./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 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/popl20-more-min-array.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 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:10:02,227 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:10:02,289 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:10:02,295 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:10:02,297 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:10:02,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:10:02,324 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:10:02,324 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:10:02,324 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:10:02,325 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:10:02,325 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:10:02,325 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:10:02,326 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:10:02,326 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:10:02,326 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:10:02,326 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:10:02,326 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:10:02,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:10:02,327 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:10:02,328 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:10:02,328 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:10:02,328 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:10:02,328 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:10:02,328 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:10:02,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:10:02,328 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:10:02,329 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:10:02,329 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:10:02,329 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 -> 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 [2025-01-10 01:10:02,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:10:02,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:10:02,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:10:02,560 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:10:02,560 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:10:02,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2025-01-10 01:10:03,682 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3d4fdc588/29c3d226c2864f55809ac11a7777bb37/FLAG0201f09c6 [2025-01-10 01:10:03,889 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:10:03,890 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2025-01-10 01:10:03,912 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3d4fdc588/29c3d226c2864f55809ac11a7777bb37/FLAG0201f09c6 [2025-01-10 01:10:04,251 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3d4fdc588/29c3d226c2864f55809ac11a7777bb37 [2025-01-10 01:10:04,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:10:04,253 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:10:04,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:10:04,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:10:04,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:10:04,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1c6a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04, skipping insertion in model container [2025-01-10 01:10:04,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,275 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:10:04,397 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-10 01:10:04,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:10:04,406 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:10:04,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:10:04,443 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:10:04,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04 WrapperNode [2025-01-10 01:10:04,444 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:10:04,445 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:10:04,445 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:10:04,445 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:10:04,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,478 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 85 [2025-01-10 01:10:04,479 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:10:04,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:10:04,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:10:04,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:10:04,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,489 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,498 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2025-01-10 01:10:04,498 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,498 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,504 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,505 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,508 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,510 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:10:04,511 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:10:04,511 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:10:04,511 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:10:04,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (1/1) ... [2025-01-10 01:10:04,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:10:04,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:04,539 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) [2025-01-10 01:10:04,540 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 [2025-01-10 01:10:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:10:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:10:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-01-10 01:10:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:10:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:10:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:10:04,557 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 01:10:04,619 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:10:04,620 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:10:04,832 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:10:04,832 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:10:04,982 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:10:04,983 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:10:04,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:10:04 BoogieIcfgContainer [2025-01-10 01:10:04,983 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:10:04,986 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:10:04,986 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:10:04,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:10:04,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:10:04" (1/3) ... [2025-01-10 01:10:04,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f78189d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:10:04, skipping insertion in model container [2025-01-10 01:10:04,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:04" (2/3) ... [2025-01-10 01:10:04,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f78189d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:10:04, skipping insertion in model container [2025-01-10 01:10:04,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:10:04" (3/3) ... [2025-01-10 01:10:04,992 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2025-01-10 01:10:05,004 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:10:05,005 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-min-array.wvr.c that has 4 procedures, 47 locations, 1 initial locations, 4 loop locations, and 16 error locations. [2025-01-10 01:10:05,005 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:10:05,060 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-01-10 01:10:05,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2025-01-10 01:10:05,127 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2025-01-10 01:10:05,129 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:10:05,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 106 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2025-01-10 01:10:05,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2025-01-10 01:10:05,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2025-01-10 01:10:05,141 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:10:05,153 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;@431e9d8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:10:05,153 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2025-01-10 01:10:05,156 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:10:05,157 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-10 01:10:05,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:10:05,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:05,158 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:10:05,158 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:05,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:05,162 INFO L85 PathProgramCache]: Analyzing trace with hash 465188, now seen corresponding path program 1 times [2025-01-10 01:10:05,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:05,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181267388] [2025-01-10 01:10:05,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:05,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:05,221 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:10:05,237 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:10:05,237 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:05,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:10:05,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:05,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181267388] [2025-01-10 01:10:05,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181267388] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:05,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:05,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:10:05,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818465129] [2025-01-10 01:10:05,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:05,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:10:05,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:05,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:10:05,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:10:05,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:05,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:05,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:05,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:05,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:05,667 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2025-01-10 01:10:05,667 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2025-01-10 01:10:05,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9866 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2025-01-10 01:10:05,685 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2025-01-10 01:10:05,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2025-01-10 01:10:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:10:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:10:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2025-01-10 01:10:05,697 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2025-01-10 01:10:05,699 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2025-01-10 01:10:05,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2025-01-10 01:10:05,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:10:05,714 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2025-01-10 01:10:05,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2025-01-10 01:10:05,720 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2025-01-10 01:10:05,720 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2025-01-10 01:10:05,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:05,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:05,720 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:10:05,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:10:05,721 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:05,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash 465189, now seen corresponding path program 1 times [2025-01-10 01:10:05,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:05,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247318228] [2025-01-10 01:10:05,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:05,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:05,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:10:05,750 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:10:05,750 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:05,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:10:05,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247318228] [2025-01-10 01:10:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247318228] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:05,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:05,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:10:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603105973] [2025-01-10 01:10:05,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:05,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:10:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:05,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:10:05,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:10:05,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:05,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:05,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:05,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:05,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:06,169 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2025-01-10 01:10:06,169 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:10:06,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9856 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2025-01-10 01:10:06,181 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2025-01-10 01:10:06,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2025-01-10 01:10:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:10:06,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:10:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2025-01-10 01:10:06,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.365 [2025-01-10 01:10:06,183 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2025-01-10 01:10:06,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2025-01-10 01:10:06,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:06,184 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2025-01-10 01:10:06,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2025-01-10 01:10:06,185 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2025-01-10 01:10:06,185 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2025-01-10 01:10:06,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:06,185 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:06,186 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-01-10 01:10:06,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:10:06,186 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:06,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 447061109, now seen corresponding path program 1 times [2025-01-10 01:10:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:06,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840484913] [2025-01-10 01:10:06,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:06,192 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:10:06,208 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:10:06,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:06,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:10:06,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840484913] [2025-01-10 01:10:06,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840484913] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:06,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690543867] [2025-01-10 01:10:06,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:06,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:06,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:06,446 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) [2025-01-10 01:10:06,448 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 [2025-01-10 01:10:06,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:10:06,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:10:06,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:06,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:06,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:10:06,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:06,567 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 [2025-01-10 01:10:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:10:06,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:10:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690543867] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:06,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:06,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-01-10 01:10:06,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268577513] [2025-01-10 01:10:06,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:06,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:10:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:06,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:10:06,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:10:06,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:06,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2025-01-10 01:10:06,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:06,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:06,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:07,149 INFO L124 PetriNetUnfolderBase]: 1318/1935 cut-off events. [2025-01-10 01:10:07,150 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:10:07,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 1935 events. 1318/1935 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9839 event pairs, 1060 based on Foata normal form. 0/1380 useless extension candidates. Maximal degree in co-relation 3850. Up to 1879 conditions per place. [2025-01-10 01:10:07,164 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 10 changer transitions 0/42 dead transitions. [2025-01-10 01:10:07,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 191 flow [2025-01-10 01:10:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:10:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:10:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2025-01-10 01:10:07,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28 [2025-01-10 01:10:07,168 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 8 states and 112 transitions. [2025-01-10 01:10:07,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 191 flow [2025-01-10 01:10:07,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:10:07,170 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2025-01-10 01:10:07,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2025-01-10 01:10:07,171 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2025-01-10 01:10:07,172 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2025-01-10 01:10:07,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2025-01-10 01:10:07,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:07,173 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:10:07,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 01:10:07,373 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 [2025-01-10 01:10:07,374 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:07,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:07,374 INFO L85 PathProgramCache]: Analyzing trace with hash 976012311, now seen corresponding path program 1 times [2025-01-10 01:10:07,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:07,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666647062] [2025-01-10 01:10:07,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:07,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:07,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:10:07,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:10:07,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:07,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:10:07,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:07,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666647062] [2025-01-10 01:10:07,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666647062] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:07,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:07,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:10:07,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367607060] [2025-01-10 01:10:07,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:07,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:10:07,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:07,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:10:07,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:10:07,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:07,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:07,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:07,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:07,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:07,594 INFO L124 PetriNetUnfolderBase]: 794/1180 cut-off events. [2025-01-10 01:10:07,595 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-01-10 01:10:07,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2380 conditions, 1180 events. 794/1180 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5346 event pairs, 608 based on Foata normal form. 0/964 useless extension candidates. Maximal degree in co-relation 2342. Up to 1136 conditions per place. [2025-01-10 01:10:07,603 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2025-01-10 01:10:07,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 196 flow [2025-01-10 01:10:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:10:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:10:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2025-01-10 01:10:07,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34 [2025-01-10 01:10:07,605 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 4 states and 68 transitions. [2025-01-10 01:10:07,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 196 flow [2025-01-10 01:10:07,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 154 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-01-10 01:10:07,606 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 92 flow [2025-01-10 01:10:07,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2025-01-10 01:10:07,607 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2025-01-10 01:10:07,607 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 92 flow [2025-01-10 01:10:07,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:07,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:07,607 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:10:07,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-10 01:10:07,607 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:07,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash 976012312, now seen corresponding path program 1 times [2025-01-10 01:10:07,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:07,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181147247] [2025-01-10 01:10:07,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:07,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:10:07,617 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:10:07,617 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:07,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:10:07,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:07,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181147247] [2025-01-10 01:10:07,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181147247] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:07,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:07,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:10:07,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571360977] [2025-01-10 01:10:07,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:07,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:10:07,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:07,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:10:07,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:10:07,664 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:07,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:07,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:07,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:07,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:07,782 INFO L124 PetriNetUnfolderBase]: 793/1179 cut-off events. [2025-01-10 01:10:07,782 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-01-10 01:10:07,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1179 events. 793/1179 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5318 event pairs, 608 based on Foata normal form. 1/966 useless extension candidates. Maximal degree in co-relation 2334. Up to 1141 conditions per place. [2025-01-10 01:10:07,789 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2025-01-10 01:10:07,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 156 flow [2025-01-10 01:10:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:10:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:10:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2025-01-10 01:10:07,791 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2025-01-10 01:10:07,791 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 92 flow. Second operand 3 states and 62 transitions. [2025-01-10 01:10:07,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 156 flow [2025-01-10 01:10:07,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:07,793 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 88 flow [2025-01-10 01:10:07,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2025-01-10 01:10:07,794 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2025-01-10 01:10:07,795 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 88 flow [2025-01-10 01:10:07,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:07,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:07,796 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:07,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-10 01:10:07,796 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:07,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:07,796 INFO L85 PathProgramCache]: Analyzing trace with hash -293617976, now seen corresponding path program 1 times [2025-01-10 01:10:07,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:07,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637712922] [2025-01-10 01:10:07,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:07,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:07,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:10:07,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:10:07,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:07,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:07,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:07,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637712922] [2025-01-10 01:10:07,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637712922] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:07,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615364215] [2025-01-10 01:10:07,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:07,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:07,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:07,961 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) [2025-01-10 01:10:07,963 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 [2025-01-10 01:10:08,013 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:10:08,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:10:08,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:08,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:08,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:10:08,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:08,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:08,123 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 22 treesize of output 18 [2025-01-10 01:10:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:08,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615364215] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:08,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:08,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-10 01:10:08,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189049036] [2025-01-10 01:10:08,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:08,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:10:08,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:08,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:10:08,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:10:08,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:08,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 88 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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) [2025-01-10 01:10:08,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:08,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:08,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:08,441 INFO L124 PetriNetUnfolderBase]: 1149/1714 cut-off events. [2025-01-10 01:10:08,441 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-01-10 01:10:08,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3386 conditions, 1714 events. 1149/1714 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8285 event pairs, 483 based on Foata normal form. 0/1460 useless extension candidates. Maximal degree in co-relation 3375. Up to 988 conditions per place. [2025-01-10 01:10:08,449 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 58 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2025-01-10 01:10:08,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 292 flow [2025-01-10 01:10:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:10:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:10:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2025-01-10 01:10:08,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2025-01-10 01:10:08,451 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 88 flow. Second operand 7 states and 135 transitions. [2025-01-10 01:10:08,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 292 flow [2025-01-10 01:10:08,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:08,452 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 124 flow [2025-01-10 01:10:08,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=124, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2025-01-10 01:10:08,452 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2025-01-10 01:10:08,452 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 124 flow [2025-01-10 01:10:08,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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) [2025-01-10 01:10:08,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:08,453 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:08,459 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 [2025-01-10 01:10:08,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:08,653 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:08,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1273220788, now seen corresponding path program 1 times [2025-01-10 01:10:08,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:08,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110293548] [2025-01-10 01:10:08,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:08,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:08,660 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 01:10:08,664 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 01:10:08,665 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:08,665 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:08,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:08,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110293548] [2025-01-10 01:10:08,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110293548] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:08,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994747217] [2025-01-10 01:10:08,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:08,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:08,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:08,736 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) [2025-01-10 01:10:08,738 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 [2025-01-10 01:10:08,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 01:10:08,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 01:10:08,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:08,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:08,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:10:08,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:08,830 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:08,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994747217] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:08,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:08,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-01-10 01:10:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775637707] [2025-01-10 01:10:08,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:08,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:10:08,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:08,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:10:08,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:10:08,900 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:08,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 124 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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) [2025-01-10 01:10:08,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:08,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:08,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:09,240 INFO L124 PetriNetUnfolderBase]: 1981/2894 cut-off events. [2025-01-10 01:10:09,240 INFO L125 PetriNetUnfolderBase]: For 1730/1730 co-relation queries the response was YES. [2025-01-10 01:10:09,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7160 conditions, 2894 events. 1981/2894 cut-off events. For 1730/1730 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14270 event pairs, 1344 based on Foata normal form. 0/2564 useless extension candidates. Maximal degree in co-relation 4829. Up to 1931 conditions per place. [2025-01-10 01:10:09,257 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 72 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2025-01-10 01:10:09,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 424 flow [2025-01-10 01:10:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:10:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:10:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2025-01-10 01:10:09,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2025-01-10 01:10:09,259 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 124 flow. Second operand 7 states and 135 transitions. [2025-01-10 01:10:09,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 424 flow [2025-01-10 01:10:09,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 83 transitions, 418 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:09,262 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 149 flow [2025-01-10 01:10:09,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=149, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2025-01-10 01:10:09,263 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2025-01-10 01:10:09,263 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 149 flow [2025-01-10 01:10:09,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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) [2025-01-10 01:10:09,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:09,263 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:09,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-10 01:10:09,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:09,467 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:09,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:09,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1675798910, now seen corresponding path program 1 times [2025-01-10 01:10:09,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:09,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275040476] [2025-01-10 01:10:09,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:09,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:09,474 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:10:09,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:10:09,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:09,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:09,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:09,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275040476] [2025-01-10 01:10:09,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275040476] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:09,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920327326] [2025-01-10 01:10:09,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:09,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:09,550 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) [2025-01-10 01:10:09,552 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 [2025-01-10 01:10:09,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:10:09,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:10:09,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:09,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:09,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:10:09,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:09,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:09,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920327326] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:09,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:09,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-10 01:10:09,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900945742] [2025-01-10 01:10:09,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:09,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:10:09,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:09,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:10:09,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:10:09,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:09,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 149 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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) [2025-01-10 01:10:09,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:09,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:09,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:10,017 INFO L124 PetriNetUnfolderBase]: 1935/2834 cut-off events. [2025-01-10 01:10:10,017 INFO L125 PetriNetUnfolderBase]: For 1587/1686 co-relation queries the response was YES. [2025-01-10 01:10:10,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 2834 events. 1935/2834 cut-off events. For 1587/1686 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13858 event pairs, 1243 based on Foata normal form. 38/2611 useless extension candidates. Maximal degree in co-relation 5143. Up to 2035 conditions per place. [2025-01-10 01:10:10,039 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 75 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2025-01-10 01:10:10,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 451 flow [2025-01-10 01:10:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:10:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:10:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2025-01-10 01:10:10,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2025-01-10 01:10:10,041 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 149 flow. Second operand 8 states and 155 transitions. [2025-01-10 01:10:10,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 451 flow [2025-01-10 01:10:10,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 440 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:10:10,046 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 199 flow [2025-01-10 01:10:10,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=199, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2025-01-10 01:10:10,048 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-01-10 01:10:10,048 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 199 flow [2025-01-10 01:10:10,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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) [2025-01-10 01:10:10,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:10,049 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:10,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 01:10:10,251 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,SelfDestructingSolverStorable7 [2025-01-10 01:10:10,251 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:10,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:10,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1406792036, now seen corresponding path program 2 times [2025-01-10 01:10:10,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:10,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828591664] [2025-01-10 01:10:10,252 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:10,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:10,265 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-01-10 01:10:10,278 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 12 statements. [2025-01-10 01:10:10,278 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:10:10,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:10,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:10,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828591664] [2025-01-10 01:10:10,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828591664] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:10,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:10,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:10:10,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84934902] [2025-01-10 01:10:10,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:10,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:10:10,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:10,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:10:10,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:10:10,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:10,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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) [2025-01-10 01:10:10,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:10,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:10,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:10,761 INFO L124 PetriNetUnfolderBase]: 2553/3654 cut-off events. [2025-01-10 01:10:10,761 INFO L125 PetriNetUnfolderBase]: For 4659/4731 co-relation queries the response was YES. [2025-01-10 01:10:10,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10478 conditions, 3654 events. 2553/3654 cut-off events. For 4659/4731 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17394 event pairs, 1080 based on Foata normal form. 0/3202 useless extension candidates. Maximal degree in co-relation 8285. Up to 2426 conditions per place. [2025-01-10 01:10:10,778 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 77 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2025-01-10 01:10:10,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 89 transitions, 557 flow [2025-01-10 01:10:10,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:10:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:10:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2025-01-10 01:10:10,779 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39 [2025-01-10 01:10:10,779 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 199 flow. Second operand 6 states and 117 transitions. [2025-01-10 01:10:10,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 89 transitions, 557 flow [2025-01-10 01:10:10,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 89 transitions, 542 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-01-10 01:10:10,787 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 229 flow [2025-01-10 01:10:10,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2025-01-10 01:10:10,788 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2025-01-10 01:10:10,788 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 229 flow [2025-01-10 01:10:10,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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) [2025-01-10 01:10:10,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:10,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:10,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-01-10 01:10:10,789 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:10,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:10,789 INFO L85 PathProgramCache]: Analyzing trace with hash -533997279, now seen corresponding path program 1 times [2025-01-10 01:10:10,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:10,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134737025] [2025-01-10 01:10:10,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:10,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:10,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 01:10:10,802 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 01:10:10,805 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:10,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:10,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:10,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134737025] [2025-01-10 01:10:10,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134737025] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:10,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798107150] [2025-01-10 01:10:10,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:10,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:10,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:10,945 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) [2025-01-10 01:10:10,947 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 [2025-01-10 01:10:10,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 01:10:10,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 01:10:10,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:10,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:10,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 01:10:10,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:11,092 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:10:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798107150] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:11,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 01:10:11,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2025-01-10 01:10:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458727803] [2025-01-10 01:10:11,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:11,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:10:11,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:11,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:10:11,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:10:11,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:11,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2025-01-10 01:10:11,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:11,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:11,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:11,459 INFO L124 PetriNetUnfolderBase]: 2963/4460 cut-off events. [2025-01-10 01:10:11,459 INFO L125 PetriNetUnfolderBase]: For 7369/7652 co-relation queries the response was YES. [2025-01-10 01:10:11,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13535 conditions, 4460 events. 2963/4460 cut-off events. For 7369/7652 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 23570 event pairs, 1574 based on Foata normal form. 126/4422 useless extension candidates. Maximal degree in co-relation 10320. Up to 3100 conditions per place. [2025-01-10 01:10:11,483 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 66 selfloop transitions, 6 changer transitions 0/77 dead transitions. [2025-01-10 01:10:11,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 524 flow [2025-01-10 01:10:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:10:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:10:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-01-10 01:10:11,484 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.384 [2025-01-10 01:10:11,484 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 229 flow. Second operand 5 states and 96 transitions. [2025-01-10 01:10:11,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 524 flow [2025-01-10 01:10:11,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 502 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:11,493 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 239 flow [2025-01-10 01:10:11,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2025-01-10 01:10:11,493 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2025-01-10 01:10:11,494 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 239 flow [2025-01-10 01:10:11,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2025-01-10 01:10:11,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:11,494 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:11,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:11,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-01-10 01:10:11,694 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:11,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:11,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1521540302, now seen corresponding path program 2 times [2025-01-10 01:10:11,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:11,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235006224] [2025-01-10 01:10:11,695 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:11,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:11,700 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-01-10 01:10:11,708 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:10:11,708 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:11,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:11,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235006224] [2025-01-10 01:10:11,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235006224] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807288057] [2025-01-10 01:10:11,894 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:11,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:11,896 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) [2025-01-10 01:10:11,898 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 [2025-01-10 01:10:11,934 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-01-10 01:10:11,946 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:10:11,947 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:11,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:11,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-10 01:10:11,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:11,961 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 [2025-01-10 01:10:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:12,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:12,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807288057] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:12,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:12,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-01-10 01:10:12,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607324875] [2025-01-10 01:10:12,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:12,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-10 01:10:12,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:12,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-10 01:10:12,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-01-10 01:10:12,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:12,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 239 flow. Second operand has 17 states, 17 states have (on average 10.941176470588236) internal successors, (186), 17 states have internal predecessors, (186), 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) [2025-01-10 01:10:12,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:12,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:12,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:13,216 INFO L124 PetriNetUnfolderBase]: 4253/6053 cut-off events. [2025-01-10 01:10:13,216 INFO L125 PetriNetUnfolderBase]: For 7240/7837 co-relation queries the response was YES. [2025-01-10 01:10:13,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19309 conditions, 6053 events. 4253/6053 cut-off events. For 7240/7837 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 31824 event pairs, 650 based on Foata normal form. 424/6451 useless extension candidates. Maximal degree in co-relation 14336. Up to 1688 conditions per place. [2025-01-10 01:10:13,251 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 140 selfloop transitions, 18 changer transitions 0/162 dead transitions. [2025-01-10 01:10:13,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 162 transitions, 1007 flow [2025-01-10 01:10:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:10:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:10:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2025-01-10 01:10:13,253 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43555555555555553 [2025-01-10 01:10:13,253 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 239 flow. Second operand 9 states and 196 transitions. [2025-01-10 01:10:13,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 162 transitions, 1007 flow [2025-01-10 01:10:13,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 162 transitions, 983 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:13,266 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 305 flow [2025-01-10 01:10:13,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2025-01-10 01:10:13,266 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2025-01-10 01:10:13,266 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 305 flow [2025-01-10 01:10:13,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.941176470588236) internal successors, (186), 17 states have internal predecessors, (186), 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) [2025-01-10 01:10:13,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:13,266 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:13,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:13,467 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,SelfDestructingSolverStorable10 [2025-01-10 01:10:13,467 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:13,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash -548780981, now seen corresponding path program 1 times [2025-01-10 01:10:13,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:13,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617757344] [2025-01-10 01:10:13,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:13,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:13,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:10:13,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:10:13,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:13,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:13,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617757344] [2025-01-10 01:10:13,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617757344] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51358544] [2025-01-10 01:10:13,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:13,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:13,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:13,585 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) [2025-01-10 01:10:13,587 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 [2025-01-10 01:10:13,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:10:13,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:10:13,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:13,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:13,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:10:13,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:13,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:13,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51358544] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:13,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:13,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-01-10 01:10:13,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974760659] [2025-01-10 01:10:13,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:13,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 01:10:13,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:13,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 01:10:13,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2025-01-10 01:10:13,839 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:13,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 305 flow. Second operand has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 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) [2025-01-10 01:10:13,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:13,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:13,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:14,569 INFO L124 PetriNetUnfolderBase]: 6757/9993 cut-off events. [2025-01-10 01:10:14,569 INFO L125 PetriNetUnfolderBase]: For 23539/23833 co-relation queries the response was YES. [2025-01-10 01:10:14,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34412 conditions, 9993 events. 6757/9993 cut-off events. For 23539/23833 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 55891 event pairs, 3538 based on Foata normal form. 86/9908 useless extension candidates. Maximal degree in co-relation 17729. Up to 4998 conditions per place. [2025-01-10 01:10:14,617 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 119 selfloop transitions, 14 changer transitions 0/138 dead transitions. [2025-01-10 01:10:14,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 138 transitions, 1020 flow [2025-01-10 01:10:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:10:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:10:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2025-01-10 01:10:14,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2025-01-10 01:10:14,619 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 305 flow. Second operand 9 states and 170 transitions. [2025-01-10 01:10:14,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 138 transitions, 1020 flow [2025-01-10 01:10:14,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 138 transitions, 935 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-01-10 01:10:14,641 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 363 flow [2025-01-10 01:10:14,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=363, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2025-01-10 01:10:14,642 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2025-01-10 01:10:14,642 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 363 flow [2025-01-10 01:10:14,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 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) [2025-01-10 01:10:14,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:14,642 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:14,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:14,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:14,843 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:14,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:14,843 INFO L85 PathProgramCache]: Analyzing trace with hash 246483543, now seen corresponding path program 1 times [2025-01-10 01:10:14,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:14,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306427327] [2025-01-10 01:10:14,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:14,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:14,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:10:14,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:10:14,853 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:14,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:14,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:14,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306427327] [2025-01-10 01:10:14,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306427327] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:14,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672050447] [2025-01-10 01:10:14,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:14,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:14,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:14,922 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) [2025-01-10 01:10:14,924 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 [2025-01-10 01:10:14,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:10:14,973 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:10:14,973 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:14,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:14,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-10 01:10:14,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:15,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:15,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672050447] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:15,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:15,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-10 01:10:15,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550646829] [2025-01-10 01:10:15,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:15,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:10:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:15,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:10:15,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:10:15,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:15,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 363 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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) [2025-01-10 01:10:15,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:15,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:15,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:15,840 INFO L124 PetriNetUnfolderBase]: 6608/9607 cut-off events. [2025-01-10 01:10:15,840 INFO L125 PetriNetUnfolderBase]: For 22941/24240 co-relation queries the response was YES. [2025-01-10 01:10:15,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33944 conditions, 9607 events. 6608/9607 cut-off events. For 22941/24240 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 51602 event pairs, 4577 based on Foata normal form. 761/10354 useless extension candidates. Maximal degree in co-relation 24421. Up to 8274 conditions per place. [2025-01-10 01:10:15,894 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 86 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2025-01-10 01:10:15,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 104 transitions, 784 flow [2025-01-10 01:10:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:10:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:10:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2025-01-10 01:10:15,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3675 [2025-01-10 01:10:15,895 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 363 flow. Second operand 8 states and 147 transitions. [2025-01-10 01:10:15,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 104 transitions, 784 flow [2025-01-10 01:10:15,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 104 transitions, 775 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:15,918 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 413 flow [2025-01-10 01:10:15,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=413, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2025-01-10 01:10:15,919 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2025-01-10 01:10:15,919 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 413 flow [2025-01-10 01:10:15,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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) [2025-01-10 01:10:15,919 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:15,919 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:15,926 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 [2025-01-10 01:10:16,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:16,124 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:16,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:16,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1047194201, now seen corresponding path program 2 times [2025-01-10 01:10:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:16,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341419037] [2025-01-10 01:10:16,124 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:16,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:16,129 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-10 01:10:16,144 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:10:16,145 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:16,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:10:16,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:16,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341419037] [2025-01-10 01:10:16,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341419037] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:16,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726597701] [2025-01-10 01:10:16,327 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:16,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:16,329 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) [2025-01-10 01:10:16,331 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 [2025-01-10 01:10:16,369 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-10 01:10:16,386 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:10:16,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:16,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:16,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-10 01:10:16,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:16,398 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 [2025-01-10 01:10:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:16,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:16,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726597701] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:16,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:16,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2025-01-10 01:10:16,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792861890] [2025-01-10 01:10:16,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:16,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:10:16,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:16,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:10:16,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:10:16,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:16,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 413 flow. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 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) [2025-01-10 01:10:16,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:16,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:16,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:17,725 INFO L124 PetriNetUnfolderBase]: 5751/8408 cut-off events. [2025-01-10 01:10:17,725 INFO L125 PetriNetUnfolderBase]: For 20650/21991 co-relation queries the response was YES. [2025-01-10 01:10:17,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31092 conditions, 8408 events. 5751/8408 cut-off events. For 20650/21991 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 45904 event pairs, 1245 based on Foata normal form. 1109/9511 useless extension candidates. Maximal degree in co-relation 22460. Up to 2806 conditions per place. [2025-01-10 01:10:17,779 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 133 selfloop transitions, 12 changer transitions 0/151 dead transitions. [2025-01-10 01:10:17,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 151 transitions, 1256 flow [2025-01-10 01:10:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:10:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:10:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2025-01-10 01:10:17,780 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37714285714285717 [2025-01-10 01:10:17,780 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 413 flow. Second operand 7 states and 132 transitions. [2025-01-10 01:10:17,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 151 transitions, 1256 flow [2025-01-10 01:10:17,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 151 transitions, 1239 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-01-10 01:10:17,812 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 414 flow [2025-01-10 01:10:17,812 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2025-01-10 01:10:17,814 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2025-01-10 01:10:17,814 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 414 flow [2025-01-10 01:10:17,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 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) [2025-01-10 01:10:17,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:17,814 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:17,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 01:10:18,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:18,018 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:18,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1842458725, now seen corresponding path program 2 times [2025-01-10 01:10:18,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:18,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120907838] [2025-01-10 01:10:18,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:18,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:18,025 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-10 01:10:18,034 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:10:18,034 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:18,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:10:18,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:18,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120907838] [2025-01-10 01:10:18,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120907838] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:18,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323151496] [2025-01-10 01:10:18,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:18,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:18,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:18,199 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) [2025-01-10 01:10:18,200 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 [2025-01-10 01:10:18,245 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-10 01:10:18,261 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:10:18,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:18,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:18,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-10 01:10:18,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:18,277 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 [2025-01-10 01:10:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:10:18,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:10:18,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323151496] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:18,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:18,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-01-10 01:10:18,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821967257] [2025-01-10 01:10:18,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:18,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-10 01:10:18,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:18,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-10 01:10:18,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-01-10 01:10:18,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:18,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 414 flow. Second operand has 17 states, 17 states have (on average 11.294117647058824) internal successors, (192), 17 states have internal predecessors, (192), 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) [2025-01-10 01:10:18,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:18,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:18,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:19,413 INFO L124 PetriNetUnfolderBase]: 5091/7544 cut-off events. [2025-01-10 01:10:19,413 INFO L125 PetriNetUnfolderBase]: For 22304/22659 co-relation queries the response was YES. [2025-01-10 01:10:19,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30090 conditions, 7544 events. 5091/7544 cut-off events. For 22304/22659 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 41693 event pairs, 917 based on Foata normal form. 199/7580 useless extension candidates. Maximal degree in co-relation 23045. Up to 2404 conditions per place. [2025-01-10 01:10:19,448 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 124 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2025-01-10 01:10:19,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 147 transitions, 1199 flow [2025-01-10 01:10:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:10:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:10:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2025-01-10 01:10:19,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38 [2025-01-10 01:10:19,450 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 414 flow. Second operand 8 states and 152 transitions. [2025-01-10 01:10:19,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 147 transitions, 1199 flow [2025-01-10 01:10:19,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 147 transitions, 1127 flow, removed 11 selfloop flow, removed 5 redundant places. [2025-01-10 01:10:19,484 INFO L231 Difference]: Finished difference. Result has 85 places, 65 transitions, 418 flow [2025-01-10 01:10:19,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=85, PETRI_TRANSITIONS=65} [2025-01-10 01:10:19,485 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2025-01-10 01:10:19,485 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 65 transitions, 418 flow [2025-01-10 01:10:19,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.294117647058824) internal successors, (192), 17 states have internal predecessors, (192), 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) [2025-01-10 01:10:19,485 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:19,485 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, 1, 1, 1] [2025-01-10 01:10:19,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-10 01:10:19,685 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,SelfDestructingSolverStorable14 [2025-01-10 01:10:19,686 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:19,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:19,687 INFO L85 PathProgramCache]: Analyzing trace with hash 488216149, now seen corresponding path program 1 times [2025-01-10 01:10:19,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:19,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485619436] [2025-01-10 01:10:19,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:19,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:19,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:10:19,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:10:19,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:19,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:10:19,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:19,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485619436] [2025-01-10 01:10:19,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485619436] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:19,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38576837] [2025-01-10 01:10:19,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:19,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:19,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:19,741 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) [2025-01-10 01:10:19,743 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 [2025-01-10 01:10:19,782 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:10:19,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:10:19,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:19,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:19,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:10:19,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:19,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:19,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38576837] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:19,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:10:19,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-01-10 01:10:19,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773720719] [2025-01-10 01:10:19,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:19,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:10:19,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:19,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:10:19,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:10:19,852 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:19,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 65 transitions, 418 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2025-01-10 01:10:19,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:19,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:19,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:20,206 INFO L124 PetriNetUnfolderBase]: 4057/5987 cut-off events. [2025-01-10 01:10:20,206 INFO L125 PetriNetUnfolderBase]: For 19058/19642 co-relation queries the response was YES. [2025-01-10 01:10:20,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23394 conditions, 5987 events. 4057/5987 cut-off events. For 19058/19642 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 32242 event pairs, 1149 based on Foata normal form. 452/6258 useless extension candidates. Maximal degree in co-relation 17929. Up to 3578 conditions per place. [2025-01-10 01:10:20,233 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 73 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2025-01-10 01:10:20,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 719 flow [2025-01-10 01:10:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:10:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:10:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2025-01-10 01:10:20,234 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.352 [2025-01-10 01:10:20,235 INFO L175 Difference]: Start difference. First operand has 85 places, 65 transitions, 418 flow. Second operand 5 states and 88 transitions. [2025-01-10 01:10:20,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 719 flow [2025-01-10 01:10:20,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 625 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-01-10 01:10:20,250 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 341 flow [2025-01-10 01:10:20,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2025-01-10 01:10:20,251 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2025-01-10 01:10:20,251 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 341 flow [2025-01-10 01:10:20,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2025-01-10 01:10:20,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:20,251 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:20,257 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 [2025-01-10 01:10:20,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-01-10 01:10:20,455 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:20,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1460141375, now seen corresponding path program 1 times [2025-01-10 01:10:20,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:20,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534736219] [2025-01-10 01:10:20,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:20,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:20,460 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-10 01:10:20,467 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:20,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:20,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:20,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:20,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534736219] [2025-01-10 01:10:20,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534736219] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:20,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965285803] [2025-01-10 01:10:20,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:20,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:20,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:20,861 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) [2025-01-10 01:10:20,862 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 [2025-01-10 01:10:20,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-10 01:10:20,924 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:20,924 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:20,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:20,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-10 01:10:20,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:20,960 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 [2025-01-10 01:10:21,298 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 79 treesize of output 55 [2025-01-10 01:10:21,301 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 55 treesize of output 51 [2025-01-10 01:10:21,303 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 51 treesize of output 47 [2025-01-10 01:10:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:21,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:21,646 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 135 treesize of output 131 [2025-01-10 01:10:21,649 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 131 treesize of output 127 [2025-01-10 01:10:22,172 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 100 treesize of output 92 [2025-01-10 01:10:22,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:10:22,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2025-01-10 01:10:22,889 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 117 treesize of output 105 [2025-01-10 01:10:22,898 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-01-10 01:10:22,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2025-01-10 01:10:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:22,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965285803] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:22,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:22,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2025-01-10 01:10:22,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574455343] [2025-01-10 01:10:22,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:22,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-10 01:10:22,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:22,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-10 01:10:22,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2025-01-10 01:10:23,274 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:23,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 341 flow. Second operand has 22 states, 22 states have (on average 12.818181818181818) internal successors, (282), 22 states have internal predecessors, (282), 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) [2025-01-10 01:10:23,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:23,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:23,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:24,425 INFO L124 PetriNetUnfolderBase]: 3565/5571 cut-off events. [2025-01-10 01:10:24,425 INFO L125 PetriNetUnfolderBase]: For 13290/13696 co-relation queries the response was YES. [2025-01-10 01:10:24,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20149 conditions, 5571 events. 3565/5571 cut-off events. For 13290/13696 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 31177 event pairs, 867 based on Foata normal form. 7/5572 useless extension candidates. Maximal degree in co-relation 15826. Up to 4456 conditions per place. [2025-01-10 01:10:24,455 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 81 selfloop transitions, 21 changer transitions 47/157 dead transitions. [2025-01-10 01:10:24,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 157 transitions, 1180 flow [2025-01-10 01:10:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-10 01:10:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-01-10 01:10:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2025-01-10 01:10:24,457 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.355 [2025-01-10 01:10:24,457 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 341 flow. Second operand 16 states and 284 transitions. [2025-01-10 01:10:24,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 157 transitions, 1180 flow [2025-01-10 01:10:24,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 157 transitions, 1152 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:10:24,487 INFO L231 Difference]: Finished difference. Result has 100 places, 74 transitions, 482 flow [2025-01-10 01:10:24,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=482, PETRI_PLACES=100, PETRI_TRANSITIONS=74} [2025-01-10 01:10:24,488 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 48 predicate places. [2025-01-10 01:10:24,488 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 74 transitions, 482 flow [2025-01-10 01:10:24,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.818181818181818) internal successors, (282), 22 states have internal predecessors, (282), 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) [2025-01-10 01:10:24,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:24,488 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:24,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-10 01:10:24,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-10 01:10:24,689 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:24,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1493579889, now seen corresponding path program 2 times [2025-01-10 01:10:24,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:24,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461534768] [2025-01-10 01:10:24,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:24,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:24,693 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:24,701 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:24,701 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:24,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:25,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:25,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461534768] [2025-01-10 01:10:25,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461534768] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:25,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258099658] [2025-01-10 01:10:25,003 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:25,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:25,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:25,006 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) [2025-01-10 01:10:25,008 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 [2025-01-10 01:10:25,050 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:25,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:25,065 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:25,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:25,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-10 01:10:25,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:25,095 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 [2025-01-10 01:10:25,296 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 79 treesize of output 55 [2025-01-10 01:10:25,301 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 55 treesize of output 51 [2025-01-10 01:10:25,302 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 51 treesize of output 47 [2025-01-10 01:10:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:25,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:25,437 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 135 treesize of output 131 [2025-01-10 01:10:25,440 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 131 treesize of output 127 [2025-01-10 01:10:26,061 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 100 treesize of output 92 [2025-01-10 01:10:26,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:10:26,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2025-01-10 01:10:26,687 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 117 treesize of output 105 [2025-01-10 01:10:26,696 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-01-10 01:10:26,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2025-01-10 01:10:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:26,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258099658] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:26,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:26,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2025-01-10 01:10:26,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124233364] [2025-01-10 01:10:26,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:26,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 01:10:26,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:26,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 01:10:26,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2025-01-10 01:10:27,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:27,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 74 transitions, 482 flow. Second operand has 24 states, 24 states have (on average 12.833333333333334) internal successors, (308), 24 states have internal predecessors, (308), 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) [2025-01-10 01:10:27,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:27,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:27,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:28,689 INFO L124 PetriNetUnfolderBase]: 3735/5885 cut-off events. [2025-01-10 01:10:28,690 INFO L125 PetriNetUnfolderBase]: For 15897/16282 co-relation queries the response was YES. [2025-01-10 01:10:28,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22452 conditions, 5885 events. 3735/5885 cut-off events. For 15897/16282 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 33883 event pairs, 1048 based on Foata normal form. 3/5887 useless extension candidates. Maximal degree in co-relation 22412. Up to 4516 conditions per place. [2025-01-10 01:10:28,722 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 113 selfloop transitions, 74 changer transitions 38/233 dead transitions. [2025-01-10 01:10:28,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 233 transitions, 1948 flow [2025-01-10 01:10:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-01-10 01:10:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-01-10 01:10:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 510 transitions. [2025-01-10 01:10:28,724 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31875 [2025-01-10 01:10:28,724 INFO L175 Difference]: Start difference. First operand has 100 places, 74 transitions, 482 flow. Second operand 32 states and 510 transitions. [2025-01-10 01:10:28,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 233 transitions, 1948 flow [2025-01-10 01:10:28,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 233 transitions, 1883 flow, removed 28 selfloop flow, removed 7 redundant places. [2025-01-10 01:10:28,761 INFO L231 Difference]: Finished difference. Result has 137 places, 128 transitions, 1169 flow [2025-01-10 01:10:28,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1169, PETRI_PLACES=137, PETRI_TRANSITIONS=128} [2025-01-10 01:10:28,761 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 85 predicate places. [2025-01-10 01:10:28,761 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 128 transitions, 1169 flow [2025-01-10 01:10:28,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.833333333333334) internal successors, (308), 24 states have internal predecessors, (308), 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) [2025-01-10 01:10:28,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:28,762 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:28,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-10 01:10:28,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-10 01:10:28,962 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:28,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1143595953, now seen corresponding path program 3 times [2025-01-10 01:10:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:28,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557536075] [2025-01-10 01:10:28,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:10:28,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:28,967 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:28,972 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 27 statements. [2025-01-10 01:10:28,972 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-01-10 01:10:28,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:29,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:29,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557536075] [2025-01-10 01:10:29,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557536075] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:29,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:29,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-01-10 01:10:29,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470950665] [2025-01-10 01:10:29,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:29,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:10:29,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:29,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:10:29,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:10:29,325 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:29,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 128 transitions, 1169 flow. Second operand has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 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) [2025-01-10 01:10:29,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:29,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:29,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:29,975 INFO L124 PetriNetUnfolderBase]: 3769/6000 cut-off events. [2025-01-10 01:10:29,975 INFO L125 PetriNetUnfolderBase]: For 23891/24348 co-relation queries the response was YES. [2025-01-10 01:10:29,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25932 conditions, 6000 events. 3769/6000 cut-off events. For 23891/24348 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 35268 event pairs, 913 based on Foata normal form. 51/6045 useless extension candidates. Maximal degree in co-relation 25873. Up to 4916 conditions per place. [2025-01-10 01:10:30,017 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 122 selfloop transitions, 84 changer transitions 10/224 dead transitions. [2025-01-10 01:10:30,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 224 transitions, 2392 flow [2025-01-10 01:10:30,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:10:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:10:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2025-01-10 01:10:30,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2025-01-10 01:10:30,018 INFO L175 Difference]: Start difference. First operand has 137 places, 128 transitions, 1169 flow. Second operand 11 states and 195 transitions. [2025-01-10 01:10:30,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 224 transitions, 2392 flow [2025-01-10 01:10:30,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 224 transitions, 2227 flow, removed 49 selfloop flow, removed 11 redundant places. [2025-01-10 01:10:30,088 INFO L231 Difference]: Finished difference. Result has 138 places, 174 transitions, 1812 flow [2025-01-10 01:10:30,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1812, PETRI_PLACES=138, PETRI_TRANSITIONS=174} [2025-01-10 01:10:30,088 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 86 predicate places. [2025-01-10 01:10:30,088 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 174 transitions, 1812 flow [2025-01-10 01:10:30,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 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) [2025-01-10 01:10:30,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:30,088 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:30,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-01-10 01:10:30,089 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:30,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:30,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1609116849, now seen corresponding path program 4 times [2025-01-10 01:10:30,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:30,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404766204] [2025-01-10 01:10:30,089 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:10:30,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:30,093 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:30,100 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:30,100 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:10:30,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:30,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:30,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404766204] [2025-01-10 01:10:30,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404766204] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:30,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880076352] [2025-01-10 01:10:30,386 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:10:30,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:30,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:30,388 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) [2025-01-10 01:10:30,390 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 [2025-01-10 01:10:30,428 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:30,446 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:30,446 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:10:30,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:30,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-01-10 01:10:30,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:30,473 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 [2025-01-10 01:10:30,724 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 79 treesize of output 55 [2025-01-10 01:10:30,726 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 55 treesize of output 51 [2025-01-10 01:10:30,729 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 51 treesize of output 47 [2025-01-10 01:10:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:30,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:30,886 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 135 treesize of output 131 [2025-01-10 01:10:30,888 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 131 treesize of output 127 [2025-01-10 01:10:31,487 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 68 treesize of output 60 [2025-01-10 01:10:31,489 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 82 treesize of output 74 [2025-01-10 01:10:31,516 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 45 treesize of output 39 [2025-01-10 01:10:31,518 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 56 treesize of output 50 [2025-01-10 01:10:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:31,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880076352] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:31,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:31,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2025-01-10 01:10:31,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183279210] [2025-01-10 01:10:31,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:31,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-10 01:10:31,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:31,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-10 01:10:31,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-01-10 01:10:31,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:31,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 174 transitions, 1812 flow. Second operand has 27 states, 27 states have (on average 11.444444444444445) internal successors, (309), 27 states have internal predecessors, (309), 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) [2025-01-10 01:10:31,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:31,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:31,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:33,376 INFO L124 PetriNetUnfolderBase]: 5677/8828 cut-off events. [2025-01-10 01:10:33,376 INFO L125 PetriNetUnfolderBase]: For 37660/38066 co-relation queries the response was YES. [2025-01-10 01:10:33,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39670 conditions, 8828 events. 5677/8828 cut-off events. For 37660/38066 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 52905 event pairs, 1129 based on Foata normal form. 17/8691 useless extension candidates. Maximal degree in co-relation 39193. Up to 6078 conditions per place. [2025-01-10 01:10:33,440 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 171 selfloop transitions, 161 changer transitions 14/352 dead transitions. [2025-01-10 01:10:33,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 352 transitions, 3843 flow [2025-01-10 01:10:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-10 01:10:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-01-10 01:10:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 393 transitions. [2025-01-10 01:10:33,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3144 [2025-01-10 01:10:33,442 INFO L175 Difference]: Start difference. First operand has 138 places, 174 transitions, 1812 flow. Second operand 25 states and 393 transitions. [2025-01-10 01:10:33,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 352 transitions, 3843 flow [2025-01-10 01:10:33,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 352 transitions, 3772 flow, removed 32 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:33,540 INFO L231 Difference]: Finished difference. Result has 169 places, 251 transitions, 3143 flow [2025-01-10 01:10:33,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3143, PETRI_PLACES=169, PETRI_TRANSITIONS=251} [2025-01-10 01:10:33,540 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 117 predicate places. [2025-01-10 01:10:33,540 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 251 transitions, 3143 flow [2025-01-10 01:10:33,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 11.444444444444445) internal successors, (309), 27 states have internal predecessors, (309), 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) [2025-01-10 01:10:33,541 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:33,541 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:33,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-10 01:10:33,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:33,745 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:33,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash 914314715, now seen corresponding path program 5 times [2025-01-10 01:10:33,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:33,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333938697] [2025-01-10 01:10:33,758 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:10:33,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:33,852 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:33,865 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:33,865 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:33,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:34,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:34,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333938697] [2025-01-10 01:10:34,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333938697] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:34,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574271725] [2025-01-10 01:10:34,379 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:10:34,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:34,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:34,381 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) [2025-01-10 01:10:34,383 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 [2025-01-10 01:10:34,420 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:34,441 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:34,441 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:34,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:34,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-10 01:10:34,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:34,693 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 79 treesize of output 55 [2025-01-10 01:10:34,695 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 55 treesize of output 51 [2025-01-10 01:10:34,696 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 51 treesize of output 47 [2025-01-10 01:10:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:34,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:34,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:10:34,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 88 [2025-01-10 01:10:34,851 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 80 treesize of output 76 [2025-01-10 01:10:34,855 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 76 treesize of output 72 [2025-01-10 01:10:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:35,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574271725] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:35,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:35,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2025-01-10 01:10:35,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654392379] [2025-01-10 01:10:35,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:35,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 01:10:35,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:35,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 01:10:35,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2025-01-10 01:10:35,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:35,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 251 transitions, 3143 flow. Second operand has 24 states, 24 states have (on average 11.875) internal successors, (285), 24 states have internal predecessors, (285), 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) [2025-01-10 01:10:35,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:35,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:35,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:36,600 INFO L124 PetriNetUnfolderBase]: 6835/10553 cut-off events. [2025-01-10 01:10:36,600 INFO L125 PetriNetUnfolderBase]: For 63471/63964 co-relation queries the response was YES. [2025-01-10 01:10:36,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52891 conditions, 10553 events. 6835/10553 cut-off events. For 63471/63964 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 64056 event pairs, 1670 based on Foata normal form. 83/10255 useless extension candidates. Maximal degree in co-relation 52242. Up to 8862 conditions per place. [2025-01-10 01:10:36,682 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 174 selfloop transitions, 77 changer transitions 72/331 dead transitions. [2025-01-10 01:10:36,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 331 transitions, 4640 flow [2025-01-10 01:10:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:10:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:10:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2025-01-10 01:10:36,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33384615384615385 [2025-01-10 01:10:36,683 INFO L175 Difference]: Start difference. First operand has 169 places, 251 transitions, 3143 flow. Second operand 13 states and 217 transitions. [2025-01-10 01:10:36,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 331 transitions, 4640 flow [2025-01-10 01:10:36,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 331 transitions, 4260 flow, removed 134 selfloop flow, removed 7 redundant places. [2025-01-10 01:10:36,998 INFO L231 Difference]: Finished difference. Result has 180 places, 232 transitions, 2720 flow [2025-01-10 01:10:36,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2720, PETRI_PLACES=180, PETRI_TRANSITIONS=232} [2025-01-10 01:10:36,998 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 128 predicate places. [2025-01-10 01:10:36,999 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 232 transitions, 2720 flow [2025-01-10 01:10:36,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.875) internal successors, (285), 24 states have internal predecessors, (285), 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) [2025-01-10 01:10:36,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:36,999 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:37,005 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 [2025-01-10 01:10:37,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:37,199 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:37,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash -636158235, now seen corresponding path program 6 times [2025-01-10 01:10:37,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:37,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194066337] [2025-01-10 01:10:37,200 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:10:37,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:37,207 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:37,218 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:37,218 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-10 01:10:37,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194066337] [2025-01-10 01:10:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194066337] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914185271] [2025-01-10 01:10:37,531 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:10:37,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:37,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:37,535 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) [2025-01-10 01:10:37,537 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 [2025-01-10 01:10:37,576 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:37,594 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:37,594 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-10 01:10:37,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:37,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-10 01:10:37,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:37,633 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 [2025-01-10 01:10:37,818 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 79 treesize of output 55 [2025-01-10 01:10:37,820 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 55 treesize of output 51 [2025-01-10 01:10:37,821 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 51 treesize of output 47 [2025-01-10 01:10:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:37,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:37,964 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 135 treesize of output 131 [2025-01-10 01:10:37,968 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 131 treesize of output 127 [2025-01-10 01:10:38,547 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 53 treesize of output 47 [2025-01-10 01:10:38,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:10:38,555 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 64 treesize of output 58 [2025-01-10 01:10:38,598 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 66 treesize of output 58 [2025-01-10 01:10:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:10:38,603 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2025-01-10 01:10:38,623 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 72 treesize of output 64 [2025-01-10 01:10:38,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:10:38,632 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 86 treesize of output 82 [2025-01-10 01:10:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:38,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914185271] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:38,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:38,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2025-01-10 01:10:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526765919] [2025-01-10 01:10:38,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:38,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 01:10:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:38,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 01:10:38,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2025-01-10 01:10:39,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:39,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 232 transitions, 2720 flow. Second operand has 24 states, 24 states have (on average 12.75) internal successors, (306), 24 states have internal predecessors, (306), 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) [2025-01-10 01:10:39,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:39,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:39,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:40,938 INFO L124 PetriNetUnfolderBase]: 5214/8376 cut-off events. [2025-01-10 01:10:40,938 INFO L125 PetriNetUnfolderBase]: For 43719/44194 co-relation queries the response was YES. [2025-01-10 01:10:40,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40258 conditions, 8376 events. 5214/8376 cut-off events. For 43719/44194 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 52975 event pairs, 1194 based on Foata normal form. 125/8453 useless extension candidates. Maximal degree in co-relation 39825. Up to 6771 conditions per place. [2025-01-10 01:10:41,002 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 166 selfloop transitions, 96 changer transitions 66/338 dead transitions. [2025-01-10 01:10:41,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 338 transitions, 4124 flow [2025-01-10 01:10:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-10 01:10:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-01-10 01:10:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 450 transitions. [2025-01-10 01:10:41,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2025-01-10 01:10:41,005 INFO L175 Difference]: Start difference. First operand has 180 places, 232 transitions, 2720 flow. Second operand 28 states and 450 transitions. [2025-01-10 01:10:41,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 338 transitions, 4124 flow [2025-01-10 01:10:41,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 338 transitions, 3865 flow, removed 27 selfloop flow, removed 12 redundant places. [2025-01-10 01:10:41,163 INFO L231 Difference]: Finished difference. Result has 201 places, 227 transitions, 2649 flow [2025-01-10 01:10:41,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2649, PETRI_PLACES=201, PETRI_TRANSITIONS=227} [2025-01-10 01:10:41,163 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 149 predicate places. [2025-01-10 01:10:41,164 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 227 transitions, 2649 flow [2025-01-10 01:10:41,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.75) internal successors, (306), 24 states have internal predecessors, (306), 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) [2025-01-10 01:10:41,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:41,164 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:41,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-10 01:10:41,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:41,364 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:41,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1770386803, now seen corresponding path program 7 times [2025-01-10 01:10:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:41,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146686850] [2025-01-10 01:10:41,365 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:10:41,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:41,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-10 01:10:41,379 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:41,379 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:41,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:41,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:41,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146686850] [2025-01-10 01:10:41,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146686850] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:41,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586561612] [2025-01-10 01:10:41,609 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:10:41,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:41,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:41,611 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) [2025-01-10 01:10:41,613 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 [2025-01-10 01:10:41,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-10 01:10:41,667 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:41,667 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:41,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:41,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-01-10 01:10:41,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:41,714 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 [2025-01-10 01:10:41,874 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 89 treesize of output 65 [2025-01-10 01:10:41,876 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 65 treesize of output 61 [2025-01-10 01:10:41,877 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 61 treesize of output 57 [2025-01-10 01:10:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:41,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:42,014 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 135 treesize of output 131 [2025-01-10 01:10:42,016 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 131 treesize of output 127 [2025-01-10 01:10:42,595 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 72 treesize of output 64 [2025-01-10 01:10:42,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:10:42,602 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 86 treesize of output 82 [2025-01-10 01:10:42,730 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 53 treesize of output 47 [2025-01-10 01:10:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:10:42,739 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2025-01-10 01:10:42,763 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 66 treesize of output 58 [2025-01-10 01:10:42,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:10:42,772 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2025-01-10 01:10:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:42,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586561612] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:42,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:42,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2025-01-10 01:10:42,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611404620] [2025-01-10 01:10:42,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:42,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-10 01:10:42,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:42,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-10 01:10:42,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2025-01-10 01:10:43,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:43,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 227 transitions, 2649 flow. Second operand has 23 states, 23 states have (on average 12.869565217391305) internal successors, (296), 23 states have internal predecessors, (296), 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) [2025-01-10 01:10:43,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:43,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:43,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:44,683 INFO L124 PetriNetUnfolderBase]: 5135/8203 cut-off events. [2025-01-10 01:10:44,683 INFO L125 PetriNetUnfolderBase]: For 48815/49279 co-relation queries the response was YES. [2025-01-10 01:10:44,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40423 conditions, 8203 events. 5135/8203 cut-off events. For 48815/49279 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51601 event pairs, 1239 based on Foata normal form. 55/8193 useless extension candidates. Maximal degree in co-relation 40320. Up to 6672 conditions per place. [2025-01-10 01:10:44,753 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 171 selfloop transitions, 60 changer transitions 54/295 dead transitions. [2025-01-10 01:10:44,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 295 transitions, 3783 flow [2025-01-10 01:10:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-10 01:10:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-01-10 01:10:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 325 transitions. [2025-01-10 01:10:44,755 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.325 [2025-01-10 01:10:44,755 INFO L175 Difference]: Start difference. First operand has 201 places, 227 transitions, 2649 flow. Second operand 20 states and 325 transitions. [2025-01-10 01:10:44,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 295 transitions, 3783 flow [2025-01-10 01:10:44,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 295 transitions, 3469 flow, removed 62 selfloop flow, removed 21 redundant places. [2025-01-10 01:10:44,898 INFO L231 Difference]: Finished difference. Result has 190 places, 209 transitions, 2162 flow [2025-01-10 01:10:44,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2162, PETRI_PLACES=190, PETRI_TRANSITIONS=209} [2025-01-10 01:10:44,899 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 138 predicate places. [2025-01-10 01:10:44,899 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 209 transitions, 2162 flow [2025-01-10 01:10:44,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.869565217391305) internal successors, (296), 23 states have internal predecessors, (296), 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) [2025-01-10 01:10:44,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:44,899 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:44,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:45,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:45,099 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:45,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:45,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2092190099, now seen corresponding path program 8 times [2025-01-10 01:10:45,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:45,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515851465] [2025-01-10 01:10:45,100 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:45,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:45,104 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:45,107 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 27 statements. [2025-01-10 01:10:45,107 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:10:45,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:45,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:45,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515851465] [2025-01-10 01:10:45,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515851465] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:45,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:45,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-01-10 01:10:45,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173328360] [2025-01-10 01:10:45,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:45,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:10:45,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:45,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:10:45,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:10:45,388 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:45,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 209 transitions, 2162 flow. Second operand has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 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) [2025-01-10 01:10:45,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:45,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:45,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:46,215 INFO L124 PetriNetUnfolderBase]: 5088/8185 cut-off events. [2025-01-10 01:10:46,215 INFO L125 PetriNetUnfolderBase]: For 40892/41382 co-relation queries the response was YES. [2025-01-10 01:10:46,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38543 conditions, 8185 events. 5088/8185 cut-off events. For 40892/41382 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52353 event pairs, 1176 based on Foata normal form. 67/8200 useless extension candidates. Maximal degree in co-relation 38446. Up to 6825 conditions per place. [2025-01-10 01:10:46,275 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 158 selfloop transitions, 79 changer transitions 12/259 dead transitions. [2025-01-10 01:10:46,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 259 transitions, 3026 flow [2025-01-10 01:10:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:10:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:10:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2025-01-10 01:10:46,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3418181818181818 [2025-01-10 01:10:46,276 INFO L175 Difference]: Start difference. First operand has 190 places, 209 transitions, 2162 flow. Second operand 11 states and 188 transitions. [2025-01-10 01:10:46,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 259 transitions, 3026 flow [2025-01-10 01:10:46,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 259 transitions, 2870 flow, removed 8 selfloop flow, removed 17 redundant places. [2025-01-10 01:10:46,384 INFO L231 Difference]: Finished difference. Result has 179 places, 222 transitions, 2402 flow [2025-01-10 01:10:46,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2402, PETRI_PLACES=179, PETRI_TRANSITIONS=222} [2025-01-10 01:10:46,384 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 127 predicate places. [2025-01-10 01:10:46,384 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 222 transitions, 2402 flow [2025-01-10 01:10:46,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 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) [2025-01-10 01:10:46,384 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:46,384 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:46,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-01-10 01:10:46,384 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:46,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1802882749, now seen corresponding path program 9 times [2025-01-10 01:10:46,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:46,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690493210] [2025-01-10 01:10:46,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:10:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:46,391 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:46,395 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:46,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:10:46,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:46,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:46,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690493210] [2025-01-10 01:10:46,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690493210] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:46,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618345376] [2025-01-10 01:10:46,647 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:10:46,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:46,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:46,649 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) [2025-01-10 01:10:46,649 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 [2025-01-10 01:10:46,685 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:10:46,698 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:10:46,699 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:10:46,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:46,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-10 01:10:46,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:46,728 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 [2025-01-10 01:10:46,897 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 79 treesize of output 55 [2025-01-10 01:10:46,899 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 55 treesize of output 51 [2025-01-10 01:10:46,900 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 51 treesize of output 47 [2025-01-10 01:10:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:46,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:47,040 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 116 treesize of output 112 [2025-01-10 01:10:47,041 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 112 treesize of output 108 [2025-01-10 01:10:47,495 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 53 treesize of output 47 [2025-01-10 01:10:47,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:10:47,503 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 64 treesize of output 58 [2025-01-10 01:10:47,547 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 66 treesize of output 58 [2025-01-10 01:10:47,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:10:47,553 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2025-01-10 01:10:47,571 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 72 treesize of output 64 [2025-01-10 01:10:47,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:10:47,583 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 86 treesize of output 82 [2025-01-10 01:10:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:47,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618345376] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:47,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:47,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2025-01-10 01:10:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044260210] [2025-01-10 01:10:47,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:47,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-10 01:10:47,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:47,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-10 01:10:47,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2025-01-10 01:10:47,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-01-10 01:10:47,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 222 transitions, 2402 flow. Second operand has 25 states, 25 states have (on average 12.68) internal successors, (317), 25 states have internal predecessors, (317), 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) [2025-01-10 01:10:47,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:47,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-01-10 01:10:47,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:49,912 INFO L124 PetriNetUnfolderBase]: 5551/8892 cut-off events. [2025-01-10 01:10:49,912 INFO L125 PetriNetUnfolderBase]: For 52949/53575 co-relation queries the response was YES. [2025-01-10 01:10:49,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43633 conditions, 8892 events. 5551/8892 cut-off events. For 52949/53575 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 57387 event pairs, 1094 based on Foata normal form. 158/9000 useless extension candidates. Maximal degree in co-relation 43220. Up to 6248 conditions per place. [2025-01-10 01:10:49,986 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 173 selfloop transitions, 128 changer transitions 57/368 dead transitions. [2025-01-10 01:10:49,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 368 transitions, 4118 flow [2025-01-10 01:10:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-01-10 01:10:49,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-01-10 01:10:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 493 transitions. [2025-01-10 01:10:49,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32866666666666666 [2025-01-10 01:10:49,988 INFO L175 Difference]: Start difference. First operand has 179 places, 222 transitions, 2402 flow. Second operand 30 states and 493 transitions. [2025-01-10 01:10:49,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 368 transitions, 4118 flow [2025-01-10 01:10:50,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 368 transitions, 4019 flow, removed 27 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:50,171 INFO L231 Difference]: Finished difference. Result has 210 places, 232 transitions, 2731 flow [2025-01-10 01:10:50,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2731, PETRI_PLACES=210, PETRI_TRANSITIONS=232} [2025-01-10 01:10:50,172 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 158 predicate places. [2025-01-10 01:10:50,172 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 232 transitions, 2731 flow [2025-01-10 01:10:50,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.68) internal successors, (317), 25 states have internal predecessors, (317), 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) [2025-01-10 01:10:50,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:50,172 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, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:50,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-01-10 01:10:50,373 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,SelfDestructingSolverStorable24 [2025-01-10 01:10:50,373 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:50,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:50,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1414618561, now seen corresponding path program 10 times [2025-01-10 01:10:50,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:50,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833040514] [2025-01-10 01:10:50,375 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:10:50,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:50,381 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-01-10 01:10:50,393 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:10:50,393 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:10:50,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:50,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:50,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833040514] [2025-01-10 01:10:50,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833040514] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:50,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634134977] [2025-01-10 01:10:50,442 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:10:50,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:50,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:50,444 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) [2025-01-10 01:10:50,445 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 [2025-01-10 01:10:50,485 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-01-10 01:10:50,504 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:10:50,505 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:10:50,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:50,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:10:50,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:50,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:50,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634134977] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:50,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:50,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-01-10 01:10:50,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117610251] [2025-01-10 01:10:50,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:50,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:10:50,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:50,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:10:50,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:10:50,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-01-10 01:10:50,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 232 transitions, 2731 flow. Second operand has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 13 states have internal predecessors, (157), 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) [2025-01-10 01:10:50,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:50,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-01-10 01:10:50,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:51,749 INFO L124 PetriNetUnfolderBase]: 7741/11542 cut-off events. [2025-01-10 01:10:51,749 INFO L125 PetriNetUnfolderBase]: For 80565/81543 co-relation queries the response was YES. [2025-01-10 01:10:51,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60183 conditions, 11542 events. 7741/11542 cut-off events. For 80565/81543 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 69203 event pairs, 766 based on Foata normal form. 340/11522 useless extension candidates. Maximal degree in co-relation 60120. Up to 3800 conditions per place. [2025-01-10 01:10:51,821 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 267 selfloop transitions, 36 changer transitions 0/310 dead transitions. [2025-01-10 01:10:51,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 310 transitions, 3895 flow [2025-01-10 01:10:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:10:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:10:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2025-01-10 01:10:51,822 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3488888888888889 [2025-01-10 01:10:51,822 INFO L175 Difference]: Start difference. First operand has 210 places, 232 transitions, 2731 flow. Second operand 9 states and 157 transitions. [2025-01-10 01:10:51,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 310 transitions, 3895 flow [2025-01-10 01:10:52,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 310 transitions, 3134 flow, removed 166 selfloop flow, removed 40 redundant places. [2025-01-10 01:10:52,153 INFO L231 Difference]: Finished difference. Result has 161 places, 234 transitions, 2136 flow [2025-01-10 01:10:52,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2136, PETRI_PLACES=161, PETRI_TRANSITIONS=234} [2025-01-10 01:10:52,154 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 109 predicate places. [2025-01-10 01:10:52,154 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 234 transitions, 2136 flow [2025-01-10 01:10:52,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 13 states have internal predecessors, (157), 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) [2025-01-10 01:10:52,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:52,154 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:52,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-01-10 01:10:52,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:52,354 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:52,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1906399989, now seen corresponding path program 11 times [2025-01-10 01:10:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:52,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446024898] [2025-01-10 01:10:52,355 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:10:52,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:52,359 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 3 equivalence classes. [2025-01-10 01:10:52,362 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:10:52,362 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:10:52,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:52,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:52,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446024898] [2025-01-10 01:10:52,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446024898] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:52,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336683039] [2025-01-10 01:10:52,417 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:10:52,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:52,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:52,419 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) [2025-01-10 01:10:52,420 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 [2025-01-10 01:10:52,457 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 3 equivalence classes. [2025-01-10 01:10:52,472 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:10:52,472 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:10:52,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:52,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:10:52,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:52,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:52,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336683039] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:52,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:52,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-01-10 01:10:52,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292843313] [2025-01-10 01:10:52,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:52,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 01:10:52,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:52,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 01:10:52,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2025-01-10 01:10:52,598 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2025-01-10 01:10:52,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 234 transitions, 2136 flow. Second operand has 18 states, 18 states have (on average 9.777777777777779) internal successors, (176), 18 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) [2025-01-10 01:10:52,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:52,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2025-01-10 01:10:52,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:55,553 INFO L124 PetriNetUnfolderBase]: 21518/30688 cut-off events. [2025-01-10 01:10:55,554 INFO L125 PetriNetUnfolderBase]: For 155353/155353 co-relation queries the response was YES. [2025-01-10 01:10:55,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146110 conditions, 30688 events. 21518/30688 cut-off events. For 155353/155353 co-relation queries the response was YES. Maximal size of possible extension queue 873. Compared 181399 event pairs, 2352 based on Foata normal form. 0/29943 useless extension candidates. Maximal degree in co-relation 146067. Up to 9559 conditions per place. [2025-01-10 01:10:55,773 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 855 selfloop transitions, 215 changer transitions 0/1071 dead transitions. [2025-01-10 01:10:55,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1071 transitions, 11753 flow [2025-01-10 01:10:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-01-10 01:10:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-01-10 01:10:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 570 transitions. [2025-01-10 01:10:55,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32571428571428573 [2025-01-10 01:10:55,774 INFO L175 Difference]: Start difference. First operand has 161 places, 234 transitions, 2136 flow. Second operand 35 states and 570 transitions. [2025-01-10 01:10:55,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1071 transitions, 11753 flow [2025-01-10 01:10:56,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 1071 transitions, 11592 flow, removed 23 selfloop flow, removed 5 redundant places. [2025-01-10 01:10:56,436 INFO L231 Difference]: Finished difference. Result has 213 places, 449 transitions, 4618 flow [2025-01-10 01:10:56,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2098, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4618, PETRI_PLACES=213, PETRI_TRANSITIONS=449} [2025-01-10 01:10:56,436 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 161 predicate places. [2025-01-10 01:10:56,436 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 449 transitions, 4618 flow [2025-01-10 01:10:56,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.777777777777779) internal successors, (176), 18 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) [2025-01-10 01:10:56,437 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:56,437 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:56,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:56,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-01-10 01:10:56,637 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:10:56,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1511843217, now seen corresponding path program 12 times [2025-01-10 01:10:56,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:56,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434202644] [2025-01-10 01:10:56,638 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:10:56,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:56,642 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-01-10 01:10:56,724 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:10:56,724 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:10:56,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:56,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:56,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434202644] [2025-01-10 01:10:56,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434202644] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:56,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237908408] [2025-01-10 01:10:56,788 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:10:56,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:56,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:56,790 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) [2025-01-10 01:10:56,791 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 [2025-01-10 01:10:56,834 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-01-10 01:10:56,851 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:10:56,851 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:10:56,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:56,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:10:56,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:56,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:56,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237908408] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:56,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:56,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-01-10 01:10:56,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472875441] [2025-01-10 01:10:56,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:56,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-10 01:10:56,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:56,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-10 01:10:56,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2025-01-10 01:10:56,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2025-01-10 01:10:56,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 449 transitions, 4618 flow. Second operand has 17 states, 17 states have (on average 10.117647058823529) internal successors, (172), 17 states have internal predecessors, (172), 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) [2025-01-10 01:10:56,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:56,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2025-01-10 01:10:56,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:11:04,303 INFO L124 PetriNetUnfolderBase]: 35680/50533 cut-off events. [2025-01-10 01:11:04,303 INFO L125 PetriNetUnfolderBase]: For 487368/487368 co-relation queries the response was YES. [2025-01-10 01:11:04,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300094 conditions, 50533 events. 35680/50533 cut-off events. For 487368/487368 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 309195 event pairs, 597 based on Foata normal form. 0/49076 useless extension candidates. Maximal degree in co-relation 300029. Up to 15548 conditions per place. [2025-01-10 01:11:04,971 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 1210 selfloop transitions, 715 changer transitions 0/1926 dead transitions. [2025-01-10 01:11:04,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1926 transitions, 22846 flow [2025-01-10 01:11:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2025-01-10 01:11:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2025-01-10 01:11:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 1207 transitions. [2025-01-10 01:11:04,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3262162162162162 [2025-01-10 01:11:04,973 INFO L175 Difference]: Start difference. First operand has 213 places, 449 transitions, 4618 flow. Second operand 74 states and 1207 transitions. [2025-01-10 01:11:04,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1926 transitions, 22846 flow [2025-01-10 01:11:08,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1926 transitions, 22250 flow, removed 137 selfloop flow, removed 2 redundant places. [2025-01-10 01:11:08,619 INFO L231 Difference]: Finished difference. Result has 321 places, 1021 transitions, 12010 flow [2025-01-10 01:11:08,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=12010, PETRI_PLACES=321, PETRI_TRANSITIONS=1021} [2025-01-10 01:11:08,619 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 269 predicate places. [2025-01-10 01:11:08,619 INFO L471 AbstractCegarLoop]: Abstraction has has 321 places, 1021 transitions, 12010 flow [2025-01-10 01:11:08,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.117647058823529) internal successors, (172), 17 states have internal predecessors, (172), 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) [2025-01-10 01:11:08,620 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:11:08,620 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:11:08,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-01-10 01:11:08,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-01-10 01:11:08,820 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:11:08,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:11:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2084233793, now seen corresponding path program 13 times [2025-01-10 01:11:08,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:11:08,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328303696] [2025-01-10 01:11:08,821 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:11:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:11:08,824 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-10 01:11:08,827 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:11:08,827 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:11:08,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:11:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:11:08,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:11:08,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328303696] [2025-01-10 01:11:08,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328303696] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:11:08,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088200416] [2025-01-10 01:11:08,898 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:11:08,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:11:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:11:08,900 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:11:08,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-01-10 01:11:08,941 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-10 01:11:08,955 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:11:08,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:11:08,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:11:08,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:11:08,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:11:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:11:09,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:11:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:11:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088200416] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:11:09,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:11:09,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-01-10 01:11:09,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144162236] [2025-01-10 01:11:09,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:11:09,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 01:11:09,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:11:09,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 01:11:09,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-01-10 01:11:09,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2025-01-10 01:11:09,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1021 transitions, 12010 flow. Second operand has 19 states, 19 states have (on average 10.421052631578947) internal successors, (198), 19 states have internal predecessors, (198), 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) [2025-01-10 01:11:09,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:11:09,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2025-01-10 01:11:09,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:11:18,691 INFO L124 PetriNetUnfolderBase]: 37846/54912 cut-off events. [2025-01-10 01:11:18,691 INFO L125 PetriNetUnfolderBase]: For 745808/745874 co-relation queries the response was YES. [2025-01-10 01:11:19,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368669 conditions, 54912 events. 37846/54912 cut-off events. For 745808/745874 co-relation queries the response was YES. Maximal size of possible extension queue 1671. Compared 370178 event pairs, 2634 based on Foata normal form. 36/54288 useless extension candidates. Maximal degree in co-relation 368567. Up to 19338 conditions per place. [2025-01-10 01:11:19,896 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 862 selfloop transitions, 972 changer transitions 0/1855 dead transitions. [2025-01-10 01:11:19,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1855 transitions, 25600 flow [2025-01-10 01:11:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-10 01:11:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-01-10 01:11:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 314 transitions. [2025-01-10 01:11:19,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3488888888888889 [2025-01-10 01:11:19,898 INFO L175 Difference]: Start difference. First operand has 321 places, 1021 transitions, 12010 flow. Second operand 18 states and 314 transitions. [2025-01-10 01:11:19,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1855 transitions, 25600 flow [2025-01-10 01:11:29,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1855 transitions, 24663 flow, removed 411 selfloop flow, removed 1 redundant places. [2025-01-10 01:11:29,327 INFO L231 Difference]: Finished difference. Result has 341 places, 1397 transitions, 18437 flow [2025-01-10 01:11:29,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=11262, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=613, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18437, PETRI_PLACES=341, PETRI_TRANSITIONS=1397} [2025-01-10 01:11:29,328 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 289 predicate places. [2025-01-10 01:11:29,328 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 1397 transitions, 18437 flow [2025-01-10 01:11:29,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.421052631578947) internal successors, (198), 19 states have internal predecessors, (198), 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) [2025-01-10 01:11:29,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:11:29,328 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:11:29,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-01-10 01:11:29,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-01-10 01:11:29,529 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-01-10 01:11:29,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:11:29,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1521265399, now seen corresponding path program 14 times [2025-01-10 01:11:29,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:11:29,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530993365] [2025-01-10 01:11:29,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:11:29,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:11:29,533 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-10 01:11:29,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:11:29,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:11:29,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:11:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:11:29,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:11:29,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530993365] [2025-01-10 01:11:29,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530993365] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:11:29,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651011271] [2025-01-10 01:11:29,594 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:11:29,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:11:29,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:11:29,597 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:11:29,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-01-10 01:11:29,639 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-10 01:11:29,656 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:11:29,656 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:11:29,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:11:29,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:11:29,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:11:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:11:29,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:11:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:11:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651011271] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:11:29,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:11:29,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-01-10 01:11:29,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594497917] [2025-01-10 01:11:29,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:11:29,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 01:11:29,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:11:29,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 01:11:29,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2025-01-10 01:11:29,846 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2025-01-10 01:11:29,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1397 transitions, 18437 flow. Second operand has 18 states, 18 states have (on average 10.5) internal successors, (189), 18 states have internal predecessors, (189), 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) [2025-01-10 01:11:29,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:11:29,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2025-01-10 01:11:29,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand