:13:03,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:03,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721063021] [2025-02-06 13:13:03,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:03,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:03,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:13:03,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:13:03,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:03,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:03,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:03,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721063021] [2025-02-06 13:13:03,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721063021] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:03,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:03,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:13:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932682577] [2025-02-06 13:13:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:03,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:13:03,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:03,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:13:03,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:13:03,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-02-06 13:13:03,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 74 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) [2025-02-06 13:13:03,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:03,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-02-06 13:13:03,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:03,406 INFO L124 PetriNetUnfolderBase]: 75/171 cut-off events. [2025-02-06 13:13:03,407 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-06 13:13:03,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 171 events. 75/171 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 635 event pairs, 53 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 276. Up to 131 conditions per place. [2025-02-06 13:13:03,409 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 18 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2025-02-06 13:13:03,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 108 flow [2025-02-06 13:13:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:13:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:13:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2025-02-06 13:13:03,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2025-02-06 13:13:03,418 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 74 flow. Second operand 3 states and 55 transitions. [2025-02-06 13:13:03,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 108 flow [2025-02-06 13:13:03,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:03,447 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 64 flow [2025-02-06 13:13:03,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2025-02-06 13:13:03,451 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2025-02-06 13:13:03,451 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 64 flow [2025-02-06 13:13:03,452 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) [2025-02-06 13:13:03,452 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:03,452 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:13:03,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:13:03,452 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:03,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:03,453 INFO L85 PathProgramCache]: Analyzing trace with hash 360054, now seen corresponding path program 1 times [2025-02-06 13:13:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695153615] [2025-02-06 13:13:03,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:03,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:13:03,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:13:03,474 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:03,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:03,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:03,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695153615] [2025-02-06 13:13:03,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695153615] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:03,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:03,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:13:03,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317634506] [2025-02-06 13:13:03,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:03,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:13:03,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:03,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:13:03,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:13:03,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-02-06 13:13:03,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2025-02-06 13:13:03,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:03,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-02-06 13:13:03,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:03,835 INFO L124 PetriNetUnfolderBase]: 75/173 cut-off events. [2025-02-06 13:13:03,836 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:13:03,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 173 events. 75/173 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 638 event pairs, 53 based on Foata normal form. 1/134 useless extension candidates. Maximal degree in co-relation 300. Up to 135 conditions per place. [2025-02-06 13:13:03,837 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 21 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2025-02-06 13:13:03,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 114 flow [2025-02-06 13:13:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:13:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:13:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-02-06 13:13:03,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-02-06 13:13:03,841 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 64 flow. Second operand 3 states and 58 transitions. [2025-02-06 13:13:03,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 114 flow [2025-02-06 13:13:03,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:03,843 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 74 flow [2025-02-06 13:13:03,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-02-06 13:13:03,843 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2025-02-06 13:13:03,844 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 74 flow [2025-02-06 13:13:03,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2025-02-06 13:13:03,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:03,844 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:13:03,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:13:03,844 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:03,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash 346023105, now seen corresponding path program 1 times [2025-02-06 13:13:03,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:03,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499104437] [2025-02-06 13:13:03,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:03,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:03,857 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:13:03,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:13:03,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:03,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:04,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:04,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499104437] [2025-02-06 13:13:04,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499104437] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:04,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190990137] [2025-02-06 13:13:04,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:04,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:04,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:04,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:04,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:13:04,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:13:04,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:13:04,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:04,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:04,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:13:04,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:04,315 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 10 treesize of output 9 [2025-02-06 13:13:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:04,486 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:04,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190990137] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:04,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:04,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:13:04,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608170545] [2025-02-06 13:13:04,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:04,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:13:04,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:04,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:13:04,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:04,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-02-06 13:13:04,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 74 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 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) [2025-02-06 13:13:04,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:04,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-02-06 13:13:04,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:04,828 INFO L124 PetriNetUnfolderBase]: 75/172 cut-off events. [2025-02-06 13:13:04,828 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:13:04,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 172 events. 75/172 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 634 event pairs, 53 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 308. Up to 131 conditions per place. [2025-02-06 13:13:04,829 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 17 selfloop transitions, 5 changer transitions 0/29 dead transitions. [2025-02-06 13:13:04,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 116 flow [2025-02-06 13:13:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2025-02-06 13:13:04,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2025-02-06 13:13:04,831 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 74 flow. Second operand 5 states and 78 transitions. [2025-02-06 13:13:04,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 116 flow [2025-02-06 13:13:04,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:04,832 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 86 flow [2025-02-06 13:13:04,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2025-02-06 13:13:04,833 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2025-02-06 13:13:04,833 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 86 flow [2025-02-06 13:13:04,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 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) [2025-02-06 13:13:04,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:04,833 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:04,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:13:05,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:05,034 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:05,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:05,035 INFO L85 PathProgramCache]: Analyzing trace with hash 455275417, now seen corresponding path program 1 times [2025-02-06 13:13:05,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:05,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404149396] [2025-02-06 13:13:05,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:05,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:05,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:13:05,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:13:05,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:05,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:05,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:05,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404149396] [2025-02-06 13:13:05,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404149396] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:05,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:05,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:13:05,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931324496] [2025-02-06 13:13:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:05,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:13:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:05,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:13:05,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:13:05,110 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-06 13:13:05,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2025-02-06 13:13:05,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:05,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-06 13:13:05,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:05,164 INFO L124 PetriNetUnfolderBase]: 75/154 cut-off events. [2025-02-06 13:13:05,164 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-06 13:13:05,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 154 events. 75/154 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 469 event pairs, 53 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 282. Up to 130 conditions per place. [2025-02-06 13:13:05,166 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 20 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2025-02-06 13:13:05,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 124 flow [2025-02-06 13:13:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:13:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:13:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2025-02-06 13:13:05,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40441176470588236 [2025-02-06 13:13:05,168 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 86 flow. Second operand 4 states and 55 transitions. [2025-02-06 13:13:05,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 124 flow [2025-02-06 13:13:05,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 114 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-06 13:13:05,169 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 74 flow [2025-02-06 13:13:05,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2025-02-06 13:13:05,170 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2025-02-06 13:13:05,170 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 74 flow [2025-02-06 13:13:05,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2025-02-06 13:13:05,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:05,170 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:05,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:13:05,170 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:05,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash 455275418, now seen corresponding path program 1 times [2025-02-06 13:13:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:05,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647619938] [2025-02-06 13:13:05,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:05,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:13:05,186 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:13:05,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:05,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647619938] [2025-02-06 13:13:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647619938] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097989464] [2025-02-06 13:13:05,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:05,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:05,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:05,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:05,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:13:05,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:13:05,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:13:05,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:05,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:05,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:13:05,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:05,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:05,621 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 29 treesize of output 25 [2025-02-06 13:13:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:05,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097989464] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:05,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:05,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:13:05,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817698453] [2025-02-06 13:13:05,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:05,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:13:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:05,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:13:05,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:05,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-02-06 13:13:05,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 74 flow. Second operand has 11 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 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) [2025-02-06 13:13:05,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:05,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-02-06 13:13:05,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:05,869 INFO L124 PetriNetUnfolderBase]: 148/281 cut-off events. [2025-02-06 13:13:05,869 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:13:05,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 281 events. 148/281 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1052 event pairs, 53 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 541. Up to 141 conditions per place. [2025-02-06 13:13:05,871 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 34 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2025-02-06 13:13:05,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 179 flow [2025-02-06 13:13:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:13:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:13:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2025-02-06 13:13:05,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2025-02-06 13:13:05,875 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 74 flow. Second operand 4 states and 80 transitions. [2025-02-06 13:13:05,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 179 flow [2025-02-06 13:13:05,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:05,876 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 85 flow [2025-02-06 13:13:05,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=85, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2025-02-06 13:13:05,876 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2025-02-06 13:13:05,876 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 85 flow [2025-02-06 13:13:05,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 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) [2025-02-06 13:13:05,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:05,877 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:05,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:06,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:06,084 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:06,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:06,085 INFO L85 PathProgramCache]: Analyzing trace with hash -566975203, now seen corresponding path program 1 times [2025-02-06 13:13:06,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:06,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981361172] [2025-02-06 13:13:06,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:06,093 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:13:06,099 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:13:06,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:06,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:06,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981361172] [2025-02-06 13:13:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981361172] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033420995] [2025-02-06 13:13:06,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:06,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:06,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:06,278 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:06,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:13:06,316 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:13:06,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:13:06,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:06,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:06,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:13:06,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:06,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:06,494 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 36 treesize of output 32 [2025-02-06 13:13:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:06,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033420995] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:06,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:06,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-02-06 13:13:06,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257096410] [2025-02-06 13:13:06,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:06,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:13:06,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:06,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:13:06,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:13:06,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-02-06 13:13:06,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 85 flow. Second operand has 17 states, 17 states have (on average 12.764705882352942) internal successors, (217), 17 states have internal predecessors, (217), 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) [2025-02-06 13:13:06,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:06,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-02-06 13:13:06,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:07,196 INFO L124 PetriNetUnfolderBase]: 317/628 cut-off events. [2025-02-06 13:13:07,196 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2025-02-06 13:13:07,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 628 events. 317/628 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2996 event pairs, 162 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 682. Up to 261 conditions per place. [2025-02-06 13:13:07,199 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 60 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2025-02-06 13:13:07,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 74 transitions, 351 flow [2025-02-06 13:13:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:13:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:13:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2025-02-06 13:13:07,204 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5808823529411765 [2025-02-06 13:13:07,204 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 85 flow. Second operand 8 states and 158 transitions. [2025-02-06 13:13:07,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 74 transitions, 351 flow [2025-02-06 13:13:07,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 74 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:07,206 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 168 flow [2025-02-06 13:13:07,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2025-02-06 13:13:07,206 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2025-02-06 13:13:07,206 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 168 flow [2025-02-06 13:13:07,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.764705882352942) internal successors, (217), 17 states have internal predecessors, (217), 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) [2025-02-06 13:13:07,207 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:07,207 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:07,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:07,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:07,408 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:07,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash -590568522, now seen corresponding path program 1 times [2025-02-06 13:13:07,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:07,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596398776] [2025-02-06 13:13:07,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:07,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:07,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:13:07,433 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:13:07,433 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:07,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:07,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596398776] [2025-02-06 13:13:07,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596398776] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894713166] [2025-02-06 13:13:07,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:07,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:07,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:07,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:13:07,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:13:07,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:13:07,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:07,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:07,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:13:07,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:07,711 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 [2025-02-06 13:13:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:07,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:07,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894713166] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:07,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:13:07,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2025-02-06 13:13:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494050504] [2025-02-06 13:13:07,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:07,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:07,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:07,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:07,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:07,935 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2025-02-06 13:13:07,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2025-02-06 13:13:07,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:07,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2025-02-06 13:13:07,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:08,055 INFO L124 PetriNetUnfolderBase]: 491/881 cut-off events. [2025-02-06 13:13:08,056 INFO L125 PetriNetUnfolderBase]: For 498/522 co-relation queries the response was YES. [2025-02-06 13:13:08,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 881 events. 491/881 cut-off events. For 498/522 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3988 event pairs, 162 based on Foata normal form. 32/817 useless extension candidates. Maximal degree in co-relation 1463. Up to 509 conditions per place. [2025-02-06 13:13:08,061 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 42 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2025-02-06 13:13:08,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 314 flow [2025-02-06 13:13:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:13:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:13:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2025-02-06 13:13:08,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2025-02-06 13:13:08,062 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 168 flow. Second operand 4 states and 74 transitions. [2025-02-06 13:13:08,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 314 flow [2025-02-06 13:13:08,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:08,065 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 188 flow [2025-02-06 13:13:08,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2025-02-06 13:13:08,065 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2025-02-06 13:13:08,065 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 188 flow [2025-02-06 13:13:08,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2025-02-06 13:13:08,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:08,067 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:08,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:08,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-06 13:13:08,268 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:08,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:08,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1127754602, now seen corresponding path program 1 times [2025-02-06 13:13:08,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:08,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577549933] [2025-02-06 13:13:08,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:08,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:13:08,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:13:08,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:08,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:08,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:08,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577549933] [2025-02-06 13:13:08,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577549933] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:08,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543442720] [2025-02-06 13:13:08,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:08,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:08,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:08,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:08,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:13:08,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:13:08,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:13:08,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:08,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:08,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:13:08,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:08,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:08,743 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 29 treesize of output 25 [2025-02-06 13:13:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:08,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543442720] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:08,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:08,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-02-06 13:13:08,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295622075] [2025-02-06 13:13:08,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:08,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:13:08,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:08,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:13:08,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:13:09,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2025-02-06 13:13:09,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 188 flow. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 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) [2025-02-06 13:13:09,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:09,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2025-02-06 13:13:09,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:09,293 INFO L124 PetriNetUnfolderBase]: 514/913 cut-off events. [2025-02-06 13:13:09,293 INFO L125 PetriNetUnfolderBase]: For 588/622 co-relation queries the response was YES. [2025-02-06 13:13:09,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2426 conditions, 913 events. 514/913 cut-off events. For 588/622 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4102 event pairs, 269 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 1569. Up to 685 conditions per place. [2025-02-06 13:13:09,297 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 55 selfloop transitions, 9 changer transitions 0/66 dead transitions. [2025-02-06 13:13:09,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 408 flow [2025-02-06 13:13:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:13:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:13:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2025-02-06 13:13:09,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2025-02-06 13:13:09,299 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 188 flow. Second operand 7 states and 128 transitions. [2025-02-06 13:13:09,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 408 flow [2025-02-06 13:13:09,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 399 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:09,303 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 207 flow [2025-02-06 13:13:09,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=207, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2025-02-06 13:13:09,304 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2025-02-06 13:13:09,305 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 207 flow [2025-02-06 13:13:09,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 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) [2025-02-06 13:13:09,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:09,305 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:09,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:13:09,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:09,506 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:09,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:09,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1865655410, now seen corresponding path program 2 times [2025-02-06 13:13:09,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:09,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628304539] [2025-02-06 13:13:09,507 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:09,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:09,512 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-06 13:13:09,523 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 12 statements. [2025-02-06 13:13:09,523 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:09,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:09,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:09,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628304539] [2025-02-06 13:13:09,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628304539] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:09,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63825950] [2025-02-06 13:13:09,634 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:09,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:09,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:09,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:09,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:13:09,676 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-06 13:13:09,686 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 12 statements. [2025-02-06 13:13:09,686 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:09,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:09,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:13:09,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:09,700 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 [2025-02-06 13:13:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:09,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:09,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63825950] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:09,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:09,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:13:09,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796243991] [2025-02-06 13:13:09,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:09,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:13:09,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:09,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:13:09,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:10,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-02-06 13:13:10,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 207 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 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) [2025-02-06 13:13:10,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:10,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-02-06 13:13:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:10,286 INFO L124 PetriNetUnfolderBase]: 422/802 cut-off events. [2025-02-06 13:13:10,286 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2025-02-06 13:13:10,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2134 conditions, 802 events. 422/802 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3898 event pairs, 239 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 1416. Up to 553 conditions per place. [2025-02-06 13:13:10,289 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 34 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2025-02-06 13:13:10,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 332 flow [2025-02-06 13:13:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2025-02-06 13:13:10,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2025-02-06 13:13:10,290 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 207 flow. Second operand 5 states and 84 transitions. [2025-02-06 13:13:10,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 332 flow [2025-02-06 13:13:10,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 315 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:13:10,292 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 206 flow [2025-02-06 13:13:10,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2025-02-06 13:13:10,293 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2025-02-06 13:13:10,293 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 206 flow [2025-02-06 13:13:10,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 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) [2025-02-06 13:13:10,293 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:10,293 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:10,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:13:10,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-06 13:13:10,494 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:10,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1269350369, now seen corresponding path program 2 times [2025-02-06 13:13:10,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:10,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004002550] [2025-02-06 13:13:10,495 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:10,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:10,500 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:13:10,519 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 13 statements. [2025-02-06 13:13:10,519 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:10,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:10,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:10,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004002550] [2025-02-06 13:13:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004002550] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:10,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:10,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:13:10,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062316872] [2025-02-06 13:13:10,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:10,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:10,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:10,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:13:10,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2025-02-06 13:13:10,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2025-02-06 13:13:10,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:10,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2025-02-06 13:13:10,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:10,839 INFO L124 PetriNetUnfolderBase]: 468/832 cut-off events. [2025-02-06 13:13:10,839 INFO L125 PetriNetUnfolderBase]: For 985/985 co-relation queries the response was YES. [2025-02-06 13:13:10,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2405 conditions, 832 events. 468/832 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3649 event pairs, 322 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 1543. Up to 684 conditions per place. [2025-02-06 13:13:10,844 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 36 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2025-02-06 13:13:10,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 349 flow [2025-02-06 13:13:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2025-02-06 13:13:10,845 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2025-02-06 13:13:10,845 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 206 flow. Second operand 5 states and 78 transitions. [2025-02-06 13:13:10,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 349 flow [2025-02-06 13:13:10,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 317 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:10,848 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 198 flow [2025-02-06 13:13:10,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2025-02-06 13:13:10,848 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2025-02-06 13:13:10,848 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 198 flow [2025-02-06 13:13:10,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2025-02-06 13:13:10,848 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:10,848 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:10,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:13:10,850 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:10,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1440401447, now seen corresponding path program 1 times [2025-02-06 13:13:10,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:10,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512257745] [2025-02-06 13:13:10,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:10,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:10,855 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:13:10,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:13:10,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:10,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:10,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:10,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512257745] [2025-02-06 13:13:10,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512257745] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:10,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185236988] [2025-02-06 13:13:10,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:10,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:10,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:10,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:10,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:13:11,015 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:13:11,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:13:11,026 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:11,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:11,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:13:11,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:11,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:11,178 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 36 treesize of output 32 [2025-02-06 13:13:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:11,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185236988] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:11,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:11,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-02-06 13:13:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834974683] [2025-02-06 13:13:11,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:11,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:13:11,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:11,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:13:11,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:13:11,530 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2025-02-06 13:13:11,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 198 flow. Second operand has 17 states, 17 states have (on average 12.294117647058824) internal successors, (209), 17 states have internal predecessors, (209), 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) [2025-02-06 13:13:11,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:11,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2025-02-06 13:13:11,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:11,768 INFO L124 PetriNetUnfolderBase]: 445/793 cut-off events. [2025-02-06 13:13:11,768 INFO L125 PetriNetUnfolderBase]: For 657/657 co-relation queries the response was YES. [2025-02-06 13:13:11,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 793 events. 445/793 cut-off events. For 657/657 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3380 event pairs, 243 based on Foata normal form. 16/745 useless extension candidates. Maximal degree in co-relation 1506. Up to 392 conditions per place. [2025-02-06 13:13:11,772 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 63 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2025-02-06 13:13:11,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 471 flow [2025-02-06 13:13:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:13:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:13:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2025-02-06 13:13:11,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5404411764705882 [2025-02-06 13:13:11,773 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 198 flow. Second operand 8 states and 147 transitions. [2025-02-06 13:13:11,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 471 flow [2025-02-06 13:13:11,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 449 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:11,776 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 224 flow [2025-02-06 13:13:11,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=224, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2025-02-06 13:13:11,777 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2025-02-06 13:13:11,777 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 224 flow [2025-02-06 13:13:11,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.294117647058824) internal successors, (209), 17 states have internal predecessors, (209), 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) [2025-02-06 13:13:11,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:11,777 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:11,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 13:13:11,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:11,982 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:11,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:11,983 INFO L85 PathProgramCache]: Analyzing trace with hash 75005028, now seen corresponding path program 2 times [2025-02-06 13:13:11,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:11,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769286045] [2025-02-06 13:13:11,983 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:11,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:11,998 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-06 13:13:12,002 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 15 statements. [2025-02-06 13:13:12,002 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:12,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:12,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:12,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769286045] [2025-02-06 13:13:12,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769286045] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:12,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209592385] [2025-02-06 13:13:12,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:12,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:12,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:12,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:12,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:13:12,174 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-06 13:13:12,186 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 15 statements. [2025-02-06 13:13:12,186 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:12,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:12,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:13:12,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:12,200 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 10 treesize of output 9 [2025-02-06 13:13:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:12,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:12,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209592385] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:12,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:12,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:13:12,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672300650] [2025-02-06 13:13:12,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:12,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:13:12,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:12,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:13:12,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:12,640 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2025-02-06 13:13:12,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 224 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 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) [2025-02-06 13:13:12,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:12,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2025-02-06 13:13:12,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:12,793 INFO L124 PetriNetUnfolderBase]: 422/754 cut-off events. [2025-02-06 13:13:12,793 INFO L125 PetriNetUnfolderBase]: For 818/818 co-relation queries the response was YES. [2025-02-06 13:13:12,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 754 events. 422/754 cut-off events. For 818/818 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3255 event pairs, 200 based on Foata normal form. 16/770 useless extension candidates. Maximal degree in co-relation 1445. Up to 450 conditions per place. [2025-02-06 13:13:12,797 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 38 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2025-02-06 13:13:12,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 370 flow [2025-02-06 13:13:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2025-02-06 13:13:12,798 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45294117647058824 [2025-02-06 13:13:12,798 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 224 flow. Second operand 5 states and 77 transitions. [2025-02-06 13:13:12,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 370 flow [2025-02-06 13:13:12,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 353 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-06 13:13:12,800 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 218 flow [2025-02-06 13:13:12,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2025-02-06 13:13:12,801 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2025-02-06 13:13:12,801 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 218 flow [2025-02-06 13:13:12,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 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) [2025-02-06 13:13:12,801 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:12,801 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:12,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:13,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:13,007 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:13,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash -578198292, now seen corresponding path program 1 times [2025-02-06 13:13:13,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:13,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609867773] [2025-02-06 13:13:13,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:13,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:13,013 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:13:13,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:13:13,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:13,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:13,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:13,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609867773] [2025-02-06 13:13:13,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609867773] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:13,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:13,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:13:13,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082374422] [2025-02-06 13:13:13,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:13,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:13:13,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:13,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:13:13,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:13:13,042 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:13,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2025-02-06 13:13:13,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:13,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:13,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:13,126 INFO L124 PetriNetUnfolderBase]: 422/750 cut-off events. [2025-02-06 13:13:13,126 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2025-02-06 13:13:13,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2290 conditions, 750 events. 422/750 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3197 event pairs, 129 based on Foata normal form. 2/752 useless extension candidates. Maximal degree in co-relation 1497. Up to 562 conditions per place. [2025-02-06 13:13:13,132 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 42 selfloop transitions, 5 changer transitions 1/49 dead transitions. [2025-02-06 13:13:13,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 357 flow [2025-02-06 13:13:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:13:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:13:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2025-02-06 13:13:13,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2025-02-06 13:13:13,133 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 218 flow. Second operand 3 states and 70 transitions. [2025-02-06 13:13:13,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 357 flow [2025-02-06 13:13:13,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 339 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:13,136 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 235 flow [2025-02-06 13:13:13,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2025-02-06 13:13:13,136 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2025-02-06 13:13:13,136 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 235 flow [2025-02-06 13:13:13,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2025-02-06 13:13:13,136 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:13,136 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:13,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-06 13:13:13,137 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:13,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 455285129, now seen corresponding path program 1 times [2025-02-06 13:13:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:13,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450919668] [2025-02-06 13:13:13,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:13,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:13,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:13:13,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:13,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:13,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:13,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:13,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450919668] [2025-02-06 13:13:13,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450919668] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:13,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:13,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:13:13,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184322634] [2025-02-06 13:13:13,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:13,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:13,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:13,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:13,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:13:13,231 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:13,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2025-02-06 13:13:13,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:13,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:13,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:13,351 INFO L124 PetriNetUnfolderBase]: 489/886 cut-off events. [2025-02-06 13:13:13,352 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2025-02-06 13:13:13,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2760 conditions, 886 events. 489/886 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4326 event pairs, 165 based on Foata normal form. 26/912 useless extension candidates. Maximal degree in co-relation 1756. Up to 434 conditions per place. [2025-02-06 13:13:13,356 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 65 selfloop transitions, 13 changer transitions 0/79 dead transitions. [2025-02-06 13:13:13,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 613 flow [2025-02-06 13:13:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:13,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2025-02-06 13:13:13,358 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2025-02-06 13:13:13,358 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 235 flow. Second operand 5 states and 112 transitions. [2025-02-06 13:13:13,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 613 flow [2025-02-06 13:13:13,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 598 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:13,361 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 349 flow [2025-02-06 13:13:13,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2025-02-06 13:13:13,361 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2025-02-06 13:13:13,361 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 349 flow [2025-02-06 13:13:13,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2025-02-06 13:13:13,361 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:13,361 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:13,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:13:13,362 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:13,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1664142683, now seen corresponding path program 2 times [2025-02-06 13:13:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:13,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765018509] [2025-02-06 13:13:13,362 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:13,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:13,367 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:13,374 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:13,375 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:13,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:13,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765018509] [2025-02-06 13:13:13,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765018509] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813434611] [2025-02-06 13:13:13,504 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:13,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:13,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:13,506 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:13,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:13:13,542 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:13,556 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:13,556 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:13,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:13,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:13:13,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:13,579 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:13,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813434611] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:13,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:13:13,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 9 [2025-02-06 13:13:13,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474889629] [2025-02-06 13:13:13,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:13,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:13:13,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:13,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:13:13,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:13:13,607 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:13,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2025-02-06 13:13:13,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:13,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:13,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:13,735 INFO L124 PetriNetUnfolderBase]: 509/920 cut-off events. [2025-02-06 13:13:13,735 INFO L125 PetriNetUnfolderBase]: For 1902/1902 co-relation queries the response was YES. [2025-02-06 13:13:13,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3373 conditions, 920 events. 509/920 cut-off events. For 1902/1902 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4305 event pairs, 86 based on Foata normal form. 14/934 useless extension candidates. Maximal degree in co-relation 2217. Up to 549 conditions per place. [2025-02-06 13:13:13,740 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 55 selfloop transitions, 15 changer transitions 1/72 dead transitions. [2025-02-06 13:13:13,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 647 flow [2025-02-06 13:13:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:13:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:13:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2025-02-06 13:13:13,741 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6397058823529411 [2025-02-06 13:13:13,741 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 349 flow. Second operand 4 states and 87 transitions. [2025-02-06 13:13:13,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 647 flow [2025-02-06 13:13:13,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 616 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:13,745 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 430 flow [2025-02-06 13:13:13,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2025-02-06 13:13:13,746 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 25 predicate places. [2025-02-06 13:13:13,746 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 430 flow [2025-02-06 13:13:13,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2025-02-06 13:13:13,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:13,746 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:13,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 13:13:13,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:13,947 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:13,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:13,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1946512041, now seen corresponding path program 3 times [2025-02-06 13:13:13,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:13,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331896241] [2025-02-06 13:13:13,947 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:13:13,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:13,957 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:13,967 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:13,967 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:13:13,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:14,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:14,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331896241] [2025-02-06 13:13:14,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331896241] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:14,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:14,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:13:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344274433] [2025-02-06 13:13:14,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:14,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:13:14,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:14,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:13:14,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:13:14,008 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:14,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2025-02-06 13:13:14,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:14,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:14,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:14,107 INFO L124 PetriNetUnfolderBase]: 501/912 cut-off events. [2025-02-06 13:13:14,108 INFO L125 PetriNetUnfolderBase]: For 2712/2712 co-relation queries the response was YES. [2025-02-06 13:13:14,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 912 events. 501/912 cut-off events. For 2712/2712 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4303 event pairs, 196 based on Foata normal form. 8/920 useless extension candidates. Maximal degree in co-relation 2501. Up to 613 conditions per place. [2025-02-06 13:13:14,112 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 64 selfloop transitions, 9 changer transitions 1/75 dead transitions. [2025-02-06 13:13:14,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 733 flow [2025-02-06 13:13:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:13:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:13:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2025-02-06 13:13:14,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-06 13:13:14,113 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 430 flow. Second operand 4 states and 85 transitions. [2025-02-06 13:13:14,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 733 flow [2025-02-06 13:13:14,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 723 flow, removed 5 selfloop flow, removed 0 redundant places. [2025-02-06 13:13:14,119 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 462 flow [2025-02-06 13:13:14,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=462, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2025-02-06 13:13:14,119 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 30 predicate places. [2025-02-06 13:13:14,119 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 462 flow [2025-02-06 13:13:14,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2025-02-06 13:13:14,120 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:14,120 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:14,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-06 13:13:14,120 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:14,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:14,120 INFO L85 PathProgramCache]: Analyzing trace with hash 92581717, now seen corresponding path program 4 times [2025-02-06 13:13:14,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:14,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550715110] [2025-02-06 13:13:14,120 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:13:14,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:14,124 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:14,129 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:14,130 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:13:14,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:14,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:14,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550715110] [2025-02-06 13:13:14,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550715110] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:14,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494105818] [2025-02-06 13:13:14,228 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:13:14,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:14,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:14,230 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:14,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:13:14,265 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:14,277 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:14,277 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:13:14,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:14,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:13:14,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:14,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:14,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494105818] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:14,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:14,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 10 [2025-02-06 13:13:14,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664208788] [2025-02-06 13:13:14,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:14,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:13:14,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:14,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:13:14,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:13:14,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:14,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 462 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 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) [2025-02-06 13:13:14,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:14,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:14,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:14,824 INFO L124 PetriNetUnfolderBase]: 773/1384 cut-off events. [2025-02-06 13:13:14,824 INFO L125 PetriNetUnfolderBase]: For 4934/4934 co-relation queries the response was YES. [2025-02-06 13:13:14,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6030 conditions, 1384 events. 773/1384 cut-off events. For 4934/4934 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7398 event pairs, 106 based on Foata normal form. 40/1424 useless extension candidates. Maximal degree in co-relation 4098. Up to 374 conditions per place. [2025-02-06 13:13:14,839 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 90 selfloop transitions, 70 changer transitions 3/164 dead transitions. [2025-02-06 13:13:14,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 164 transitions, 1562 flow [2025-02-06 13:13:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 13:13:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 13:13:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 261 transitions. [2025-02-06 13:13:14,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5904977375565611 [2025-02-06 13:13:14,841 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 462 flow. Second operand 13 states and 261 transitions. [2025-02-06 13:13:14,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 164 transitions, 1562 flow [2025-02-06 13:13:14,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 164 transitions, 1532 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:14,848 INFO L231 Difference]: Finished difference. Result has 86 places, 103 transitions, 1224 flow [2025-02-06 13:13:14,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1224, PETRI_PLACES=86, PETRI_TRANSITIONS=103} [2025-02-06 13:13:14,849 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 51 predicate places. [2025-02-06 13:13:14,849 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 103 transitions, 1224 flow [2025-02-06 13:13:14,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 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) [2025-02-06 13:13:14,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:14,849 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:14,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 13:13:15,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 13:13:15,050 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:15,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:15,050 INFO L85 PathProgramCache]: Analyzing trace with hash -802371055, now seen corresponding path program 5 times [2025-02-06 13:13:15,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:15,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778084555] [2025-02-06 13:13:15,050 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:13:15,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:15,055 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:15,063 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:15,063 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:15,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:15,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:15,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778084555] [2025-02-06 13:13:15,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778084555] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:15,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:15,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:13:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002751533] [2025-02-06 13:13:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:15,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:15,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:15,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:13:15,149 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:15,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 103 transitions, 1224 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2025-02-06 13:13:15,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:15,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:15,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:15,332 INFO L124 PetriNetUnfolderBase]: 767/1374 cut-off events. [2025-02-06 13:13:15,333 INFO L125 PetriNetUnfolderBase]: For 9311/9311 co-relation queries the response was YES. [2025-02-06 13:13:15,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7816 conditions, 1374 events. 767/1374 cut-off events. For 9311/9311 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7254 event pairs, 201 based on Foata normal form. 4/1378 useless extension candidates. Maximal degree in co-relation 6595. Up to 747 conditions per place. [2025-02-06 13:13:15,343 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 101 selfloop transitions, 27 changer transitions 2/131 dead transitions. [2025-02-06 13:13:15,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1757 flow [2025-02-06 13:13:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2025-02-06 13:13:15,345 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2025-02-06 13:13:15,345 INFO L175 Difference]: Start difference. First operand has 86 places, 103 transitions, 1224 flow. Second operand 5 states and 106 transitions. [2025-02-06 13:13:15,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1757 flow [2025-02-06 13:13:15,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 131 transitions, 1713 flow, removed 22 selfloop flow, removed 0 redundant places. [2025-02-06 13:13:15,363 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 1360 flow [2025-02-06 13:13:15,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1360, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2025-02-06 13:13:15,364 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 57 predicate places. [2025-02-06 13:13:15,365 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 1360 flow [2025-02-06 13:13:15,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2025-02-06 13:13:15,365 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:15,365 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:15,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-06 13:13:15,365 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:15,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1774847181, now seen corresponding path program 6 times [2025-02-06 13:13:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:15,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212964650] [2025-02-06 13:13:15,366 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:13:15,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:15,371 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:15,378 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:15,379 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 13:13:15,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:15,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:15,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212964650] [2025-02-06 13:13:15,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212964650] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:15,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:15,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:13:15,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254153228] [2025-02-06 13:13:15,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:15,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:13:15,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:15,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:13:15,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:13:15,413 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:15,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 1360 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2025-02-06 13:13:15,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:15,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:15,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:15,553 INFO L124 PetriNetUnfolderBase]: 765/1362 cut-off events. [2025-02-06 13:13:15,553 INFO L125 PetriNetUnfolderBase]: For 9994/9994 co-relation queries the response was YES. [2025-02-06 13:13:15,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7877 conditions, 1362 events. 765/1362 cut-off events. For 9994/9994 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7090 event pairs, 205 based on Foata normal form. 14/1376 useless extension candidates. Maximal degree in co-relation 6827. Up to 747 conditions per place. [2025-02-06 13:13:15,565 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 92 selfloop transitions, 33 changer transitions 2/128 dead transitions. [2025-02-06 13:13:15,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 128 transitions, 1783 flow [2025-02-06 13:13:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:13:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:13:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2025-02-06 13:13:15,567 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2025-02-06 13:13:15,567 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 1360 flow. Second operand 4 states and 86 transitions. [2025-02-06 13:13:15,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 128 transitions, 1783 flow [2025-02-06 13:13:15,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1755 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:15,590 INFO L231 Difference]: Finished difference. Result has 95 places, 111 transitions, 1443 flow [2025-02-06 13:13:15,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1443, PETRI_PLACES=95, PETRI_TRANSITIONS=111} [2025-02-06 13:13:15,590 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 60 predicate places. [2025-02-06 13:13:15,590 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 111 transitions, 1443 flow [2025-02-06 13:13:15,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2025-02-06 13:13:15,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:15,590 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:15,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-06 13:13:15,590 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:15,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash -591132425, now seen corresponding path program 1 times [2025-02-06 13:13:15,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:15,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28020426] [2025-02-06 13:13:15,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:15,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:15,595 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:13:15,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:13:15,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:15,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:15,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28020426] [2025-02-06 13:13:15,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28020426] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:15,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608484073] [2025-02-06 13:13:15,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:15,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:15,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:15,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:15,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 13:13:15,842 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:13:15,855 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:13:15,855 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:15,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:15,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:13:15,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:15,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:15,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608484073] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:15,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:13:15,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 11 [2025-02-06 13:13:15,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314170685] [2025-02-06 13:13:15,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:15,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:13:15,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:15,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:13:15,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:15,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:15,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 111 transitions, 1443 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:15,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:15,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:15,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:16,037 INFO L124 PetriNetUnfolderBase]: 735/1293 cut-off events. [2025-02-06 13:13:16,038 INFO L125 PetriNetUnfolderBase]: For 10333/10333 co-relation queries the response was YES. [2025-02-06 13:13:16,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7834 conditions, 1293 events. 735/1293 cut-off events. For 10333/10333 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6554 event pairs, 71 based on Foata normal form. 14/1307 useless extension candidates. Maximal degree in co-relation 7093. Up to 747 conditions per place. [2025-02-06 13:13:16,046 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 108 selfloop transitions, 43 changer transitions 0/152 dead transitions. [2025-02-06 13:13:16,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 152 transitions, 2211 flow [2025-02-06 13:13:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:13:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:13:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2025-02-06 13:13:16,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6397058823529411 [2025-02-06 13:13:16,047 INFO L175 Difference]: Start difference. First operand has 95 places, 111 transitions, 1443 flow. Second operand 4 states and 87 transitions. [2025-02-06 13:13:16,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 152 transitions, 2211 flow [2025-02-06 13:13:16,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 2124 flow, removed 8 selfloop flow, removed 5 redundant places. [2025-02-06 13:13:16,071 INFO L231 Difference]: Finished difference. Result has 94 places, 113 transitions, 1571 flow [2025-02-06 13:13:16,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1571, PETRI_PLACES=94, PETRI_TRANSITIONS=113} [2025-02-06 13:13:16,071 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 59 predicate places. [2025-02-06 13:13:16,071 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 113 transitions, 1571 flow [2025-02-06 13:13:16,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:16,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:16,072 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:16,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:16,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:16,276 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:16,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash 929522577, now seen corresponding path program 2 times [2025-02-06 13:13:16,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:16,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224549074] [2025-02-06 13:13:16,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:16,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:16,281 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 13:13:16,286 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:13:16,286 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:16,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:16,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:16,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224549074] [2025-02-06 13:13:16,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224549074] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:16,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:16,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:13:16,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024840105] [2025-02-06 13:13:16,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:16,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:16,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:16,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:16,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:13:16,332 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:16,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 113 transitions, 1571 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2025-02-06 13:13:16,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:16,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:16,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:16,532 INFO L124 PetriNetUnfolderBase]: 691/1204 cut-off events. [2025-02-06 13:13:16,532 INFO L125 PetriNetUnfolderBase]: For 11178/11178 co-relation queries the response was YES. [2025-02-06 13:13:16,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7719 conditions, 1204 events. 691/1204 cut-off events. For 11178/11178 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5895 event pairs, 224 based on Foata normal form. 18/1222 useless extension candidates. Maximal degree in co-relation 5589. Up to 840 conditions per place. [2025-02-06 13:13:16,540 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 96 selfloop transitions, 23 changer transitions 8/128 dead transitions. [2025-02-06 13:13:16,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1915 flow [2025-02-06 13:13:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2025-02-06 13:13:16,543 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2025-02-06 13:13:16,543 INFO L175 Difference]: Start difference. First operand has 94 places, 113 transitions, 1571 flow. Second operand 5 states and 100 transitions. [2025-02-06 13:13:16,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1915 flow [2025-02-06 13:13:16,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 128 transitions, 1866 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:16,564 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 1602 flow [2025-02-06 13:13:16,564 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1602, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2025-02-06 13:13:16,564 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 64 predicate places. [2025-02-06 13:13:16,564 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 1602 flow [2025-02-06 13:13:16,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2025-02-06 13:13:16,565 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:16,565 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:16,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-06 13:13:16,566 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:16,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:16,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1744638660, now seen corresponding path program 1 times [2025-02-06 13:13:16,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:16,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337453879] [2025-02-06 13:13:16,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:16,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:16,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:13:16,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:13:16,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:16,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:16,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:16,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337453879] [2025-02-06 13:13:16,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337453879] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:16,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959765380] [2025-02-06 13:13:16,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:16,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:16,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:16,703 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:16,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 13:13:16,738 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:13:16,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:13:16,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:16,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:16,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-06 13:13:16,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:16,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-02-06 13:13:16,845 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 15 treesize of output 7 [2025-02-06 13:13:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:16,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:17,068 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 33 treesize of output 29 [2025-02-06 13:13:17,078 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 13:13:17,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 41 [2025-02-06 13:13:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:17,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959765380] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:17,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:17,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-02-06 13:13:17,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585015301] [2025-02-06 13:13:17,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:17,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:13:17,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:17,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:13:17,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:13:17,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:17,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 1602 flow. Second operand has 20 states, 20 states have (on average 14.85) internal successors, (297), 20 states have internal predecessors, (297), 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) [2025-02-06 13:13:17,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:17,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:17,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:19,021 INFO L124 PetriNetUnfolderBase]: 1084/1893 cut-off events. [2025-02-06 13:13:19,022 INFO L125 PetriNetUnfolderBase]: For 15769/15769 co-relation queries the response was YES. [2025-02-06 13:13:19,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11833 conditions, 1893 events. 1084/1893 cut-off events. For 15769/15769 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10070 event pairs, 52 based on Foata normal form. 9/1902 useless extension candidates. Maximal degree in co-relation 11390. Up to 409 conditions per place. [2025-02-06 13:13:19,030 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 142 selfloop transitions, 94 changer transitions 192/429 dead transitions. [2025-02-06 13:13:19,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 429 transitions, 5469 flow [2025-02-06 13:13:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-02-06 13:13:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-02-06 13:13:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 795 transitions. [2025-02-06 13:13:19,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5437756497948016 [2025-02-06 13:13:19,034 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 1602 flow. Second operand 43 states and 795 transitions. [2025-02-06 13:13:19,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 429 transitions, 5469 flow [2025-02-06 13:13:19,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 429 transitions, 5347 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-02-06 13:13:19,059 INFO L231 Difference]: Finished difference. Result has 153 places, 142 transitions, 2097 flow [2025-02-06 13:13:19,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=2097, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2025-02-06 13:13:19,059 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 118 predicate places. [2025-02-06 13:13:19,059 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 2097 flow [2025-02-06 13:13:19,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.85) internal successors, (297), 20 states have internal predecessors, (297), 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) [2025-02-06 13:13:19,060 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:19,060 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:19,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:19,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:19,260 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:19,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2051747473, now seen corresponding path program 2 times [2025-02-06 13:13:19,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:19,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940945564] [2025-02-06 13:13:19,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:19,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:19,265 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:13:19,275 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:13:19,277 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:19,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:19,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:19,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940945564] [2025-02-06 13:13:19,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940945564] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:19,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527864366] [2025-02-06 13:13:19,384 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:19,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:19,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:19,387 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:19,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 13:13:19,426 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:13:19,523 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:13:19,523 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:19,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:19,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:13:19,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:19,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:19,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527864366] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:19,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:19,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2025-02-06 13:13:19,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002503912] [2025-02-06 13:13:19,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:19,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:13:19,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:19,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:13:19,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:13:19,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:19,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 2097 flow. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 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) [2025-02-06 13:13:19,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:19,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:19,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:19,933 INFO L124 PetriNetUnfolderBase]: 530/916 cut-off events. [2025-02-06 13:13:19,933 INFO L125 PetriNetUnfolderBase]: For 13271/13271 co-relation queries the response was YES. [2025-02-06 13:13:19,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6936 conditions, 916 events. 530/916 cut-off events. For 13271/13271 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3941 event pairs, 104 based on Foata normal form. 34/950 useless extension candidates. Maximal degree in co-relation 6882. Up to 371 conditions per place. [2025-02-06 13:13:19,941 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 119 selfloop transitions, 56 changer transitions 0/176 dead transitions. [2025-02-06 13:13:19,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 176 transitions, 2731 flow [2025-02-06 13:13:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:13:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:13:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2025-02-06 13:13:19,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5775401069518716 [2025-02-06 13:13:19,942 INFO L175 Difference]: Start difference. First operand has 153 places, 142 transitions, 2097 flow. Second operand 11 states and 216 transitions. [2025-02-06 13:13:19,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 176 transitions, 2731 flow [2025-02-06 13:13:19,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 176 transitions, 2381 flow, removed 140 selfloop flow, removed 25 redundant places. [2025-02-06 13:13:19,985 INFO L231 Difference]: Finished difference. Result has 107 places, 127 transitions, 1733 flow [2025-02-06 13:13:19,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1733, PETRI_PLACES=107, PETRI_TRANSITIONS=127} [2025-02-06 13:13:19,986 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 72 predicate places. [2025-02-06 13:13:19,986 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 127 transitions, 1733 flow [2025-02-06 13:13:19,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 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) [2025-02-06 13:13:19,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:19,986 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:19,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 13:13:20,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:20,187 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:20,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1001160940, now seen corresponding path program 3 times [2025-02-06 13:13:20,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:20,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072076826] [2025-02-06 13:13:20,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:13:20,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:20,193 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-02-06 13:13:20,211 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:13:20,211 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:13:20,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:20,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:20,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072076826] [2025-02-06 13:13:20,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072076826] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:20,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367371767] [2025-02-06 13:13:20,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:13:20,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:20,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:20,381 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:20,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 13:13:20,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-02-06 13:13:20,465 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:13:20,466 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:13:20,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:20,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 13:13:20,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:20,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:13:20,579 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2025-02-06 13:13:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:20,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:20,653 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-02-06 13:13:20,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-02-06 13:13:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:20,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367371767] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:20,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:20,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5] total 12 [2025-02-06 13:13:20,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055517987] [2025-02-06 13:13:20,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:20,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:13:20,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:20,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:13:20,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:13:20,843 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:20,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 1733 flow. Second operand has 13 states, 13 states have (on average 15.538461538461538) internal successors, (202), 13 states have internal predecessors, (202), 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) [2025-02-06 13:13:20,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:20,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:20,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:21,155 INFO L124 PetriNetUnfolderBase]: 820/1424 cut-off events. [2025-02-06 13:13:21,155 INFO L125 PetriNetUnfolderBase]: For 13300/13300 co-relation queries the response was YES. [2025-02-06 13:13:21,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9512 conditions, 1424 events. 820/1424 cut-off events. For 13300/13300 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6759 event pairs, 55 based on Foata normal form. 1/1425 useless extension candidates. Maximal degree in co-relation 9476. Up to 621 conditions per place. [2025-02-06 13:13:21,162 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 147 selfloop transitions, 82 changer transitions 1/231 dead transitions. [2025-02-06 13:13:21,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 231 transitions, 3396 flow [2025-02-06 13:13:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:13:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:13:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2025-02-06 13:13:21,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2025-02-06 13:13:21,163 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 1733 flow. Second operand 11 states and 220 transitions. [2025-02-06 13:13:21,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 231 transitions, 3396 flow [2025-02-06 13:13:21,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 231 transitions, 3277 flow, removed 1 selfloop flow, removed 7 redundant places. [2025-02-06 13:13:21,181 INFO L231 Difference]: Finished difference. Result has 113 places, 168 transitions, 2464 flow [2025-02-06 13:13:21,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2464, PETRI_PLACES=113, PETRI_TRANSITIONS=168} [2025-02-06 13:13:21,182 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 78 predicate places. [2025-02-06 13:13:21,182 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 168 transitions, 2464 flow [2025-02-06 13:13:21,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.538461538461538) internal successors, (202), 13 states have internal predecessors, (202), 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) [2025-02-06 13:13:21,182 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:21,182 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:21,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:21,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-06 13:13:21,387 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:21,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:21,387 INFO L85 PathProgramCache]: Analyzing trace with hash 865552402, now seen corresponding path program 4 times [2025-02-06 13:13:21,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:21,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123450777] [2025-02-06 13:13:21,388 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:13:21,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:21,392 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-06 13:13:21,404 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:13:21,408 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:13:21,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:21,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:21,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123450777] [2025-02-06 13:13:21,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123450777] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:21,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480293301] [2025-02-06 13:13:21,560 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:13:21,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:21,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:21,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:21,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 13:13:21,598 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-06 13:13:21,617 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:13:21,617 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:13:21,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:21,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 13:13:21,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:21,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:13:21,703 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2025-02-06 13:13:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:21,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:21,770 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-02-06 13:13:21,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-02-06 13:13:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:21,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480293301] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:21,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:21,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 14 [2025-02-06 13:13:21,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992959723] [2025-02-06 13:13:21,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:21,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:13:21,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:21,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:13:21,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:13:21,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:21,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 168 transitions, 2464 flow. Second operand has 15 states, 15 states have (on average 16.0) internal successors, (240), 15 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) [2025-02-06 13:13:21,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:21,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:21,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:22,381 INFO L124 PetriNetUnfolderBase]: 1010/1757 cut-off events. [2025-02-06 13:13:22,381 INFO L125 PetriNetUnfolderBase]: For 17077/17077 co-relation queries the response was YES. [2025-02-06 13:13:22,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11947 conditions, 1757 events. 1010/1757 cut-off events. For 17077/17077 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8869 event pairs, 114 based on Foata normal form. 1/1758 useless extension candidates. Maximal degree in co-relation 11908. Up to 1090 conditions per place. [2025-02-06 13:13:22,393 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 172 selfloop transitions, 72 changer transitions 1/246 dead transitions. [2025-02-06 13:13:22,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 246 transitions, 3806 flow [2025-02-06 13:13:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:13:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:13:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2025-02-06 13:13:22,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5748663101604278 [2025-02-06 13:13:22,394 INFO L175 Difference]: Start difference. First operand has 113 places, 168 transitions, 2464 flow. Second operand 11 states and 215 transitions. [2025-02-06 13:13:22,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 246 transitions, 3806 flow [2025-02-06 13:13:22,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 246 transitions, 3758 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-02-06 13:13:22,421 INFO L231 Difference]: Finished difference. Result has 123 places, 196 transitions, 3039 flow [2025-02-06 13:13:22,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3039, PETRI_PLACES=123, PETRI_TRANSITIONS=196} [2025-02-06 13:13:22,421 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 88 predicate places. [2025-02-06 13:13:22,421 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 196 transitions, 3039 flow [2025-02-06 13:13:22,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.0) internal successors, (240), 15 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) [2025-02-06 13:13:22,422 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:22,422 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:22,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:22,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-06 13:13:22,626 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:22,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:22,626 INFO L85 PathProgramCache]: Analyzing trace with hash -235349204, now seen corresponding path program 5 times [2025-02-06 13:13:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320438004] [2025-02-06 13:13:22,627 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:13:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:22,631 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-02-06 13:13:22,646 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:13:22,647 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:13:22,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:23,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:23,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320438004] [2025-02-06 13:13:23,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320438004] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761368148] [2025-02-06 13:13:23,455 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:13:23,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:23,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:23,457 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:23,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 13:13:23,503 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-02-06 13:13:23,529 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:13:23,530 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:13:23,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:23,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 13:13:23,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:23,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:13:23,744 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2025-02-06 13:13:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:23,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:23,834 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-02-06 13:13:23,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-02-06 13:13:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:23,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761368148] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:23,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:23,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 22 [2025-02-06 13:13:23,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993277075] [2025-02-06 13:13:23,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:23,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 13:13:23,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:23,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 13:13:23,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2025-02-06 13:13:24,428 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:24,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 196 transitions, 3039 flow. Second operand has 23 states, 23 states have (on average 14.652173913043478) internal successors, (337), 23 states have internal predecessors, (337), 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) [2025-02-06 13:13:24,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:24,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:24,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:25,061 INFO L124 PetriNetUnfolderBase]: 1338/2334 cut-off events. [2025-02-06 13:13:25,061 INFO L125 PetriNetUnfolderBase]: For 25337/25337 co-relation queries the response was YES. [2025-02-06 13:13:25,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16398 conditions, 2334 events. 1338/2334 cut-off events. For 25337/25337 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12356 event pairs, 210 based on Foata normal form. 1/2335 useless extension candidates. Maximal degree in co-relation 16355. Up to 1654 conditions per place. [2025-02-06 13:13:25,079 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 246 selfloop transitions, 74 changer transitions 1/322 dead transitions. [2025-02-06 13:13:25,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 322 transitions, 5350 flow [2025-02-06 13:13:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:13:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:13:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 265 transitions. [2025-02-06 13:13:25,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5567226890756303 [2025-02-06 13:13:25,080 INFO L175 Difference]: Start difference. First operand has 123 places, 196 transitions, 3039 flow. Second operand 14 states and 265 transitions. [2025-02-06 13:13:25,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 322 transitions, 5350 flow [2025-02-06 13:13:25,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 322 transitions, 5234 flow, removed 33 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:25,122 INFO L231 Difference]: Finished difference. Result has 136 places, 247 transitions, 4025 flow [2025-02-06 13:13:25,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4025, PETRI_PLACES=136, PETRI_TRANSITIONS=247} [2025-02-06 13:13:25,123 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 101 predicate places. [2025-02-06 13:13:25,123 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 247 transitions, 4025 flow [2025-02-06 13:13:25,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.652173913043478) internal successors, (337), 23 states have internal predecessors, (337), 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) [2025-02-06 13:13:25,123 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:25,123 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] [2025-02-06 13:13:25,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:25,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:25,324 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:25,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash 704650365, now seen corresponding path program 6 times [2025-02-06 13:13:25,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:25,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978434011] [2025-02-06 13:13:25,325 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:13:25,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:25,329 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-06 13:13:25,341 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:13:25,341 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:13:25,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:25,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978434011] [2025-02-06 13:13:25,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978434011] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759980074] [2025-02-06 13:13:25,515 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:13:25,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:25,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:25,523 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:25,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 13:13:25,564 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-06 13:13:25,601 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:13:25,602 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:13:25,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:25,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:13:25,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:25,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:25,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759980074] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:25,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:25,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 21 [2025-02-06 13:13:25,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749695419] [2025-02-06 13:13:25,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:25,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 13:13:25,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:25,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 13:13:25,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2025-02-06 13:13:25,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:25,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 247 transitions, 4025 flow. Second operand has 21 states, 21 states have (on average 14.380952380952381) internal successors, (302), 21 states have internal predecessors, (302), 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) [2025-02-06 13:13:25,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:25,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:25,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:27,235 INFO L124 PetriNetUnfolderBase]: 2069/3596 cut-off events. [2025-02-06 13:13:27,235 INFO L125 PetriNetUnfolderBase]: For 40602/40602 co-relation queries the response was YES. [2025-02-06 13:13:27,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25736 conditions, 3596 events. 2069/3596 cut-off events. For 40602/40602 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19750 event pairs, 103 based on Foata normal form. 144/3740 useless extension candidates. Maximal degree in co-relation 25688. Up to 900 conditions per place. [2025-02-06 13:13:27,255 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 223 selfloop transitions, 357 changer transitions 0/581 dead transitions. [2025-02-06 13:13:27,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 581 transitions, 9775 flow [2025-02-06 13:13:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-06 13:13:27,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-02-06 13:13:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 567 transitions. [2025-02-06 13:13:27,257 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5379506641366224 [2025-02-06 13:13:27,257 INFO L175 Difference]: Start difference. First operand has 136 places, 247 transitions, 4025 flow. Second operand 31 states and 567 transitions. [2025-02-06 13:13:27,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 581 transitions, 9775 flow [2025-02-06 13:13:27,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 581 transitions, 9543 flow, removed 100 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:27,308 INFO L231 Difference]: Finished difference. Result has 177 places, 455 transitions, 8629 flow [2025-02-06 13:13:27,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3876, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8629, PETRI_PLACES=177, PETRI_TRANSITIONS=455} [2025-02-06 13:13:27,309 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 142 predicate places. [2025-02-06 13:13:27,309 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 455 transitions, 8629 flow [2025-02-06 13:13:27,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.380952380952381) internal successors, (302), 21 states have internal predecessors, (302), 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) [2025-02-06 13:13:27,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:27,309 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:27,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 13:13:27,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:27,510 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:27,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:27,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1519517419, now seen corresponding path program 7 times [2025-02-06 13:13:27,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:27,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795114393] [2025-02-06 13:13:27,510 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:13:27,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:27,517 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:13:27,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:27,527 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:27,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:27,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:27,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795114393] [2025-02-06 13:13:27,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795114393] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:27,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574718177] [2025-02-06 13:13:27,697 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:13:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:27,701 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:27,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 13:13:27,743 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:13:27,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:27,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:27,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:27,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:13:27,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:27,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:27,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574718177] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:27,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:27,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-02-06 13:13:27,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334025193] [2025-02-06 13:13:27,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:27,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:13:27,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:27,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:13:27,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:13:27,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:27,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 455 transitions, 8629 flow. Second operand has 17 states, 17 states have (on average 14.352941176470589) internal successors, (244), 17 states have internal predecessors, (244), 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) [2025-02-06 13:13:27,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:27,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:27,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:29,096 INFO L124 PetriNetUnfolderBase]: 2276/3978 cut-off events. [2025-02-06 13:13:29,096 INFO L125 PetriNetUnfolderBase]: For 71063/71063 co-relation queries the response was YES. [2025-02-06 13:13:29,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33634 conditions, 3978 events. 2276/3978 cut-off events. For 71063/71063 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 22689 event pairs, 342 based on Foata normal form. 12/3990 useless extension candidates. Maximal degree in co-relation 33571. Up to 1504 conditions per place. [2025-02-06 13:13:29,132 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 507 selfloop transitions, 159 changer transitions 28/695 dead transitions. [2025-02-06 13:13:29,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 695 transitions, 13834 flow [2025-02-06 13:13:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 13:13:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 13:13:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 329 transitions. [2025-02-06 13:13:29,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5375816993464052 [2025-02-06 13:13:29,134 INFO L175 Difference]: Start difference. First operand has 177 places, 455 transitions, 8629 flow. Second operand 18 states and 329 transitions. [2025-02-06 13:13:29,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 695 transitions, 13834 flow [2025-02-06 13:13:29,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 695 transitions, 13004 flow, removed 349 selfloop flow, removed 5 redundant places. [2025-02-06 13:13:29,367 INFO L231 Difference]: Finished difference. Result has 200 places, 530 transitions, 10127 flow [2025-02-06 13:13:29,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=8056, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10127, PETRI_PLACES=200, PETRI_TRANSITIONS=530} [2025-02-06 13:13:29,368 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 165 predicate places. [2025-02-06 13:13:29,368 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 530 transitions, 10127 flow [2025-02-06 13:13:29,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.352941176470589) internal successors, (244), 17 states have internal predecessors, (244), 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) [2025-02-06 13:13:29,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:29,368 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:29,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:29,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-06 13:13:29,572 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:29,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 898559883, now seen corresponding path program 8 times [2025-02-06 13:13:29,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:29,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813245000] [2025-02-06 13:13:29,573 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:29,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:29,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:13:29,587 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:29,587 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:29,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:29,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:29,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813245000] [2025-02-06 13:13:29,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813245000] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:29,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124904358] [2025-02-06 13:13:29,772 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:29,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:29,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:29,774 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:29,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-06 13:13:29,821 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:13:29,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:29,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:29,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:29,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:13:29,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:29,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:30,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124904358] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:30,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:30,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2025-02-06 13:13:30,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933881898] [2025-02-06 13:13:30,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:30,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:13:30,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:30,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:13:30,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:13:30,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:30,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 530 transitions, 10127 flow. Second operand has 22 states, 22 states have (on average 14.181818181818182) internal successors, (312), 22 states have internal predecessors, (312), 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) [2025-02-06 13:13:30,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:30,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:30,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:35,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-06 13:13:43,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-06 13:13:48,264 INFO L124 PetriNetUnfolderBase]: 3197/5640 cut-off events. [2025-02-06 13:13:48,264 INFO L125 PetriNetUnfolderBase]: For 104260/104260 co-relation queries the response was YES. [2025-02-06 13:13:48,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47284 conditions, 5640 events. 3197/5640 cut-off events. For 104260/104260 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 35063 event pairs, 358 based on Foata normal form. 42/5682 useless extension candidates. Maximal degree in co-relation 47211. Up to 1497 conditions per place. [2025-02-06 13:13:48,330 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 447 selfloop transitions, 668 changer transitions 6/1122 dead transitions. [2025-02-06 13:13:48,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1122 transitions, 21935 flow [2025-02-06 13:13:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-02-06 13:13:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2025-02-06 13:13:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 962 transitions. [2025-02-06 13:13:48,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2025-02-06 13:13:48,333 INFO L175 Difference]: Start difference. First operand has 200 places, 530 transitions, 10127 flow. Second operand 52 states and 962 transitions. [2025-02-06 13:13:48,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 1122 transitions, 21935 flow [2025-02-06 13:13:48,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1122 transitions, 21393 flow, removed 271 selfloop flow, removed 3 redundant places. [2025-02-06 13:13:48,801 INFO L231 Difference]: Finished difference. Result has 274 places, 915 transitions, 19808 flow [2025-02-06 13:13:48,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=9965, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=19808, PETRI_PLACES=274, PETRI_TRANSITIONS=915} [2025-02-06 13:13:48,802 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 239 predicate places. [2025-02-06 13:13:48,802 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 915 transitions, 19808 flow [2025-02-06 13:13:48,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.181818181818182) internal successors, (312), 22 states have internal predecessors, (312), 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) [2025-02-06 13:13:48,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:48,803 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:48,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:49,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:49,004 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:13:49,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:49,005 INFO L85 PathProgramCache]: Analyzing trace with hash -434113531, now seen corresponding path program 9 times [2025-02-06 13:13:49,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:49,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158669683] [2025-02-06 13:13:49,005 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:13:49,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:49,009 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-02-06 13:13:49,022 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:49,023 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:13:49,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158669683] [2025-02-06 13:13:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158669683] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548280700] [2025-02-06 13:13:49,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:13:49,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:49,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:49,236 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:13:49,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-06 13:13:49,281 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-02-06 13:13:49,303 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:49,303 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:13:49,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:49,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:13:49,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:49,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548280700] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:49,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:49,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 24 [2025-02-06 13:13:49,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361735870] [2025-02-06 13:13:49,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:49,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:13:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:49,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:13:49,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:13:49,590 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:13:49,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 915 transitions, 19808 flow. Second operand has 24 states, 24 states have (on average 13.958333333333334) internal successors, (335), 24 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) [2025-02-06 13:13:49,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:49,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:13:49,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:54,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-06 13:14:00,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-06 13:14:01,549 INFO L124 PetriNetUnfolderBase]: 3539/6332 cut-off events. [2025-02-06 13:14:01,549 INFO L125 PetriNetUnfolderBase]: For 136027/136027 co-relation queries the response was YES. [2025-02-06 13:14:01,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57757 conditions, 6332 events. 3539/6332 cut-off events. For 136027/136027 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 41467 event pairs, 322 based on Foata normal form. 57/6389 useless extension candidates. Maximal degree in co-relation 57657. Up to 1412 conditions per place. [2025-02-06 13:14:01,624 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 552 selfloop transitions, 680 changer transitions 28/1261 dead transitions. [2025-02-06 13:14:01,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1261 transitions, 28192 flow [2025-02-06 13:14:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-02-06 13:14:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-02-06 13:14:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 679 transitions. [2025-02-06 13:14:01,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5120663650075414 [2025-02-06 13:14:01,626 INFO L175 Difference]: Start difference. First operand has 274 places, 915 transitions, 19808 flow. Second operand 39 states and 679 transitions. [2025-02-06 13:14:01,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1261 transitions, 28192 flow [2025-02-06 13:14:02,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1261 transitions, 26886 flow, removed 618 selfloop flow, removed 5 redundant places. [2025-02-06 13:14:02,611 INFO L231 Difference]: Finished difference. Result has 319 places, 1054 transitions, 23964 flow [2025-02-06 13:14:02,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=18844, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=23964, PETRI_PLACES=319, PETRI_TRANSITIONS=1054} [2025-02-06 13:14:02,613 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 284 predicate places. [2025-02-06 13:14:02,613 INFO L471 AbstractCegarLoop]: Abstraction has has 319 places, 1054 transitions, 23964 flow [2025-02-06 13:14:02,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.958333333333334) internal successors, (335), 24 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) [2025-02-06 13:14:02,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:14:02,613 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:14:02,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-06 13:14:02,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:14:02,814 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:14:02,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:14:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1578041339, now seen corresponding path program 10 times [2025-02-06 13:14:02,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:14:02,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834605831] [2025-02-06 13:14:02,814 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:14:02,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:14:02,819 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:14:02,824 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:14:02,824 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:14:02,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:14:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:14:03,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:14:03,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834605831] [2025-02-06 13:14:03,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834605831] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:14:03,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136705957] [2025-02-06 13:14:03,028 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:14:03,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:14:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:14:03,030 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:14:03,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-06 13:14:03,079 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:14:03,102 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:14:03,102 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:14:03,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:14:03,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:14:03,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:14:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:14:03,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:14:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:14:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136705957] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:14:03,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:14:03,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-02-06 13:14:03,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622603015] [2025-02-06 13:14:03,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:14:03,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:14:03,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:14:03,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:14:03,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2025-02-06 13:14:03,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-06 13:14:03,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1054 transitions, 23964 flow. Second operand has 19 states, 19 states have (on average 14.210526315789474) internal successors, (270), 19 states have internal predecessors, (270), 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) [2025-02-06 13:14:03,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:14:03,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-06 13:14:03,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:14:22,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-06 13:14:26,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []