./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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-bad-counter-queue2.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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:06:47,399 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:06:47,450 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:06:47,456 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:06:47,456 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:06:47,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:06:47,477 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:06:47,477 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:06:47,477 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:06:47,477 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:06:47,478 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:06:47,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:06:47,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:06:47,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:06:47,478 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:06:47,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:06:47,478 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:06:47,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:06:47,479 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:06:47,479 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:06:47,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:06:47,479 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:06:47,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:06:47,480 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:06:47,480 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:06:47,480 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:06:47,480 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:06:47,480 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 -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2025-01-10 01:06:47,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:06:47,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:06:47,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:06:47,714 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:06:47,715 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:06:47,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-01-10 01:06:48,860 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b8b96ab36/104842f111444c5d832bc68087fdb385/FLAGe713a3fa6 [2025-01-10 01:06:49,144 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:06:49,144 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-01-10 01:06:49,150 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b8b96ab36/104842f111444c5d832bc68087fdb385/FLAGe713a3fa6 [2025-01-10 01:06:49,160 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b8b96ab36/104842f111444c5d832bc68087fdb385 [2025-01-10 01:06:49,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:06:49,163 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:06:49,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:06:49,164 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:06:49,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:06:49,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e88f66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49, skipping insertion in model container [2025-01-10 01:06:49,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,181 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:06:49,295 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 01:06:49,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:06:49,308 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:06:49,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:06:49,336 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:06:49,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49 WrapperNode [2025-01-10 01:06:49,338 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:06:49,343 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:06:49,343 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:06:49,343 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:06:49,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,353 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,368 INFO L138 Inliner]: procedures = 25, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 125 [2025-01-10 01:06:49,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:06:49,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:06:49,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:06:49,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:06:49,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,378 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,387 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-10 01:06:49,388 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,388 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,392 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,393 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,396 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,397 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:06:49,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:06:49,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:06:49,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:06:49,400 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (1/1) ... [2025-01-10 01:06:49,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:06:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:49,427 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 01:06:49,429 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 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:06:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:06:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:06:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:06:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:06:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:06:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:06:49,447 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 01:06:49,531 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:06:49,533 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:06:49,789 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:06:49,789 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:06:49,957 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:06:49,957 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:06:49,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:06:49 BoogieIcfgContainer [2025-01-10 01:06:49,959 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:06:49,961 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:06:49,961 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:06:49,964 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:06:49,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:06:49" (1/3) ... [2025-01-10 01:06:49,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fd7cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:06:49, skipping insertion in model container [2025-01-10 01:06:49,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:49" (2/3) ... [2025-01-10 01:06:49,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fd7cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:06:49, skipping insertion in model container [2025-01-10 01:06:49,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:06:49" (3/3) ... [2025-01-10 01:06:49,966 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2025-01-10 01:06:49,976 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:06:49,977 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue2.wvr.c that has 3 procedures, 31 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-01-10 01:06:49,977 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:06:50,019 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-10 01:06:50,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 80 flow [2025-01-10 01:06:50,077 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2025-01-10 01:06:50,080 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 01:06:50,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 3/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 56 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-01-10 01:06:50,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 80 flow [2025-01-10 01:06:50,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 30 transitions, 72 flow [2025-01-10 01:06:50,095 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:06:50,105 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;@38c213f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:06:50,106 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-01-10 01:06:50,110 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:06:50,110 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2025-01-10 01:06:50,110 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:06:50,111 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:50,111 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:06:50,111 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:50,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash 435119, now seen corresponding path program 1 times [2025-01-10 01:06:50,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:50,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113545842] [2025-01-10 01:06:50,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:50,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:50,184 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:06:50,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:06:50,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:50,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:50,311 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 01:06:50,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:50,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113545842] [2025-01-10 01:06:50,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113545842] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:50,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:50,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:06:50,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137060868] [2025-01-10 01:06:50,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:50,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:06:50,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:50,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:06:50,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:06:50,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:50,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 01:06:50,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:50,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:50,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:50,478 INFO L124 PetriNetUnfolderBase]: 128/238 cut-off events. [2025-01-10 01:06:50,478 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-01-10 01:06:50,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 238 events. 128/238 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 978 event pairs, 100 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 433. Up to 221 conditions per place. [2025-01-10 01:06:50,481 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 21 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2025-01-10 01:06:50,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 112 flow [2025-01-10 01:06:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:06:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:06:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2025-01-10 01:06:50,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2025-01-10 01:06:50,491 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 46 transitions. [2025-01-10 01:06:50,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 112 flow [2025-01-10 01:06:50,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:50,497 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 62 flow [2025-01-10 01:06:50,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2025-01-10 01:06:50,501 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2025-01-10 01:06:50,501 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 62 flow [2025-01-10 01:06:50,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 01:06:50,501 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:50,501 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:06:50,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:06:50,502 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:50,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash 435120, now seen corresponding path program 1 times [2025-01-10 01:06:50,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:50,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095996264] [2025-01-10 01:06:50,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:50,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:50,507 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:06:50,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:06:50,527 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:50,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:50,757 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 01:06:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095996264] [2025-01-10 01:06:50,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095996264] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:50,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:50,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:06:50,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488984313] [2025-01-10 01:06:50,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:50,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:06:50,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:50,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:06:50,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:06:50,765 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:50,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:50,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:50,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:50,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:50,904 INFO L124 PetriNetUnfolderBase]: 129/241 cut-off events. [2025-01-10 01:06:50,904 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-01-10 01:06:50,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 241 events. 129/241 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 976 event pairs, 100 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 459. Up to 226 conditions per place. [2025-01-10 01:06:50,906 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 23 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2025-01-10 01:06:50,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2025-01-10 01:06:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:06:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:06:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2025-01-10 01:06:50,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2025-01-10 01:06:50,907 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 62 flow. Second operand 4 states and 56 transitions. [2025-01-10 01:06:50,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2025-01-10 01:06:50,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:06:50,909 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 85 flow [2025-01-10 01:06:50,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=85, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2025-01-10 01:06:50,909 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2025-01-10 01:06:50,909 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 85 flow [2025-01-10 01:06:50,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:50,909 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:50,910 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-01-10 01:06:50,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:06:50,910 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:50,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:50,910 INFO L85 PathProgramCache]: Analyzing trace with hash 418163561, now seen corresponding path program 1 times [2025-01-10 01:06:50,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:50,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729557034] [2025-01-10 01:06:50,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:50,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:50,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:06:50,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:06:50,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:50,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:51,175 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 01:06:51,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:51,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729557034] [2025-01-10 01:06:51,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729557034] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:51,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235113525] [2025-01-10 01:06:51,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:51,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:51,179 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 01:06:51,182 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 01:06:51,219 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:06:51,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:06:51,228 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:51,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:51,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 01:06:51,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:51,289 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 01:06:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:51,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:51,518 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 01:06:51,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235113525] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:51,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:51,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-01-10 01:06:51,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969673777] [2025-01-10 01:06:51,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:51,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:06:51,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:51,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:06:51,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:06:51,549 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:51,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 85 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 01:06:51,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:51,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:51,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:51,797 INFO L124 PetriNetUnfolderBase]: 129/240 cut-off events. [2025-01-10 01:06:51,797 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-01-10 01:06:51,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 240 events. 129/240 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 975 event pairs, 100 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 466. Up to 222 conditions per place. [2025-01-10 01:06:51,799 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 19 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2025-01-10 01:06:51,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 133 flow [2025-01-10 01:06:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:06:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:06:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2025-01-10 01:06:51,801 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2025-01-10 01:06:51,801 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 85 flow. Second operand 6 states and 69 transitions. [2025-01-10 01:06:51,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 133 flow [2025-01-10 01:06:51,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:06:51,803 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 92 flow [2025-01-10 01:06:51,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2025-01-10 01:06:51,803 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2025-01-10 01:06:51,803 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 92 flow [2025-01-10 01:06:51,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 01:06:51,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:51,804 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:06:51,812 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 01:06:52,004 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 01:06:52,005 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:52,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash 77837495, now seen corresponding path program 1 times [2025-01-10 01:06:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:52,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533668543] [2025-01-10 01:06:52,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:52,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:06:52,016 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:06:52,016 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:52,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:52,060 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 01:06:52,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:52,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533668543] [2025-01-10 01:06:52,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533668543] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:52,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:52,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:06:52,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48687062] [2025-01-10 01:06:52,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:52,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:06:52,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:52,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:06:52,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:06:52,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:52,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 01:06:52,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:52,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:52,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:52,126 INFO L124 PetriNetUnfolderBase]: 93/177 cut-off events. [2025-01-10 01:06:52,126 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-01-10 01:06:52,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 177 events. 93/177 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 619 event pairs, 68 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 342. Up to 160 conditions per place. [2025-01-10 01:06:52,127 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2025-01-10 01:06:52,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 136 flow [2025-01-10 01:06:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:06:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:06:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2025-01-10 01:06:52,128 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2025-01-10 01:06:52,129 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 92 flow. Second operand 4 states and 51 transitions. [2025-01-10 01:06:52,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 136 flow [2025-01-10 01:06:52,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 106 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-01-10 01:06:52,130 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 64 flow [2025-01-10 01:06:52,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2025-01-10 01:06:52,131 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2025-01-10 01:06:52,131 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 64 flow [2025-01-10 01:06:52,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 01:06:52,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:52,131 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:06:52,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-10 01:06:52,131 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:52,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash 77837496, now seen corresponding path program 1 times [2025-01-10 01:06:52,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:52,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761669190] [2025-01-10 01:06:52,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:52,137 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:06:52,141 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:06:52,141 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:52,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:52,214 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 01:06:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761669190] [2025-01-10 01:06:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761669190] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:52,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:52,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:06:52,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846218639] [2025-01-10 01:06:52,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:52,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:06:52,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:52,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:06:52,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:06:52,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:52,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:52,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:52,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:52,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:52,319 INFO L124 PetriNetUnfolderBase]: 154/292 cut-off events. [2025-01-10 01:06:52,319 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 01:06:52,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 292 events. 154/292 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1171 event pairs, 106 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 388. Up to 192 conditions per place. [2025-01-10 01:06:52,321 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 42 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2025-01-10 01:06:52,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 207 flow [2025-01-10 01:06:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:06:52,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:06:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2025-01-10 01:06:52,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2025-01-10 01:06:52,322 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 64 flow. Second operand 5 states and 83 transitions. [2025-01-10 01:06:52,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 207 flow [2025-01-10 01:06:52,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:06:52,323 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 85 flow [2025-01-10 01:06:52,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=85, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2025-01-10 01:06:52,324 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2025-01-10 01:06:52,324 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 85 flow [2025-01-10 01:06:52,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:52,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:52,324 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:52,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-10 01:06:52,324 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:52,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:52,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2105566815, now seen corresponding path program 1 times [2025-01-10 01:06:52,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:52,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179233393] [2025-01-10 01:06:52,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:52,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:52,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:06:52,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:06:52,334 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:52,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:52,448 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 01:06:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179233393] [2025-01-10 01:06:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179233393] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010318906] [2025-01-10 01:06:52,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:52,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:52,451 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 01:06:52,454 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 01:06:52,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:06:52,510 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:06:52,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:52,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:52,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:06:52,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:52,556 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 01:06:52,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:52,596 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 01:06:52,611 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 01:06:52,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010318906] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:52,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:52,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-01-10 01:06:52,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206173724] [2025-01-10 01:06:52,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:52,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:06:52,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:52,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:06:52,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:06:52,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:06:52,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 85 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 01:06:52,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:52,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:06:52,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:52,826 INFO L124 PetriNetUnfolderBase]: 183/343 cut-off events. [2025-01-10 01:06:52,826 INFO L125 PetriNetUnfolderBase]: For 93/105 co-relation queries the response was YES. [2025-01-10 01:06:52,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 343 events. 183/343 cut-off events. For 93/105 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1404 event pairs, 81 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 534. Up to 142 conditions per place. [2025-01-10 01:06:52,829 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 48 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2025-01-10 01:06:52,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 269 flow [2025-01-10 01:06:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:06:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:06:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2025-01-10 01:06:52,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2025-01-10 01:06:52,830 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 85 flow. Second operand 7 states and 114 transitions. [2025-01-10 01:06:52,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 269 flow [2025-01-10 01:06:52,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:06:52,832 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 121 flow [2025-01-10 01:06:52,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2025-01-10 01:06:52,832 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2025-01-10 01:06:52,832 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 121 flow [2025-01-10 01:06:52,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 01:06:52,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:52,833 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:52,839 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 01:06:53,033 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 01:06:53,034 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:53,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1773970145, now seen corresponding path program 1 times [2025-01-10 01:06:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:53,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348733647] [2025-01-10 01:06:53,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:53,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:53,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:06:53,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:06:53,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:53,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:53,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:53,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348733647] [2025-01-10 01:06:53,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348733647] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:53,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:53,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:06:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621207428] [2025-01-10 01:06:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:53,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:06:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:53,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:06:53,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:06:53,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:53,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 01:06:53,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:53,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:53,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:53,205 INFO L124 PetriNetUnfolderBase]: 184/334 cut-off events. [2025-01-10 01:06:53,205 INFO L125 PetriNetUnfolderBase]: For 364/384 co-relation queries the response was YES. [2025-01-10 01:06:53,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 334 events. 184/334 cut-off events. For 364/384 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1216 event pairs, 132 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 767. Up to 272 conditions per place. [2025-01-10 01:06:53,208 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 38 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2025-01-10 01:06:53,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 246 flow [2025-01-10 01:06:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:06:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:06:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2025-01-10 01:06:53,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2025-01-10 01:06:53,210 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 121 flow. Second operand 5 states and 76 transitions. [2025-01-10 01:06:53,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 246 flow [2025-01-10 01:06:53,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 232 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:53,215 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 134 flow [2025-01-10 01:06:53,215 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2025-01-10 01:06:53,216 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2025-01-10 01:06:53,216 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 134 flow [2025-01-10 01:06:53,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 01:06:53,216 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:53,216 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:53,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-10 01:06:53,217 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:53,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash 506693320, now seen corresponding path program 1 times [2025-01-10 01:06:53,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:53,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279921243] [2025-01-10 01:06:53,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:53,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:53,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 01:06:53,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 01:06:53,231 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:53,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:53,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:53,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279921243] [2025-01-10 01:06:53,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279921243] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:53,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359786327] [2025-01-10 01:06:53,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:53,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:53,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:53,337 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 01:06:53,337 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 01:06:53,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 01:06:53,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 01:06:53,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:53,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:53,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:06:53,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:53,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:53,496 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 01:06:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359786327] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:53,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:53,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-10 01:06:53,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699387011] [2025-01-10 01:06:53,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:53,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:06:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:53,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:06:53,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:06:53,535 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:06:53,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 134 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:53,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:53,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:06:53,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:53,760 INFO L124 PetriNetUnfolderBase]: 223/415 cut-off events. [2025-01-10 01:06:53,761 INFO L125 PetriNetUnfolderBase]: For 372/397 co-relation queries the response was YES. [2025-01-10 01:06:53,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 415 events. 223/415 cut-off events. For 372/397 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1608 event pairs, 100 based on Foata normal form. 0/397 useless extension candidates. Maximal degree in co-relation 996. Up to 205 conditions per place. [2025-01-10 01:06:53,763 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 52 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2025-01-10 01:06:53,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 380 flow [2025-01-10 01:06:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:06:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:06:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2025-01-10 01:06:53,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47186147186147187 [2025-01-10 01:06:53,765 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 134 flow. Second operand 7 states and 109 transitions. [2025-01-10 01:06:53,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 380 flow [2025-01-10 01:06:53,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:06:53,767 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 170 flow [2025-01-10 01:06:53,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2025-01-10 01:06:53,773 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2025-01-10 01:06:53,773 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 170 flow [2025-01-10 01:06:53,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:53,773 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:53,773 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:53,780 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 01:06:53,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:53,974 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:53,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1055929693, now seen corresponding path program 1 times [2025-01-10 01:06:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:53,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191055966] [2025-01-10 01:06:53,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:53,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:53,980 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:06:53,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:06:53,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:53,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:54,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:54,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191055966] [2025-01-10 01:06:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191055966] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:54,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91010529] [2025-01-10 01:06:54,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:54,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:54,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:54,056 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 01:06:54,059 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 01:06:54,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:06:54,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:06:54,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:54,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:54,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:06:54,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:54,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:54,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91010529] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:54,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:54,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-10 01:06:54,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797694661] [2025-01-10 01:06:54,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:54,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:06:54,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:54,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:06:54,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:06:54,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:54,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 170 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 01:06:54,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:54,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:54,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:54,476 INFO L124 PetriNetUnfolderBase]: 432/769 cut-off events. [2025-01-10 01:06:54,477 INFO L125 PetriNetUnfolderBase]: For 908/930 co-relation queries the response was YES. [2025-01-10 01:06:54,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 769 events. 432/769 cut-off events. For 908/930 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3295 event pairs, 226 based on Foata normal form. 16/785 useless extension candidates. Maximal degree in co-relation 1416. Up to 407 conditions per place. [2025-01-10 01:06:54,482 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 70 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2025-01-10 01:06:54,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 85 transitions, 564 flow [2025-01-10 01:06:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:06:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:06:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2025-01-10 01:06:54,484 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2025-01-10 01:06:54,485 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 170 flow. Second operand 8 states and 119 transitions. [2025-01-10 01:06:54,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 85 transitions, 564 flow [2025-01-10 01:06:54,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 85 transitions, 543 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:54,490 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 256 flow [2025-01-10 01:06:54,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2025-01-10 01:06:54,491 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2025-01-10 01:06:54,491 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 256 flow [2025-01-10 01:06:54,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 01:06:54,491 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:54,491 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:54,499 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 01:06:54,691 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,SelfDestructingSolverStorable8 [2025-01-10 01:06:54,692 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:54,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1908899647, now seen corresponding path program 1 times [2025-01-10 01:06:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:54,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527230112] [2025-01-10 01:06:54,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:54,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:54,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 01:06:54,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:06:54,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:54,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:54,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:54,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527230112] [2025-01-10 01:06:54,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527230112] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:54,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897548644] [2025-01-10 01:06:54,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:54,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:54,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:54,781 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 01:06:54,782 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 01:06:54,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 01:06:54,830 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:06:54,830 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:54,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:54,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:06:54,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:54,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:54,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897548644] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:54,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:54,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-10 01:06:54,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57931177] [2025-01-10 01:06:54,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:54,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:06:54,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:54,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:06:54,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:06:54,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:54,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 256 flow. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 01:06:54,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:54,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:54,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:55,165 INFO L124 PetriNetUnfolderBase]: 378/659 cut-off events. [2025-01-10 01:06:55,165 INFO L125 PetriNetUnfolderBase]: For 1627/1698 co-relation queries the response was YES. [2025-01-10 01:06:55,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2429 conditions, 659 events. 378/659 cut-off events. For 1627/1698 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2619 event pairs, 218 based on Foata normal form. 11/670 useless extension candidates. Maximal degree in co-relation 1434. Up to 403 conditions per place. [2025-01-10 01:06:55,171 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 59 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2025-01-10 01:06:55,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 576 flow [2025-01-10 01:06:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:06:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:06:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2025-01-10 01:06:55,173 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2025-01-10 01:06:55,173 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 256 flow. Second operand 8 states and 114 transitions. [2025-01-10 01:06:55,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 576 flow [2025-01-10 01:06:55,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 561 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-01-10 01:06:55,178 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 325 flow [2025-01-10 01:06:55,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2025-01-10 01:06:55,179 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2025-01-10 01:06:55,179 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 325 flow [2025-01-10 01:06:55,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 01:06:55,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:55,180 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:55,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-10 01:06:55,380 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 01:06:55,381 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:55,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:55,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1737291428, now seen corresponding path program 2 times [2025-01-10 01:06:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:55,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824954725] [2025-01-10 01:06:55,381 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:06:55,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:55,389 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-01-10 01:06:55,397 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:06:55,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:06:55,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:06:55,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:55,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824954725] [2025-01-10 01:06:55,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824954725] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:55,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964920757] [2025-01-10 01:06:55,574 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:06:55,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:55,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:55,576 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 01:06:55,578 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 01:06:55,611 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-01-10 01:06:55,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:06:55,624 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:06:55,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:55,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 01:06:55,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:55,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:55,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-01-10 01:06:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964920757] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:55,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:55,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-01-10 01:06:55,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039681426] [2025-01-10 01:06:55,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:55,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:06:55,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:55,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:06:55,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:06:56,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:56,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 325 flow. Second operand has 20 states, 20 states have (on average 8.9) internal successors, (178), 20 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 01:06:56,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:56,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:56,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:56,725 INFO L124 PetriNetUnfolderBase]: 447/763 cut-off events. [2025-01-10 01:06:56,725 INFO L125 PetriNetUnfolderBase]: For 1896/1954 co-relation queries the response was YES. [2025-01-10 01:06:56,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3035 conditions, 763 events. 447/763 cut-off events. For 1896/1954 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3087 event pairs, 64 based on Foata normal form. 32/794 useless extension candidates. Maximal degree in co-relation 1920. Up to 132 conditions per place. [2025-01-10 01:06:56,731 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 109 selfloop transitions, 21 changer transitions 0/132 dead transitions. [2025-01-10 01:06:56,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 132 transitions, 1056 flow [2025-01-10 01:06:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-10 01:06:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-10 01:06:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 205 transitions. [2025-01-10 01:06:56,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2025-01-10 01:06:56,733 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 325 flow. Second operand 14 states and 205 transitions. [2025-01-10 01:06:56,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 132 transitions, 1056 flow [2025-01-10 01:06:56,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 132 transitions, 1028 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:56,738 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 385 flow [2025-01-10 01:06:56,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=385, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2025-01-10 01:06:56,739 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 40 predicate places. [2025-01-10 01:06:56,739 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 385 flow [2025-01-10 01:06:56,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.9) internal successors, (178), 20 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 01:06:56,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:56,739 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:56,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-10 01:06:56,940 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 01:06:56,940 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:56,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash 28274367, now seen corresponding path program 1 times [2025-01-10 01:06:56,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:56,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755556808] [2025-01-10 01:06:56,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:56,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:56,944 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:06:56,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:06:56,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:56,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:56,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:56,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755556808] [2025-01-10 01:06:56,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755556808] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:56,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:56,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:06:56,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827041761] [2025-01-10 01:06:56,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:56,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:06:56,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:56,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:06:56,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:06:56,966 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:06:56,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 385 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 01:06:56,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:56,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:06:56,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:57,069 INFO L124 PetriNetUnfolderBase]: 375/708 cut-off events. [2025-01-10 01:06:57,069 INFO L125 PetriNetUnfolderBase]: For 2781/2857 co-relation queries the response was YES. [2025-01-10 01:06:57,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3064 conditions, 708 events. 375/708 cut-off events. For 2781/2857 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3026 event pairs, 102 based on Foata normal form. 3/710 useless extension candidates. Maximal degree in co-relation 1872. Up to 489 conditions per place. [2025-01-10 01:06:57,083 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 52 selfloop transitions, 3 changer transitions 6/66 dead transitions. [2025-01-10 01:06:57,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 66 transitions, 618 flow [2025-01-10 01:06:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:06:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:06:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-01-10 01:06:57,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2025-01-10 01:06:57,085 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 385 flow. Second operand 3 states and 56 transitions. [2025-01-10 01:06:57,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 66 transitions, 618 flow [2025-01-10 01:06:57,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 538 flow, removed 13 selfloop flow, removed 10 redundant places. [2025-01-10 01:06:57,091 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 302 flow [2025-01-10 01:06:57,091 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2025-01-10 01:06:57,091 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2025-01-10 01:06:57,091 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 302 flow [2025-01-10 01:06:57,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 01:06:57,092 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:57,092 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:57,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-01-10 01:06:57,092 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:57,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:57,092 INFO L85 PathProgramCache]: Analyzing trace with hash 432469306, now seen corresponding path program 2 times [2025-01-10 01:06:57,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:57,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529325646] [2025-01-10 01:06:57,092 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:06:57,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:57,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-01-10 01:06:57,107 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:06:57,108 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:06:57,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:06:57,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:57,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529325646] [2025-01-10 01:06:57,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529325646] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:57,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11609835] [2025-01-10 01:06:57,248 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:06:57,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:57,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:57,251 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 01:06:57,253 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 01:06:57,289 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-01-10 01:06:57,302 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:06:57,302 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:06:57,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:57,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 01:06:57,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:57,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:57,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-01-10 01:06:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:57,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11609835] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:57,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:57,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-01-10 01:06:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489276933] [2025-01-10 01:06:57,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:57,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:06:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:57,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:06:57,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:06:57,723 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:57,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 302 flow. Second operand has 20 states, 20 states have (on average 9.2) internal successors, (184), 20 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 01:06:57,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:57,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:57,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:58,344 INFO L124 PetriNetUnfolderBase]: 506/852 cut-off events. [2025-01-10 01:06:58,344 INFO L125 PetriNetUnfolderBase]: For 2195/2286 co-relation queries the response was YES. [2025-01-10 01:06:58,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3380 conditions, 852 events. 506/852 cut-off events. For 2195/2286 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3509 event pairs, 92 based on Foata normal form. 34/884 useless extension candidates. Maximal degree in co-relation 2424. Up to 167 conditions per place. [2025-01-10 01:06:58,350 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 109 selfloop transitions, 18 changer transitions 0/131 dead transitions. [2025-01-10 01:06:58,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 131 transitions, 1047 flow [2025-01-10 01:06:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-10 01:06:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-10 01:06:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 192 transitions. [2025-01-10 01:06:58,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2025-01-10 01:06:58,353 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 302 flow. Second operand 14 states and 192 transitions. [2025-01-10 01:06:58,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 131 transitions, 1047 flow [2025-01-10 01:06:58,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 131 transitions, 964 flow, removed 24 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:58,360 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 337 flow [2025-01-10 01:06:58,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=337, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2025-01-10 01:06:58,362 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2025-01-10 01:06:58,362 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 337 flow [2025-01-10 01:06:58,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.2) internal successors, (184), 20 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 01:06:58,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:58,363 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:58,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-10 01:06:58,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:58,568 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:58,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash 375975714, now seen corresponding path program 1 times [2025-01-10 01:06:58,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:58,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067422566] [2025-01-10 01:06:58,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:58,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:06:58,581 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:06:58,581 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:58,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:58,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:58,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067422566] [2025-01-10 01:06:58,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067422566] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:58,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888107902] [2025-01-10 01:06:58,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:58,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:58,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:58,660 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 01:06:58,662 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 01:06:58,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:06:58,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:06:58,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:58,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:58,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:06:58,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:58,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888107902] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:58,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:06:58,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2025-01-10 01:06:58,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316935678] [2025-01-10 01:06:58,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:58,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:06:58,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:58,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:06:58,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:06:58,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:58,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 337 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:58,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:58,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:58,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:58,907 INFO L124 PetriNetUnfolderBase]: 466/801 cut-off events. [2025-01-10 01:06:58,908 INFO L125 PetriNetUnfolderBase]: For 1940/1958 co-relation queries the response was YES. [2025-01-10 01:06:58,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 801 events. 466/801 cut-off events. For 1940/1958 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3305 event pairs, 126 based on Foata normal form. 34/833 useless extension candidates. Maximal degree in co-relation 2328. Up to 429 conditions per place. [2025-01-10 01:06:58,913 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 52 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2025-01-10 01:06:58,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 539 flow [2025-01-10 01:06:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:06:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:06:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-01-10 01:06:58,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2025-01-10 01:06:58,915 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 337 flow. Second operand 5 states and 64 transitions. [2025-01-10 01:06:58,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 539 flow [2025-01-10 01:06:58,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 495 flow, removed 8 selfloop flow, removed 11 redundant places. [2025-01-10 01:06:58,919 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 309 flow [2025-01-10 01:06:58,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2025-01-10 01:06:58,920 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2025-01-10 01:06:58,920 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 309 flow [2025-01-10 01:06:58,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:58,920 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:58,920 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:58,927 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 01:06:59,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:59,121 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:59,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1704794511, now seen corresponding path program 1 times [2025-01-10 01:06:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:59,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163483226] [2025-01-10 01:06:59,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:59,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:06:59,130 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:06:59,130 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:59,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:59,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:59,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163483226] [2025-01-10 01:06:59,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163483226] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:59,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127010052] [2025-01-10 01:06:59,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:59,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:59,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:59,187 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 01:06:59,189 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 01:06:59,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:06:59,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:06:59,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:59,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:59,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:06:59,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:59,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:59,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127010052] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:59,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:06:59,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2025-01-10 01:06:59,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931508591] [2025-01-10 01:06:59,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:59,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:06:59,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:59,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:06:59,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:06:59,295 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:06:59,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:59,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:59,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:06:59,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:59,380 INFO L124 PetriNetUnfolderBase]: 420/744 cut-off events. [2025-01-10 01:06:59,380 INFO L125 PetriNetUnfolderBase]: For 1990/1999 co-relation queries the response was YES. [2025-01-10 01:06:59,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2887 conditions, 744 events. 420/744 cut-off events. For 1990/1999 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3136 event pairs, 106 based on Foata normal form. 30/754 useless extension candidates. Maximal degree in co-relation 2240. Up to 403 conditions per place. [2025-01-10 01:06:59,384 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 49 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2025-01-10 01:06:59,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 522 flow [2025-01-10 01:06:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:06:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:06:59,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2025-01-10 01:06:59,386 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2025-01-10 01:06:59,386 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 309 flow. Second operand 5 states and 65 transitions. [2025-01-10 01:06:59,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 522 flow [2025-01-10 01:06:59,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 499 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-01-10 01:06:59,405 INFO L231 Difference]: Finished difference. Result has 69 places, 49 transitions, 318 flow [2025-01-10 01:06:59,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2025-01-10 01:06:59,406 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 35 predicate places. [2025-01-10 01:06:59,406 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 318 flow [2025-01-10 01:06:59,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:59,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:59,407 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] [2025-01-10 01:06:59,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-10 01:06:59,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:59,607 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:59,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash 168622269, now seen corresponding path program 1 times [2025-01-10 01:06:59,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:59,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562461878] [2025-01-10 01:06:59,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:59,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:59,617 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-10 01:06:59,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:06:59,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:59,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:06:59,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:59,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562461878] [2025-01-10 01:06:59,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562461878] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:59,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:59,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-10 01:06:59,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16797002] [2025-01-10 01:06:59,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:59,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:06:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:59,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:06:59,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:06:59,844 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:06:59,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 01:06:59,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:59,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:06:59,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:00,009 INFO L124 PetriNetUnfolderBase]: 380/741 cut-off events. [2025-01-10 01:07:00,009 INFO L125 PetriNetUnfolderBase]: For 2137/2163 co-relation queries the response was YES. [2025-01-10 01:07:00,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2925 conditions, 741 events. 380/741 cut-off events. For 2137/2163 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3418 event pairs, 108 based on Foata normal form. 2/741 useless extension candidates. Maximal degree in co-relation 2153. Up to 525 conditions per place. [2025-01-10 01:07:00,015 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 50 selfloop transitions, 19 changer transitions 7/85 dead transitions. [2025-01-10 01:07:00,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 85 transitions, 695 flow [2025-01-10 01:07:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:07:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:07:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2025-01-10 01:07:00,017 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2025-01-10 01:07:00,017 INFO L175 Difference]: Start difference. First operand has 69 places, 49 transitions, 318 flow. Second operand 9 states and 120 transitions. [2025-01-10 01:07:00,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 85 transitions, 695 flow [2025-01-10 01:07:00,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 668 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-01-10 01:07:00,023 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 490 flow [2025-01-10 01:07:00,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=490, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2025-01-10 01:07:00,024 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2025-01-10 01:07:00,024 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 490 flow [2025-01-10 01:07:00,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 01:07:00,024 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:00,024 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] [2025-01-10 01:07:00,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-01-10 01:07:00,024 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:00,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:00,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1016016191, now seen corresponding path program 2 times [2025-01-10 01:07:00,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:00,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125860905] [2025-01-10 01:07:00,025 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:00,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:00,046 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-01-10 01:07:00,055 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:00,055 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:00,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:00,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:00,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125860905] [2025-01-10 01:07:00,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125860905] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:00,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974768536] [2025-01-10 01:07:00,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:00,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:00,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:00,252 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 01:07:00,254 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 01:07:00,292 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-01-10 01:07:00,308 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:00,309 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:00,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:00,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:07:00,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:00,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:00,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:00,434 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 21 treesize of output 14 [2025-01-10 01:07:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:00,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974768536] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:00,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:00,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2025-01-10 01:07:00,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85877805] [2025-01-10 01:07:00,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:00,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:07:00,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:00,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:07:00,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:07:00,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:07:00,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 490 flow. Second operand has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 01:07:00,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:00,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:07:00,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:00,884 INFO L124 PetriNetUnfolderBase]: 427/843 cut-off events. [2025-01-10 01:07:00,884 INFO L125 PetriNetUnfolderBase]: For 3041/3074 co-relation queries the response was YES. [2025-01-10 01:07:00,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3670 conditions, 843 events. 427/843 cut-off events. For 3041/3074 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4167 event pairs, 131 based on Foata normal form. 6/845 useless extension candidates. Maximal degree in co-relation 2690. Up to 586 conditions per place. [2025-01-10 01:07:00,892 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 61 selfloop transitions, 23 changer transitions 9/102 dead transitions. [2025-01-10 01:07:00,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 102 transitions, 949 flow [2025-01-10 01:07:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:07:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:07:00,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2025-01-10 01:07:00,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2025-01-10 01:07:00,893 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 490 flow. Second operand 9 states and 125 transitions. [2025-01-10 01:07:00,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 102 transitions, 949 flow [2025-01-10 01:07:00,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 102 transitions, 917 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-01-10 01:07:00,900 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 685 flow [2025-01-10 01:07:00,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=685, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2025-01-10 01:07:00,900 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2025-01-10 01:07:00,901 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 685 flow [2025-01-10 01:07:00,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 01:07:00,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:00,901 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] [2025-01-10 01:07:00,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:01,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-10 01:07:01,105 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:01,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash 826747597, now seen corresponding path program 3 times [2025-01-10 01:07:01,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:01,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709282296] [2025-01-10 01:07:01,106 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:01,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-01-10 01:07:01,117 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 22 statements. [2025-01-10 01:07:01,117 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:07:01,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:01,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:01,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709282296] [2025-01-10 01:07:01,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709282296] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:01,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871219005] [2025-01-10 01:07:01,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:01,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:01,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:01,273 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 01:07:01,274 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 01:07:01,313 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-01-10 01:07:01,329 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 22 statements. [2025-01-10 01:07:01,329 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:07:01,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:01,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:07:01,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:01,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:01,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:01,403 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 17 treesize of output 14 [2025-01-10 01:07:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:01,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871219005] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:01,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:01,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2025-01-10 01:07:01,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781963912] [2025-01-10 01:07:01,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:01,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:07:01,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:01,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:07:01,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:07:01,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:07:01,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 685 flow. Second operand has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 0 states have call successors, (0), 0 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 01:07:01,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:01,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:07:01,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:01,740 INFO L124 PetriNetUnfolderBase]: 465/934 cut-off events. [2025-01-10 01:07:01,740 INFO L125 PetriNetUnfolderBase]: For 4698/4736 co-relation queries the response was YES. [2025-01-10 01:07:01,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4403 conditions, 934 events. 465/934 cut-off events. For 4698/4736 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4900 event pairs, 79 based on Foata normal form. 10/944 useless extension candidates. Maximal degree in co-relation 3335. Up to 574 conditions per place. [2025-01-10 01:07:01,747 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 71 selfloop transitions, 33 changer transitions 12/125 dead transitions. [2025-01-10 01:07:01,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 125 transitions, 1271 flow [2025-01-10 01:07:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:07:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:07:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2025-01-10 01:07:01,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2025-01-10 01:07:01,749 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 685 flow. Second operand 9 states and 135 transitions. [2025-01-10 01:07:01,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 125 transitions, 1271 flow [2025-01-10 01:07:01,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 125 transitions, 1236 flow, removed 16 selfloop flow, removed 1 redundant places. [2025-01-10 01:07:01,759 INFO L231 Difference]: Finished difference. Result has 99 places, 88 transitions, 902 flow [2025-01-10 01:07:01,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=902, PETRI_PLACES=99, PETRI_TRANSITIONS=88} [2025-01-10 01:07:01,760 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 65 predicate places. [2025-01-10 01:07:01,760 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 88 transitions, 902 flow [2025-01-10 01:07:01,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 0 states have call successors, (0), 0 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 01:07:01,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:01,761 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] [2025-01-10 01:07:01,767 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 01:07:01,961 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,SelfDestructingSolverStorable17 [2025-01-10 01:07:01,961 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:01,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:01,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1941825783, now seen corresponding path program 4 times [2025-01-10 01:07:01,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:01,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9501470] [2025-01-10 01:07:01,962 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:01,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:01,967 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-01-10 01:07:01,972 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:01,973 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:07:01,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:02,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:02,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9501470] [2025-01-10 01:07:02,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9501470] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:02,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765443325] [2025-01-10 01:07:02,219 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:02,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:02,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:02,221 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 01:07:02,224 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 01:07:02,262 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-01-10 01:07:02,278 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:02,278 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:07:02,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:02,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:07:02,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:02,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:02,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:02,375 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 21 treesize of output 14 [2025-01-10 01:07:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:02,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765443325] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:02,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:02,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2025-01-10 01:07:02,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845585263] [2025-01-10 01:07:02,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:02,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:07:02,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:02,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:07:02,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:07:02,476 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:07:02,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 902 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 01:07:02,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:02,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:07:02,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:02,755 INFO L124 PetriNetUnfolderBase]: 490/977 cut-off events. [2025-01-10 01:07:02,755 INFO L125 PetriNetUnfolderBase]: For 6096/6141 co-relation queries the response was YES. [2025-01-10 01:07:02,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4902 conditions, 977 events. 490/977 cut-off events. For 6096/6141 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5200 event pairs, 110 based on Foata normal form. 10/984 useless extension candidates. Maximal degree in co-relation 4229. Up to 708 conditions per place. [2025-01-10 01:07:02,761 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 79 selfloop transitions, 20 changer transitions 11/119 dead transitions. [2025-01-10 01:07:02,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 119 transitions, 1356 flow [2025-01-10 01:07:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:07:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:07:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2025-01-10 01:07:02,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2025-01-10 01:07:02,762 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 902 flow. Second operand 8 states and 115 transitions. [2025-01-10 01:07:02,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 119 transitions, 1356 flow [2025-01-10 01:07:02,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 119 transitions, 1283 flow, removed 30 selfloop flow, removed 3 redundant places. [2025-01-10 01:07:02,773 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 939 flow [2025-01-10 01:07:02,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=939, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2025-01-10 01:07:02,774 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 72 predicate places. [2025-01-10 01:07:02,774 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 939 flow [2025-01-10 01:07:02,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 01:07:02,774 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:02,774 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] [2025-01-10 01:07:02,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:02,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:02,975 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:02,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:02,975 INFO L85 PathProgramCache]: Analyzing trace with hash 656949591, now seen corresponding path program 5 times [2025-01-10 01:07:02,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:02,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290111464] [2025-01-10 01:07:02,976 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:07:02,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:02,981 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-01-10 01:07:02,992 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:02,992 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:07:02,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:03,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:03,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290111464] [2025-01-10 01:07:03,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290111464] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:03,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008054116] [2025-01-10 01:07:03,262 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:07:03,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:03,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:03,264 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 01:07:03,266 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 01:07:03,306 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-01-10 01:07:03,328 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:03,328 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:07:03,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:03,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:07:03,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:03,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:03,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:03,433 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 21 treesize of output 14 [2025-01-10 01:07:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008054116] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:03,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:03,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2025-01-10 01:07:03,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432999733] [2025-01-10 01:07:03,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:03,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-10 01:07:03,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:03,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-10 01:07:03,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2025-01-10 01:07:03,532 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:07:03,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 939 flow. Second operand has 15 states, 15 states have (on average 10.4) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 01:07:03,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:03,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:07:03,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:03,872 INFO L124 PetriNetUnfolderBase]: 518/1026 cut-off events. [2025-01-10 01:07:03,872 INFO L125 PetriNetUnfolderBase]: For 6905/6956 co-relation queries the response was YES. [2025-01-10 01:07:03,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5250 conditions, 1026 events. 518/1026 cut-off events. For 6905/6956 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5580 event pairs, 136 based on Foata normal form. 10/1035 useless extension candidates. Maximal degree in co-relation 4390. Up to 760 conditions per place. [2025-01-10 01:07:03,882 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 82 selfloop transitions, 25 changer transitions 10/126 dead transitions. [2025-01-10 01:07:03,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 126 transitions, 1470 flow [2025-01-10 01:07:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:07:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:07:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2025-01-10 01:07:03,885 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2025-01-10 01:07:03,885 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 939 flow. Second operand 9 states and 125 transitions. [2025-01-10 01:07:03,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 126 transitions, 1470 flow [2025-01-10 01:07:03,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 126 transitions, 1432 flow, removed 15 selfloop flow, removed 3 redundant places. [2025-01-10 01:07:03,900 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 1131 flow [2025-01-10 01:07:03,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1131, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2025-01-10 01:07:03,900 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 81 predicate places. [2025-01-10 01:07:03,901 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 1131 flow [2025-01-10 01:07:03,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.4) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 01:07:03,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:03,901 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] [2025-01-10 01:07:03,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:04,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:04,102 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:04,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2009264415, now seen corresponding path program 6 times [2025-01-10 01:07:04,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:04,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717640760] [2025-01-10 01:07:04,103 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:07:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:04,109 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 3 equivalence classes. [2025-01-10 01:07:04,115 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:04,116 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:07:04,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:04,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717640760] [2025-01-10 01:07:04,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717640760] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006442170] [2025-01-10 01:07:04,233 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:07:04,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:04,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:04,238 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 01:07:04,243 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 01:07:04,281 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 3 equivalence classes. [2025-01-10 01:07:04,297 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:04,298 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:07:04,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:04,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-10 01:07:04,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:04,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:04,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:04,411 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 21 treesize of output 14 [2025-01-10 01:07:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:04,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006442170] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:04,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:04,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2025-01-10 01:07:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153571643] [2025-01-10 01:07:04,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:04,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:07:04,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:04,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:07:04,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:07:04,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:07:04,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 1131 flow. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 01:07:04,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:04,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:07:04,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:04,723 INFO L124 PetriNetUnfolderBase]: 525/1041 cut-off events. [2025-01-10 01:07:04,723 INFO L125 PetriNetUnfolderBase]: For 8096/8162 co-relation queries the response was YES. [2025-01-10 01:07:04,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5586 conditions, 1041 events. 525/1041 cut-off events. For 8096/8162 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5688 event pairs, 138 based on Foata normal form. 10/1048 useless extension candidates. Maximal degree in co-relation 4787. Up to 757 conditions per place. [2025-01-10 01:07:04,748 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 86 selfloop transitions, 26 changer transitions 8/129 dead transitions. [2025-01-10 01:07:04,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 129 transitions, 1558 flow [2025-01-10 01:07:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:07:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:07:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2025-01-10 01:07:04,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2025-01-10 01:07:04,751 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 1131 flow. Second operand 8 states and 116 transitions. [2025-01-10 01:07:04,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 129 transitions, 1558 flow [2025-01-10 01:07:04,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 129 transitions, 1503 flow, removed 25 selfloop flow, removed 2 redundant places. [2025-01-10 01:07:04,770 INFO L231 Difference]: Finished difference. Result has 123 places, 106 transitions, 1202 flow [2025-01-10 01:07:04,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1202, PETRI_PLACES=123, PETRI_TRANSITIONS=106} [2025-01-10 01:07:04,771 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 89 predicate places. [2025-01-10 01:07:04,771 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 106 transitions, 1202 flow [2025-01-10 01:07:04,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 01:07:04,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:04,771 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] [2025-01-10 01:07:04,779 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 01:07:04,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-01-10 01:07:04,976 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:04,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -604471465, now seen corresponding path program 7 times [2025-01-10 01:07:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:04,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394097108] [2025-01-10 01:07:04,977 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:07:04,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:04,980 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-10 01:07:04,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:04,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:04,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:05,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:05,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394097108] [2025-01-10 01:07:05,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394097108] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:05,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:05,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-10 01:07:05,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114185108] [2025-01-10 01:07:05,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:05,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:07:05,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:05,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:07:05,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:07:05,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:07:05,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 106 transitions, 1202 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 01:07:05,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:05,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:07:05,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:05,331 INFO L124 PetriNetUnfolderBase]: 534/1063 cut-off events. [2025-01-10 01:07:05,331 INFO L125 PetriNetUnfolderBase]: For 9019/9075 co-relation queries the response was YES. [2025-01-10 01:07:05,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5877 conditions, 1063 events. 534/1063 cut-off events. For 9019/9075 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5871 event pairs, 123 based on Foata normal form. 2/1062 useless extension candidates. Maximal degree in co-relation 5231. Up to 797 conditions per place. [2025-01-10 01:07:05,338 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 95 selfloop transitions, 26 changer transitions 7/137 dead transitions. [2025-01-10 01:07:05,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 137 transitions, 1781 flow [2025-01-10 01:07:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:07:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:07:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2025-01-10 01:07:05,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2025-01-10 01:07:05,341 INFO L175 Difference]: Start difference. First operand has 123 places, 106 transitions, 1202 flow. Second operand 7 states and 103 transitions. [2025-01-10 01:07:05,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 137 transitions, 1781 flow [2025-01-10 01:07:05,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 137 transitions, 1707 flow, removed 20 selfloop flow, removed 6 redundant places. [2025-01-10 01:07:05,359 INFO L231 Difference]: Finished difference. Result has 126 places, 117 transitions, 1399 flow [2025-01-10 01:07:05,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1399, PETRI_PLACES=126, PETRI_TRANSITIONS=117} [2025-01-10 01:07:05,360 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 92 predicate places. [2025-01-10 01:07:05,360 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 117 transitions, 1399 flow [2025-01-10 01:07:05,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 01:07:05,360 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:05,360 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] [2025-01-10 01:07:05,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-01-10 01:07:05,360 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:05,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:05,360 INFO L85 PathProgramCache]: Analyzing trace with hash -296451753, now seen corresponding path program 8 times [2025-01-10 01:07:05,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:05,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076930452] [2025-01-10 01:07:05,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:05,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:05,364 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-01-10 01:07:05,369 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:05,369 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:05,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:05,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:05,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076930452] [2025-01-10 01:07:05,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076930452] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:05,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570621586] [2025-01-10 01:07:05,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:05,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:05,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:05,449 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 01:07:05,450 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 01:07:05,485 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-01-10 01:07:05,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:05,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:05,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:05,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:07:05,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:05,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:05,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:05,565 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 17 treesize of output 14 [2025-01-10 01:07:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:05,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570621586] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:05,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:05,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2025-01-10 01:07:05,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374144721] [2025-01-10 01:07:05,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:05,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:07:05,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:05,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:07:05,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:07:05,593 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:07:05,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 117 transitions, 1399 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 01:07:05,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:05,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:07:05,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:05,811 INFO L124 PetriNetUnfolderBase]: 528/1063 cut-off events. [2025-01-10 01:07:05,811 INFO L125 PetriNetUnfolderBase]: For 9531/9588 co-relation queries the response was YES. [2025-01-10 01:07:05,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5989 conditions, 1063 events. 528/1063 cut-off events. For 9531/9588 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5899 event pairs, 108 based on Foata normal form. 2/1064 useless extension candidates. Maximal degree in co-relation 5523. Up to 721 conditions per place. [2025-01-10 01:07:05,820 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 92 selfloop transitions, 30 changer transitions 16/145 dead transitions. [2025-01-10 01:07:05,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 145 transitions, 1899 flow [2025-01-10 01:07:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:07:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:07:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2025-01-10 01:07:05,821 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2025-01-10 01:07:05,822 INFO L175 Difference]: Start difference. First operand has 126 places, 117 transitions, 1399 flow. Second operand 8 states and 120 transitions. [2025-01-10 01:07:05,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 145 transitions, 1899 flow [2025-01-10 01:07:05,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 145 transitions, 1822 flow, removed 32 selfloop flow, removed 2 redundant places. [2025-01-10 01:07:05,840 INFO L231 Difference]: Finished difference. Result has 134 places, 112 transitions, 1388 flow [2025-01-10 01:07:05,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1388, PETRI_PLACES=134, PETRI_TRANSITIONS=112} [2025-01-10 01:07:05,840 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 100 predicate places. [2025-01-10 01:07:05,840 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 112 transitions, 1388 flow [2025-01-10 01:07:05,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 01:07:05,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:05,841 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] [2025-01-10 01:07:05,848 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 01:07:06,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:06,042 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:06,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash 815837375, now seen corresponding path program 9 times [2025-01-10 01:07:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:06,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713929766] [2025-01-10 01:07:06,042 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:06,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:06,048 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-01-10 01:07:06,054 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 27 statements. [2025-01-10 01:07:06,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:07:06,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-10 01:07:06,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713929766] [2025-01-10 01:07:06,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713929766] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:06,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-10 01:07:06,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171026395] [2025-01-10 01:07:06,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:06,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-10 01:07:06,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:06,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-10 01:07:06,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-10 01:07:06,100 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:06,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 112 transitions, 1388 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:06,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:06,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:06,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:06,367 INFO L124 PetriNetUnfolderBase]: 936/1605 cut-off events. [2025-01-10 01:07:06,367 INFO L125 PetriNetUnfolderBase]: For 13386/13386 co-relation queries the response was YES. [2025-01-10 01:07:06,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8909 conditions, 1605 events. 936/1605 cut-off events. For 13386/13386 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8085 event pairs, 214 based on Foata normal form. 3/1608 useless extension candidates. Maximal degree in co-relation 8840. Up to 555 conditions per place. [2025-01-10 01:07:06,380 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 154 selfloop transitions, 17 changer transitions 12/184 dead transitions. [2025-01-10 01:07:06,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 184 transitions, 2463 flow [2025-01-10 01:07:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:07:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:07:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2025-01-10 01:07:06,382 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2025-01-10 01:07:06,382 INFO L175 Difference]: Start difference. First operand has 134 places, 112 transitions, 1388 flow. Second operand 7 states and 106 transitions. [2025-01-10 01:07:06,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 184 transitions, 2463 flow [2025-01-10 01:07:06,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 184 transitions, 2330 flow, removed 42 selfloop flow, removed 9 redundant places. [2025-01-10 01:07:06,409 INFO L231 Difference]: Finished difference. Result has 126 places, 112 transitions, 1336 flow [2025-01-10 01:07:06,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1336, PETRI_PLACES=126, PETRI_TRANSITIONS=112} [2025-01-10 01:07:06,410 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 92 predicate places. [2025-01-10 01:07:06,410 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 112 transitions, 1336 flow [2025-01-10 01:07:06,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:06,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:06,410 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] [2025-01-10 01:07:06,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-01-10 01:07:06,410 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:06,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1605437128, now seen corresponding path program 10 times [2025-01-10 01:07:06,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:06,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992188537] [2025-01-10 01:07:06,411 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:06,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:06,417 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:07:06,419 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 27 statements. [2025-01-10 01:07:06,419 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:07:06,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-10 01:07:06,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:06,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992188537] [2025-01-10 01:07:06,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992188537] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:06,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636364625] [2025-01-10 01:07:06,456 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:06,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:06,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:06,458 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 01:07:06,464 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 01:07:06,508 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-01-10 01:07:06,520 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 27 statements. [2025-01-10 01:07:06,520 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:07:06,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:06,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:07:06,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-10 01:07:06,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-10 01:07:06,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636364625] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:06,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:06,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-01-10 01:07:06,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262348650] [2025-01-10 01:07:06,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:06,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:07:06,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:06,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:07:06,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:07:06,610 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:06,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 112 transitions, 1336 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:06,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:06,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:06,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:06,946 INFO L124 PetriNetUnfolderBase]: 1039/1774 cut-off events. [2025-01-10 01:07:06,947 INFO L125 PetriNetUnfolderBase]: For 14838/14838 co-relation queries the response was YES. [2025-01-10 01:07:06,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9510 conditions, 1774 events. 1039/1774 cut-off events. For 14838/14838 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8976 event pairs, 70 based on Foata normal form. 13/1787 useless extension candidates. Maximal degree in co-relation 9441. Up to 336 conditions per place. [2025-01-10 01:07:06,958 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 188 selfloop transitions, 86 changer transitions 0/275 dead transitions. [2025-01-10 01:07:06,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 275 transitions, 3558 flow [2025-01-10 01:07:06,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-10 01:07:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-01-10 01:07:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 196 transitions. [2025-01-10 01:07:06,959 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39595959595959596 [2025-01-10 01:07:06,959 INFO L175 Difference]: Start difference. First operand has 126 places, 112 transitions, 1336 flow. Second operand 15 states and 196 transitions. [2025-01-10 01:07:06,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 275 transitions, 3558 flow [2025-01-10 01:07:06,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 275 transitions, 3462 flow, removed 19 selfloop flow, removed 5 redundant places. [2025-01-10 01:07:06,983 INFO L231 Difference]: Finished difference. Result has 136 places, 168 transitions, 2110 flow [2025-01-10 01:07:06,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2110, PETRI_PLACES=136, PETRI_TRANSITIONS=168} [2025-01-10 01:07:06,985 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 102 predicate places. [2025-01-10 01:07:06,985 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 168 transitions, 2110 flow [2025-01-10 01:07:06,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:06,985 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:06,985 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] [2025-01-10 01:07:06,991 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 01:07:07,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:07,186 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:07,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1477074647, now seen corresponding path program 11 times [2025-01-10 01:07:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:07,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917647781] [2025-01-10 01:07:07,186 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:07:07,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:07,192 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-01-10 01:07:07,204 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:07:07,204 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-10 01:07:07,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-10 01:07:07,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:07,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917647781] [2025-01-10 01:07:07,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917647781] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:07,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069709013] [2025-01-10 01:07:07,244 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:07:07,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:07,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:07,247 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 01:07:07,249 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 01:07:07,289 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-01-10 01:07:07,308 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:07:07,308 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-10 01:07:07,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:07,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:07,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-10 01:07:07,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-10 01:07:07,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069709013] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:07,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:07,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-01-10 01:07:07,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139786882] [2025-01-10 01:07:07,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:07,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:07:07,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:07,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:07:07,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:07:07,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:07,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 168 transitions, 2110 flow. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 16 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 01:07:07,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:07,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:07,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:07,814 INFO L124 PetriNetUnfolderBase]: 1003/1674 cut-off events. [2025-01-10 01:07:07,815 INFO L125 PetriNetUnfolderBase]: For 16157/16157 co-relation queries the response was YES. [2025-01-10 01:07:07,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9934 conditions, 1674 events. 1003/1674 cut-off events. For 16157/16157 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8054 event pairs, 117 based on Foata normal form. 106/1780 useless extension candidates. Maximal degree in co-relation 9864. Up to 569 conditions per place. [2025-01-10 01:07:07,828 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 205 selfloop transitions, 45 changer transitions 0/251 dead transitions. [2025-01-10 01:07:07,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 251 transitions, 3472 flow [2025-01-10 01:07:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:07:07,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:07:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2025-01-10 01:07:07,829 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38016528925619836 [2025-01-10 01:07:07,829 INFO L175 Difference]: Start difference. First operand has 136 places, 168 transitions, 2110 flow. Second operand 11 states and 138 transitions. [2025-01-10 01:07:07,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 251 transitions, 3472 flow [2025-01-10 01:07:07,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 251 transitions, 3234 flow, removed 70 selfloop flow, removed 6 redundant places. [2025-01-10 01:07:07,864 INFO L231 Difference]: Finished difference. Result has 142 places, 172 transitions, 2100 flow [2025-01-10 01:07:07,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2100, PETRI_PLACES=142, PETRI_TRANSITIONS=172} [2025-01-10 01:07:07,864 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 108 predicate places. [2025-01-10 01:07:07,865 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 172 transitions, 2100 flow [2025-01-10 01:07:07,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 16 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 01:07:07,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:07,865 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] [2025-01-10 01:07:07,871 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 01:07:08,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:08,066 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:08,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1017577584, now seen corresponding path program 12 times [2025-01-10 01:07:08,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:08,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088422283] [2025-01-10 01:07:08,066 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:07:08,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:08,071 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 4 equivalence classes. [2025-01-10 01:07:08,076 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 25 of 27 statements. [2025-01-10 01:07:08,076 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:07:08,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-10 01:07:08,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:08,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088422283] [2025-01-10 01:07:08,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088422283] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:08,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33546191] [2025-01-10 01:07:08,117 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:07:08,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:08,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:08,120 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 01:07:08,122 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 01:07:08,163 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 4 equivalence classes. [2025-01-10 01:07:08,180 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 25 of 27 statements. [2025-01-10 01:07:08,181 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:07:08,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:08,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:07:08,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-10 01:07:08,219 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-10 01:07:08,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33546191] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:08,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:08,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-01-10 01:07:08,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053477181] [2025-01-10 01:07:08,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:08,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 01:07:08,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:08,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 01:07:08,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:07:08,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:08,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 172 transitions, 2100 flow. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 01:07:08,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:08,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:08,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:08,579 INFO L124 PetriNetUnfolderBase]: 1418/2323 cut-off events. [2025-01-10 01:07:08,579 INFO L125 PetriNetUnfolderBase]: For 22093/22093 co-relation queries the response was YES. [2025-01-10 01:07:08,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13637 conditions, 2323 events. 1418/2323 cut-off events. For 22093/22093 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11477 event pairs, 160 based on Foata normal form. 12/2335 useless extension candidates. Maximal degree in co-relation 13565. Up to 765 conditions per place. [2025-01-10 01:07:08,596 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 220 selfloop transitions, 82 changer transitions 0/303 dead transitions. [2025-01-10 01:07:08,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 303 transitions, 3979 flow [2025-01-10 01:07:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 01:07:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-10 01:07:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 173 transitions. [2025-01-10 01:07:08,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2025-01-10 01:07:08,597 INFO L175 Difference]: Start difference. First operand has 142 places, 172 transitions, 2100 flow. Second operand 12 states and 173 transitions. [2025-01-10 01:07:08,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 303 transitions, 3979 flow [2025-01-10 01:07:08,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 303 transitions, 3863 flow, removed 14 selfloop flow, removed 8 redundant places. [2025-01-10 01:07:08,640 INFO L231 Difference]: Finished difference. Result has 150 places, 211 transitions, 2680 flow [2025-01-10 01:07:08,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2680, PETRI_PLACES=150, PETRI_TRANSITIONS=211} [2025-01-10 01:07:08,640 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 116 predicate places. [2025-01-10 01:07:08,640 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 211 transitions, 2680 flow [2025-01-10 01:07:08,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 01:07:08,641 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:08,641 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] [2025-01-10 01:07:08,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:08,841 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,SelfDestructingSolverStorable26 [2025-01-10 01:07:08,842 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:08,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash 223895252, now seen corresponding path program 13 times [2025-01-10 01:07:08,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:08,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158644142] [2025-01-10 01:07:08,842 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:07:08,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:08,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-10 01:07:08,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:07:08,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:08,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:08,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:08,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158644142] [2025-01-10 01:07:08,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158644142] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:08,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256893288] [2025-01-10 01:07:08,923 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:07:08,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:08,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:08,925 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 01:07:08,928 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 01:07:08,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-10 01:07:08,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:07:08,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:08,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:08,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:08,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:09,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:09,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256893288] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:09,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:09,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2025-01-10 01:07:09,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174229517] [2025-01-10 01:07:09,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:09,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-10 01:07:09,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:09,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-10 01:07:09,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-01-10 01:07:09,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:07:09,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 211 transitions, 2680 flow. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 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 01:07:09,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:09,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:07:09,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:09,392 INFO L124 PetriNetUnfolderBase]: 1009/1728 cut-off events. [2025-01-10 01:07:09,392 INFO L125 PetriNetUnfolderBase]: For 21306/21306 co-relation queries the response was YES. [2025-01-10 01:07:09,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11021 conditions, 1728 events. 1009/1728 cut-off events. For 21306/21306 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8733 event pairs, 116 based on Foata normal form. 87/1812 useless extension candidates. Maximal degree in co-relation 10950. Up to 714 conditions per place. [2025-01-10 01:07:09,405 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 174 selfloop transitions, 61 changer transitions 0/240 dead transitions. [2025-01-10 01:07:09,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 240 transitions, 3460 flow [2025-01-10 01:07:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:07:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:07:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2025-01-10 01:07:09,406 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2025-01-10 01:07:09,406 INFO L175 Difference]: Start difference. First operand has 150 places, 211 transitions, 2680 flow. Second operand 9 states and 111 transitions. [2025-01-10 01:07:09,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 240 transitions, 3460 flow [2025-01-10 01:07:09,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 240 transitions, 3388 flow, removed 14 selfloop flow, removed 4 redundant places. [2025-01-10 01:07:09,449 INFO L231 Difference]: Finished difference. Result has 153 places, 199 transitions, 2583 flow [2025-01-10 01:07:09,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2583, PETRI_PLACES=153, PETRI_TRANSITIONS=199} [2025-01-10 01:07:09,449 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 119 predicate places. [2025-01-10 01:07:09,450 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 199 transitions, 2583 flow [2025-01-10 01:07:09,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 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 01:07:09,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:09,450 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:09,456 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 01:07:09,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:09,651 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:09,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1390459555, now seen corresponding path program 14 times [2025-01-10 01:07:09,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:09,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203425018] [2025-01-10 01:07:09,651 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:09,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:09,656 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:07:09,671 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:09,675 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:09,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:10,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:10,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203425018] [2025-01-10 01:07:10,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203425018] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:10,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944522268] [2025-01-10 01:07:10,292 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:10,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:10,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:10,294 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 01:07:10,296 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 01:07:10,335 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:07:10,355 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:10,355 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:10,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:10,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-10 01:07:10,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:07:10,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:10,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:10,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-01-10 01:07:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:10,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944522268] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:10,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:10,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 9] total 36 [2025-01-10 01:07:10,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422751626] [2025-01-10 01:07:10,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:10,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-01-10 01:07:10,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:10,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-01-10 01:07:10,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2025-01-10 01:07:10,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:10,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 199 transitions, 2583 flow. Second operand has 37 states, 37 states have (on average 8.027027027027026) internal successors, (297), 37 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:10,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:10,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:10,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:13,168 INFO L124 PetriNetUnfolderBase]: 2044/3367 cut-off events. [2025-01-10 01:07:13,168 INFO L125 PetriNetUnfolderBase]: For 40398/40398 co-relation queries the response was YES. [2025-01-10 01:07:13,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21435 conditions, 3367 events. 2044/3367 cut-off events. For 40398/40398 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18094 event pairs, 39 based on Foata normal form. 1/3368 useless extension candidates. Maximal degree in co-relation 21364. Up to 1669 conditions per place. [2025-01-10 01:07:13,190 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 273 selfloop transitions, 284 changer transitions 2/560 dead transitions. [2025-01-10 01:07:13,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 560 transitions, 7270 flow [2025-01-10 01:07:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-01-10 01:07:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-01-10 01:07:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 619 transitions. [2025-01-10 01:07:13,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33495670995670995 [2025-01-10 01:07:13,194 INFO L175 Difference]: Start difference. First operand has 153 places, 199 transitions, 2583 flow. Second operand 56 states and 619 transitions. [2025-01-10 01:07:13,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 560 transitions, 7270 flow [2025-01-10 01:07:13,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 560 transitions, 7026 flow, removed 12 selfloop flow, removed 8 redundant places. [2025-01-10 01:07:13,271 INFO L231 Difference]: Finished difference. Result has 216 places, 398 transitions, 5994 flow [2025-01-10 01:07:13,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=5994, PETRI_PLACES=216, PETRI_TRANSITIONS=398} [2025-01-10 01:07:13,272 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 182 predicate places. [2025-01-10 01:07:13,272 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 398 transitions, 5994 flow [2025-01-10 01:07:13,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.027027027027026) internal successors, (297), 37 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:13,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:13,272 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:13,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-01-10 01:07:13,472 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,SelfDestructingSolverStorable28 [2025-01-10 01:07:13,473 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:13,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2141112749, now seen corresponding path program 15 times [2025-01-10 01:07:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:13,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011896938] [2025-01-10 01:07:13,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:13,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:13,478 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:07:13,495 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 30 statements. [2025-01-10 01:07:13,495 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:07:13,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:13,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:13,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011896938] [2025-01-10 01:07:13,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011896938] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:13,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496055124] [2025-01-10 01:07:13,730 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:13,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:13,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:13,731 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 01:07:13,732 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 01:07:13,776 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:07:13,795 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 30 statements. [2025-01-10 01:07:13,795 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:07:13,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:13,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-01-10 01:07:13,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:13,814 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 01:07:13,856 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 23 treesize of output 1 [2025-01-10 01:07:13,859 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 19 treesize of output 15 [2025-01-10 01:07:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:07:14,221 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:07:14,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496055124] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:14,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:14,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2025-01-10 01:07:14,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18270254] [2025-01-10 01:07:14,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:14,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-01-10 01:07:14,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:14,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-01-10 01:07:14,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2025-01-10 01:07:14,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:14,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 398 transitions, 5994 flow. Second operand has 44 states, 44 states have (on average 7.75) internal successors, (341), 44 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 01:07:14,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:14,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:14,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:17,398 INFO L124 PetriNetUnfolderBase]: 2799/4638 cut-off events. [2025-01-10 01:07:17,399 INFO L125 PetriNetUnfolderBase]: For 65204/65204 co-relation queries the response was YES. [2025-01-10 01:07:17,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34147 conditions, 4638 events. 2799/4638 cut-off events. For 65204/65204 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26962 event pairs, 57 based on Foata normal form. 2/4640 useless extension candidates. Maximal degree in co-relation 34056. Up to 2471 conditions per place. [2025-01-10 01:07:17,483 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 342 selfloop transitions, 515 changer transitions 5/863 dead transitions. [2025-01-10 01:07:17,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 863 transitions, 13296 flow [2025-01-10 01:07:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-01-10 01:07:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2025-01-10 01:07:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 690 transitions. [2025-01-10 01:07:17,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3318903318903319 [2025-01-10 01:07:17,485 INFO L175 Difference]: Start difference. First operand has 216 places, 398 transitions, 5994 flow. Second operand 63 states and 690 transitions. [2025-01-10 01:07:17,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 863 transitions, 13296 flow [2025-01-10 01:07:17,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 863 transitions, 11455 flow, removed 855 selfloop flow, removed 15 redundant places. [2025-01-10 01:07:17,789 INFO L231 Difference]: Finished difference. Result has 285 places, 713 transitions, 10966 flow [2025-01-10 01:07:17,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=10966, PETRI_PLACES=285, PETRI_TRANSITIONS=713} [2025-01-10 01:07:17,790 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 251 predicate places. [2025-01-10 01:07:17,790 INFO L471 AbstractCegarLoop]: Abstraction has has 285 places, 713 transitions, 10966 flow [2025-01-10 01:07:17,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.75) internal successors, (341), 44 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 01:07:17,791 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:17,791 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:17,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-01-10 01:07:17,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:17,991 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:17,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash -907187779, now seen corresponding path program 16 times [2025-01-10 01:07:17,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:17,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067948893] [2025-01-10 01:07:17,992 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:17,998 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:07:18,005 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:18,006 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:07:18,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:07:18,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:18,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067948893] [2025-01-10 01:07:18,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067948893] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:18,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67845410] [2025-01-10 01:07:18,519 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:18,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:18,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:18,520 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 01:07:18,522 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 01:07:18,560 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:07:18,576 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:18,576 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:07:18,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:18,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-10 01:07:18,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:18,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:18,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:18,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-01-10 01:07:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:18,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67845410] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:18,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:18,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2025-01-10 01:07:18,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077329457] [2025-01-10 01:07:18,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:18,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-10 01:07:18,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:18,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-10 01:07:18,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2025-01-10 01:07:18,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:18,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 713 transitions, 10966 flow. Second operand has 29 states, 29 states have (on average 8.275862068965518) internal successors, (240), 29 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:18,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:18,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:18,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:20,736 INFO L124 PetriNetUnfolderBase]: 3188/5281 cut-off events. [2025-01-10 01:07:20,737 INFO L125 PetriNetUnfolderBase]: For 63670/63670 co-relation queries the response was YES. [2025-01-10 01:07:20,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40366 conditions, 5281 events. 3188/5281 cut-off events. For 63670/63670 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31641 event pairs, 127 based on Foata normal form. 1/5282 useless extension candidates. Maximal degree in co-relation 40252. Up to 3263 conditions per place. [2025-01-10 01:07:20,854 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 515 selfloop transitions, 381 changer transitions 2/899 dead transitions. [2025-01-10 01:07:20,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 899 transitions, 15168 flow [2025-01-10 01:07:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-10 01:07:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-01-10 01:07:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 316 transitions. [2025-01-10 01:07:20,855 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.341991341991342 [2025-01-10 01:07:20,855 INFO L175 Difference]: Start difference. First operand has 285 places, 713 transitions, 10966 flow. Second operand 28 states and 316 transitions. [2025-01-10 01:07:20,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 899 transitions, 15168 flow [2025-01-10 01:07:21,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 899 transitions, 14285 flow, removed 385 selfloop flow, removed 12 redundant places. [2025-01-10 01:07:21,312 INFO L231 Difference]: Finished difference. Result has 305 places, 779 transitions, 12827 flow [2025-01-10 01:07:21,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=10154, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12827, PETRI_PLACES=305, PETRI_TRANSITIONS=779} [2025-01-10 01:07:21,313 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 271 predicate places. [2025-01-10 01:07:21,313 INFO L471 AbstractCegarLoop]: Abstraction has has 305 places, 779 transitions, 12827 flow [2025-01-10 01:07:21,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.275862068965518) internal successors, (240), 29 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:21,314 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:21,314 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:21,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-01-10 01:07:21,514 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,SelfDestructingSolverStorable30 [2025-01-10 01:07:21,514 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:21,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:21,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2014537739, now seen corresponding path program 17 times [2025-01-10 01:07:21,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:21,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247089231] [2025-01-10 01:07:21,515 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:07:21,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:21,522 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:07:21,533 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:21,533 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-10 01:07:21,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:07:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247089231] [2025-01-10 01:07:21,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247089231] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915848903] [2025-01-10 01:07:21,974 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:07:21,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:21,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:21,977 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 01:07:21,978 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 01:07:22,021 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:07:22,048 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:22,049 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-10 01:07:22,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:22,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-10 01:07:22,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:07:22,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:22,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:22,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-01-10 01:07:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:22,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915848903] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:22,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:22,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 25 [2025-01-10 01:07:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897758541] [2025-01-10 01:07:22,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:22,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-10 01:07:22,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:22,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-10 01:07:22,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2025-01-10 01:07:22,564 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-01-10 01:07:22,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 779 transitions, 12827 flow. Second operand has 26 states, 26 states have (on average 10.038461538461538) internal successors, (261), 26 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 01:07:22,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:22,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-01-10 01:07:22,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:23,903 INFO L124 PetriNetUnfolderBase]: 2909/5124 cut-off events. [2025-01-10 01:07:23,903 INFO L125 PetriNetUnfolderBase]: For 82713/82713 co-relation queries the response was YES. [2025-01-10 01:07:23,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42696 conditions, 5124 events. 2909/5124 cut-off events. For 82713/82713 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33501 event pairs, 113 based on Foata normal form. 1/5102 useless extension candidates. Maximal degree in co-relation 42578. Up to 3631 conditions per place. [2025-01-10 01:07:23,950 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 563 selfloop transitions, 112 changer transitions 2/855 dead transitions. [2025-01-10 01:07:23,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 855 transitions, 15223 flow [2025-01-10 01:07:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-10 01:07:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-01-10 01:07:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 210 transitions. [2025-01-10 01:07:23,951 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2025-01-10 01:07:23,951 INFO L175 Difference]: Start difference. First operand has 305 places, 779 transitions, 12827 flow. Second operand 16 states and 210 transitions. [2025-01-10 01:07:23,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 855 transitions, 15223 flow [2025-01-10 01:07:24,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 855 transitions, 14779 flow, removed 111 selfloop flow, removed 20 redundant places. [2025-01-10 01:07:24,404 INFO L231 Difference]: Finished difference. Result has 302 places, 804 transitions, 13310 flow [2025-01-10 01:07:24,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=12393, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13310, PETRI_PLACES=302, PETRI_TRANSITIONS=804} [2025-01-10 01:07:24,405 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 268 predicate places. [2025-01-10 01:07:24,406 INFO L471 AbstractCegarLoop]: Abstraction has has 302 places, 804 transitions, 13310 flow [2025-01-10 01:07:24,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.038461538461538) internal successors, (261), 26 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 01:07:24,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:24,406 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:24,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-01-10 01:07:24,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:24,606 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:24,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1975700013, now seen corresponding path program 18 times [2025-01-10 01:07:24,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:24,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055893391] [2025-01-10 01:07:24,607 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:07:24,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:24,613 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:07:24,619 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-01-10 01:07:24,619 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:07:24,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:24,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:24,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055893391] [2025-01-10 01:07:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055893391] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:24,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972313474] [2025-01-10 01:07:24,941 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:07:24,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:24,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:24,943 INFO L229 MonitoredProcess]: Starting monitored process 25 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 01:07:24,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-01-10 01:07:24,984 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:07:24,999 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-01-10 01:07:24,999 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:07:24,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:25,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-01-10 01:07:25,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:25,033 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 01:07:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:07:25,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:25,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972313474] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:25,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:25,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 33 [2025-01-10 01:07:25,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128360014] [2025-01-10 01:07:25,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:25,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-01-10 01:07:25,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:25,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-01-10 01:07:25,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2025-01-10 01:07:25,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:25,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 804 transitions, 13310 flow. Second operand has 34 states, 34 states have (on average 7.911764705882353) internal successors, (269), 34 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 01:07:25,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:25,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:25,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:27,999 INFO L124 PetriNetUnfolderBase]: 3680/6133 cut-off events. [2025-01-10 01:07:28,000 INFO L125 PetriNetUnfolderBase]: For 84471/84471 co-relation queries the response was YES. [2025-01-10 01:07:28,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49344 conditions, 6133 events. 3680/6133 cut-off events. For 84471/84471 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 37915 event pairs, 100 based on Foata normal form. 2/6135 useless extension candidates. Maximal degree in co-relation 49223. Up to 3493 conditions per place. [2025-01-10 01:07:28,075 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 373 selfloop transitions, 664 changer transitions 5/1043 dead transitions. [2025-01-10 01:07:28,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1043 transitions, 18628 flow [2025-01-10 01:07:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-01-10 01:07:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-01-10 01:07:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 491 transitions. [2025-01-10 01:07:28,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3381542699724518 [2025-01-10 01:07:28,078 INFO L175 Difference]: Start difference. First operand has 302 places, 804 transitions, 13310 flow. Second operand 44 states and 491 transitions. [2025-01-10 01:07:28,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1043 transitions, 18628 flow [2025-01-10 01:07:28,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1043 transitions, 18411 flow, removed 56 selfloop flow, removed 11 redundant places. [2025-01-10 01:07:28,715 INFO L231 Difference]: Finished difference. Result has 345 places, 945 transitions, 18271 flow [2025-01-10 01:07:28,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=13098, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=18271, PETRI_PLACES=345, PETRI_TRANSITIONS=945} [2025-01-10 01:07:28,716 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 311 predicate places. [2025-01-10 01:07:28,716 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 945 transitions, 18271 flow [2025-01-10 01:07:28,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.911764705882353) internal successors, (269), 34 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 01:07:28,716 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:28,716 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:28,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:28,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2025-01-10 01:07:28,917 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:28,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:28,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1067199549, now seen corresponding path program 19 times [2025-01-10 01:07:28,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:28,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186985162] [2025-01-10 01:07:28,918 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:07:28,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:28,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-10 01:07:28,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:28,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:28,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:29,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186985162] [2025-01-10 01:07:29,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186985162] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893150960] [2025-01-10 01:07:29,384 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:07:29,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:29,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:29,386 INFO L229 MonitoredProcess]: Starting monitored process 26 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 01:07:29,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-01-10 01:07:29,427 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-10 01:07:29,442 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:29,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:29,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:29,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-10 01:07:29,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:29,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:29,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:29,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-01-10 01:07:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:29,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893150960] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:29,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:29,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2025-01-10 01:07:29,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207094026] [2025-01-10 01:07:29,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:29,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-10 01:07:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:29,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-10 01:07:29,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2025-01-10 01:07:29,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:07:29,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 945 transitions, 18271 flow. Second operand has 30 states, 30 states have (on average 8.9) internal successors, (267), 30 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 01:07:29,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:29,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:07:29,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:32,913 INFO L124 PetriNetUnfolderBase]: 3879/6664 cut-off events. [2025-01-10 01:07:32,913 INFO L125 PetriNetUnfolderBase]: For 124557/124559 co-relation queries the response was YES. [2025-01-10 01:07:32,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62366 conditions, 6664 events. 3879/6664 cut-off events. For 124557/124559 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 44089 event pairs, 74 based on Foata normal form. 3/6660 useless extension candidates. Maximal degree in co-relation 62232. Up to 3482 conditions per place. [2025-01-10 01:07:32,990 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 427 selfloop transitions, 641 changer transitions 2/1218 dead transitions. [2025-01-10 01:07:32,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1218 transitions, 24928 flow [2025-01-10 01:07:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-01-10 01:07:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-01-10 01:07:32,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 428 transitions. [2025-01-10 01:07:32,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3602693602693603 [2025-01-10 01:07:32,991 INFO L175 Difference]: Start difference. First operand has 345 places, 945 transitions, 18271 flow. Second operand 36 states and 428 transitions. [2025-01-10 01:07:32,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1218 transitions, 24928 flow [2025-01-10 01:07:33,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1218 transitions, 24059 flow, removed 349 selfloop flow, removed 20 redundant places. [2025-01-10 01:07:33,957 INFO L231 Difference]: Finished difference. Result has 373 places, 1120 transitions, 23670 flow [2025-01-10 01:07:33,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17528, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23670, PETRI_PLACES=373, PETRI_TRANSITIONS=1120} [2025-01-10 01:07:33,958 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 339 predicate places. [2025-01-10 01:07:33,958 INFO L471 AbstractCegarLoop]: Abstraction has has 373 places, 1120 transitions, 23670 flow [2025-01-10 01:07:33,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.9) internal successors, (267), 30 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 01:07:33,958 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:33,958 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:33,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-01-10 01:07:34,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-01-10 01:07:34,159 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:34,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:34,159 INFO L85 PathProgramCache]: Analyzing trace with hash -990482349, now seen corresponding path program 20 times [2025-01-10 01:07:34,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:34,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891032344] [2025-01-10 01:07:34,160 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:34,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:34,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:07:34,170 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:34,170 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:34,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:34,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:34,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891032344] [2025-01-10 01:07:34,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891032344] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:34,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237470826] [2025-01-10 01:07:34,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:34,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:34,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:34,715 INFO L229 MonitoredProcess]: Starting monitored process 27 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 01:07:34,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-01-10 01:07:34,757 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:07:34,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:34,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:34,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:34,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-10 01:07:34,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:07:34,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:35,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:35,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-01-10 01:07:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:35,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237470826] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:35,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:35,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 9] total 36 [2025-01-10 01:07:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980875523] [2025-01-10 01:07:35,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:35,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-01-10 01:07:35,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:35,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-01-10 01:07:35,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2025-01-10 01:07:35,301 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:35,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 1120 transitions, 23670 flow. Second operand has 37 states, 37 states have (on average 8.027027027027026) internal successors, (297), 37 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:35,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:35,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:35,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:39,546 INFO L124 PetriNetUnfolderBase]: 5020/8326 cut-off events. [2025-01-10 01:07:39,546 INFO L125 PetriNetUnfolderBase]: For 167979/167979 co-relation queries the response was YES. [2025-01-10 01:07:39,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82067 conditions, 8326 events. 5020/8326 cut-off events. For 167979/167979 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 53555 event pairs, 118 based on Foata normal form. 2/8328 useless extension candidates. Maximal degree in co-relation 81917. Up to 4566 conditions per place. [2025-01-10 01:07:39,650 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 575 selfloop transitions, 986 changer transitions 5/1567 dead transitions. [2025-01-10 01:07:39,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1567 transitions, 35200 flow [2025-01-10 01:07:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-01-10 01:07:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2025-01-10 01:07:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 594 transitions. [2025-01-10 01:07:39,652 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-01-10 01:07:39,652 INFO L175 Difference]: Start difference. First operand has 373 places, 1120 transitions, 23670 flow. Second operand 54 states and 594 transitions. [2025-01-10 01:07:39,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1567 transitions, 35200 flow [2025-01-10 01:07:41,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 1567 transitions, 34553 flow, removed 259 selfloop flow, removed 15 redundant places. [2025-01-10 01:07:41,246 INFO L231 Difference]: Finished difference. Result has 434 places, 1424 transitions, 33924 flow [2025-01-10 01:07:41,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=23059, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=719, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=33924, PETRI_PLACES=434, PETRI_TRANSITIONS=1424} [2025-01-10 01:07:41,247 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 400 predicate places. [2025-01-10 01:07:41,247 INFO L471 AbstractCegarLoop]: Abstraction has has 434 places, 1424 transitions, 33924 flow [2025-01-10 01:07:41,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.027027027027026) internal successors, (297), 37 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:41,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:41,247 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:41,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-01-10 01:07:41,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:41,448 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:41,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1733042067, now seen corresponding path program 21 times [2025-01-10 01:07:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:41,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941250674] [2025-01-10 01:07:41,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:41,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:41,452 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:07:41,458 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 29 of 30 statements. [2025-01-10 01:07:41,459 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-10 01:07:41,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:07:41,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941250674] [2025-01-10 01:07:41,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941250674] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771127267] [2025-01-10 01:07:41,783 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:41,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:41,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:41,785 INFO L229 MonitoredProcess]: Starting monitored process 28 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 01:07:41,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-01-10 01:07:41,830 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:07:41,847 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 29 of 30 statements. [2025-01-10 01:07:41,847 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-10 01:07:41,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:41,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-01-10 01:07:41,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:41,855 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 01:07:41,906 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 19 treesize of output 1 [2025-01-10 01:07:41,908 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 17 treesize of output 13 [2025-01-10 01:07:42,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:42,212 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 15 treesize of output 14 [2025-01-10 01:07:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:07:42,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:07:42,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771127267] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:42,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:42,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2025-01-10 01:07:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048230738] [2025-01-10 01:07:42,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:42,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-01-10 01:07:42,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:42,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-01-10 01:07:42,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2025-01-10 01:07:42,826 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:42,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1424 transitions, 33924 flow. Second operand has 44 states, 44 states have (on average 7.681818181818182) internal successors, (338), 44 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 01:07:42,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:42,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:42,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:51,569 INFO L124 PetriNetUnfolderBase]: 6376/10608 cut-off events. [2025-01-10 01:07:51,569 INFO L125 PetriNetUnfolderBase]: For 257844/257844 co-relation queries the response was YES. [2025-01-10 01:07:51,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114369 conditions, 10608 events. 6376/10608 cut-off events. For 257844/257844 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 71702 event pairs, 90 based on Foata normal form. 3/10611 useless extension candidates. Maximal degree in co-relation 114193. Up to 3960 conditions per place. [2025-01-10 01:07:51,715 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 528 selfloop transitions, 1661 changer transitions 16/2206 dead transitions. [2025-01-10 01:07:51,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 2206 transitions, 54012 flow [2025-01-10 01:07:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2025-01-10 01:07:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2025-01-10 01:07:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 1061 transitions. [2025-01-10 01:07:51,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32807668521954236 [2025-01-10 01:07:51,717 INFO L175 Difference]: Start difference. First operand has 434 places, 1424 transitions, 33924 flow. Second operand 98 states and 1061 transitions. [2025-01-10 01:07:51,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 2206 transitions, 54012 flow [2025-01-10 01:07:54,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 2206 transitions, 51845 flow, removed 934 selfloop flow, removed 16 redundant places. [2025-01-10 01:07:54,805 INFO L231 Difference]: Finished difference. Result has 536 places, 2041 transitions, 52652 flow [2025-01-10 01:07:54,806 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=32371, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=52652, PETRI_PLACES=536, PETRI_TRANSITIONS=2041} [2025-01-10 01:07:54,807 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 502 predicate places. [2025-01-10 01:07:54,807 INFO L471 AbstractCegarLoop]: Abstraction has has 536 places, 2041 transitions, 52652 flow [2025-01-10 01:07:54,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.681818181818182) internal successors, (338), 44 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 01:07:54,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:54,807 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:54,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-01-10 01:07:55,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-01-10 01:07:55,008 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:55,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:55,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1924877429, now seen corresponding path program 22 times [2025-01-10 01:07:55,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:07:55,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444659843] [2025-01-10 01:07:55,009 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:55,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:07:55,014 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:07:55,019 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:55,020 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:07:55,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:07:55,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:07:55,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444659843] [2025-01-10 01:07:55,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444659843] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:55,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713129888] [2025-01-10 01:07:55,403 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:55,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:55,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:55,405 INFO L229 MonitoredProcess]: Starting monitored process 29 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 01:07:55,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-01-10 01:07:55,449 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:07:55,466 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:07:55,467 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:07:55,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:55,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-10 01:07:55,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:55,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:55,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:07:55,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-01-10 01:07:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:07:55,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713129888] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:55,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:07:55,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 30 [2025-01-10 01:07:55,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212849728] [2025-01-10 01:07:55,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:55,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-01-10 01:07:55,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:07:55,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-01-10 01:07:55,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2025-01-10 01:07:55,827 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-01-10 01:07:55,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 2041 transitions, 52652 flow. Second operand has 31 states, 31 states have (on average 8.161290322580646) internal successors, (253), 31 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 01:07:55,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:55,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-01-10 01:07:55,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:08:04,982 INFO L124 PetriNetUnfolderBase]: 8414/13882 cut-off events. [2025-01-10 01:08:04,982 INFO L125 PetriNetUnfolderBase]: For 371573/371573 co-relation queries the response was YES. [2025-01-10 01:08:05,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163163 conditions, 13882 events. 8414/13882 cut-off events. For 371573/371573 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 96815 event pairs, 75 based on Foata normal form. 2/13884 useless extension candidates. Maximal degree in co-relation 162968. Up to 7242 conditions per place. [2025-01-10 01:08:05,224 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 1374 selfloop transitions, 1511 changer transitions 18/2904 dead transitions. [2025-01-10 01:08:05,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 2904 transitions, 79202 flow [2025-01-10 01:08:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-01-10 01:08:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2025-01-10 01:08:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 701 transitions. [2025-01-10 01:08:05,225 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3371813371813372 [2025-01-10 01:08:05,226 INFO L175 Difference]: Start difference. First operand has 536 places, 2041 transitions, 52652 flow. Second operand 63 states and 701 transitions. [2025-01-10 01:08:05,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 2904 transitions, 79202 flow [2025-01-10 01:08:12,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 2904 transitions, 76501 flow, removed 1297 selfloop flow, removed 12 redundant places. [2025-01-10 01:08:12,510 INFO L231 Difference]: Finished difference. Result has 617 places, 2662 transitions, 72880 flow [2025-01-10 01:08:12,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=50505, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2041, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=981, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=72880, PETRI_PLACES=617, PETRI_TRANSITIONS=2662} [2025-01-10 01:08:12,512 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 583 predicate places. [2025-01-10 01:08:12,512 INFO L471 AbstractCegarLoop]: Abstraction has has 617 places, 2662 transitions, 72880 flow [2025-01-10 01:08:12,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.161290322580646) internal successors, (253), 31 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 01:08:12,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:08:12,513 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:08:12,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-01-10 01:08:12,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-01-10 01:08:12,713 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:08:12,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:08:12,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1021928549, now seen corresponding path program 23 times [2025-01-10 01:08:12,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:08:12,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594830379] [2025-01-10 01:08:12,714 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:08:12,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:08:12,719 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:08:12,730 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:08:12,730 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-10 01:08:12,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:08:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:08:13,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:08:13,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594830379] [2025-01-10 01:08:13,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594830379] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:08:13,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090414845] [2025-01-10 01:08:13,051 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:08:13,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:08:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:08:13,053 INFO L229 MonitoredProcess]: Starting monitored process 30 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 01:08:13,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-01-10 01:08:13,104 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-01-10 01:08:13,124 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:08:13,124 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-10 01:08:13,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:08:13,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-10 01:08:13,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:08:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:08:13,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:08:13,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:08:13,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-01-10 01:08:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:08:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090414845] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:08:13,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:08:13,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 30 [2025-01-10 01:08:13,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019838349] [2025-01-10 01:08:13,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:08:13,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-01-10 01:08:13,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:08:13,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-01-10 01:08:13,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2025-01-10 01:08:13,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-01-10 01:08:13,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 2662 transitions, 72880 flow. Second operand has 31 states, 31 states have (on average 9.096774193548388) internal successors, (282), 31 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 01:08:13,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:08:13,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-01-10 01:08:13,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand