./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-array-int-symm.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/chl-array-int-symm.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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:01:34,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:01:34,348 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:01:34,355 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:01:34,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:01:34,379 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:01:34,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:01:34,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:01:34,380 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:01:34,381 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:01:34,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:01:34,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:01:34,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:01:34,381 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:01:34,381 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:01:34,382 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:01:34,382 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:01:34,382 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:01:34,382 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:01:34,382 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:01:34,382 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:01:34,382 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:01:34,382 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:01:34,383 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:01:34,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:01:34,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:01:34,384 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:01:34,384 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:01:34,384 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:01:34,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:01:34,384 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:01:34,384 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:01:34,385 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:01:34,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:01:34,385 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:01:34,385 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:01:34,385 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:01:34,385 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:01:34,385 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 -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2025-01-10 01:01:34,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:01:34,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:01:34,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:01:34,661 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:01:34,661 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:01:34,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2025-01-10 01:01:35,239 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f0a77d51/f0138bfaecd7456694ae7294e3119691/FLAGb1a70b45f [2025-01-10 01:01:36,934 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:01:36,935 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2025-01-10 01:01:36,944 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f0a77d51/f0138bfaecd7456694ae7294e3119691/FLAGb1a70b45f [2025-01-10 01:01:36,962 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f0a77d51/f0138bfaecd7456694ae7294e3119691 [2025-01-10 01:01:36,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:01:36,966 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:01:36,969 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:01:36,970 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:01:36,974 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:01:36,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:01:36" (1/1) ... [2025-01-10 01:01:36,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35249644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:36, skipping insertion in model container [2025-01-10 01:01:36,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:01:36" (1/1) ... [2025-01-10 01:01:37,000 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:01:37,160 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 01:01:37,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:01:37,172 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:01:37,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:01:37,210 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:01:37,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37 WrapperNode [2025-01-10 01:01:37,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:01:37,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:01:37,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:01:37,212 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:01:37,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,226 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,249 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 183 [2025-01-10 01:01:37,250 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:01:37,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:01:37,250 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:01:37,251 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:01:37,259 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,267 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,296 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-01-10 01:01:37,296 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,296 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,307 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,320 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,321 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:01:37,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:01:37,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:01:37,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:01:37,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (1/1) ... [2025-01-10 01:01:37,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:01:37,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:37,360 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 01:01:37,364 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 01:01:37,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:01:37,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:01:37,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:01:37,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:01:37,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:01:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:01:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:01:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:01:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:01:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:01:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:01:37,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:01:37,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:01:37,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:01:37,389 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 01:01:37,492 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:01:37,494 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:01:37,864 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:01:37,864 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:01:38,120 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:01:38,121 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:01:38,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:01:38 BoogieIcfgContainer [2025-01-10 01:01:38,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:01:38,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:01:38,123 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:01:38,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:01:38,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:01:36" (1/3) ... [2025-01-10 01:01:38,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4668b5bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:01:38, skipping insertion in model container [2025-01-10 01:01:38,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:37" (2/3) ... [2025-01-10 01:01:38,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4668b5bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:01:38, skipping insertion in model container [2025-01-10 01:01:38,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:01:38" (3/3) ... [2025-01-10 01:01:38,132 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2025-01-10 01:01:38,143 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:01:38,145 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-symm.wvr.c that has 3 procedures, 55 locations, 1 initial locations, 4 loop locations, and 22 error locations. [2025-01-10 01:01:38,145 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:01:38,216 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-10 01:01:38,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 60 transitions, 134 flow [2025-01-10 01:01:38,284 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2025-01-10 01:01:38,287 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 01:01:38,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 58 events. 6/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 160 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2025-01-10 01:01:38,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 60 transitions, 134 flow [2025-01-10 01:01:38,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 126 flow [2025-01-10 01:01:38,302 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:01:38,315 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;@3f99b446, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:01:38,315 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2025-01-10 01:01:38,319 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:01:38,319 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-10 01:01:38,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:01:38,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:38,320 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:01:38,320 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:38,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash 621149, now seen corresponding path program 1 times [2025-01-10 01:01:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:38,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430952847] [2025-01-10 01:01:38,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:38,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:38,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:01:38,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:01:38,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:38,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:38,559 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 01:01:38,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:38,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430952847] [2025-01-10 01:01:38,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430952847] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:38,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:38,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:01:38,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648661428] [2025-01-10 01:01:38,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:38,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:01:38,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:38,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:01:38,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:01:38,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-01-10 01:01:38,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 01:01:38,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:38,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-01-10 01:01:38,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:38,791 INFO L124 PetriNetUnfolderBase]: 100/283 cut-off events. [2025-01-10 01:01:38,792 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-01-10 01:01:38,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 283 events. 100/283 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1439 event pairs, 54 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 413. Up to 158 conditions per place. [2025-01-10 01:01:38,797 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 22 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2025-01-10 01:01:38,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 166 flow [2025-01-10 01:01:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:01:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:01:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2025-01-10 01:01:38,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2025-01-10 01:01:38,810 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 3 states and 123 transitions. [2025-01-10 01:01:38,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 166 flow [2025-01-10 01:01:38,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:01:38,818 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 114 flow [2025-01-10 01:01:38,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2025-01-10 01:01:38,823 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2025-01-10 01:01:38,826 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 114 flow [2025-01-10 01:01:38,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 01:01:38,827 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:38,827 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:01:38,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:01:38,827 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:38,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:38,827 INFO L85 PathProgramCache]: Analyzing trace with hash 621150, now seen corresponding path program 1 times [2025-01-10 01:01:38,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:38,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787291360] [2025-01-10 01:01:38,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:38,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:01:38,864 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:01:38,867 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:38,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:39,180 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 01:01:39,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:39,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787291360] [2025-01-10 01:01:39,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787291360] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:39,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:39,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:01:39,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338131627] [2025-01-10 01:01:39,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:39,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:01:39,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:39,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:01:39,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:01:39,266 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-01-10 01:01:39,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 01:01:39,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:39,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-01-10 01:01:39,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:39,428 INFO L124 PetriNetUnfolderBase]: 100/282 cut-off events. [2025-01-10 01:01:39,428 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:01:39,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 282 events. 100/282 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1431 event pairs, 54 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 436. Up to 162 conditions per place. [2025-01-10 01:01:39,432 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 21 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2025-01-10 01:01:39,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 162 flow [2025-01-10 01:01:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:01:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:01:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2025-01-10 01:01:39,436 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2025-01-10 01:01:39,436 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 114 flow. Second operand 4 states and 154 transitions. [2025-01-10 01:01:39,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 162 flow [2025-01-10 01:01:39,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:01:39,439 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 116 flow [2025-01-10 01:01:39,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2025-01-10 01:01:39,440 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2025-01-10 01:01:39,440 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 116 flow [2025-01-10 01:01:39,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 01:01:39,441 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:39,441 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-01-10 01:01:39,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:01:39,442 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:39,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash 19257321, now seen corresponding path program 1 times [2025-01-10 01:01:39,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:39,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883233096] [2025-01-10 01:01:39,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:39,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:39,452 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-01-10 01:01:39,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-01-10 01:01:39,474 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:39,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:39,700 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 01:01:39,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:39,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883233096] [2025-01-10 01:01:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883233096] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:39,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:39,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:01:39,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310644518] [2025-01-10 01:01:39,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:39,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:01:39,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:39,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:01:39,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:01:39,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-01-10 01:01:39,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 01:01:39,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:39,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-01-10 01:01:39,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:39,955 INFO L124 PetriNetUnfolderBase]: 102/288 cut-off events. [2025-01-10 01:01:39,955 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:01:39,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 288 events. 102/288 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1454 event pairs, 54 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 450. Up to 165 conditions per place. [2025-01-10 01:01:39,958 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 24 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2025-01-10 01:01:39,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 58 transitions, 196 flow [2025-01-10 01:01:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:01:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:01:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2025-01-10 01:01:39,960 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2025-01-10 01:01:39,960 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 116 flow. Second operand 5 states and 192 transitions. [2025-01-10 01:01:39,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 58 transitions, 196 flow [2025-01-10 01:01:39,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 58 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:01:39,965 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 161 flow [2025-01-10 01:01:39,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2025-01-10 01:01:39,966 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2025-01-10 01:01:39,966 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 161 flow [2025-01-10 01:01:39,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 01:01:39,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:39,967 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-01-10 01:01:39,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-10 01:01:39,967 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:39,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1326436320, now seen corresponding path program 1 times [2025-01-10 01:01:39,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:39,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598386593] [2025-01-10 01:01:39,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:39,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:01:39,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:01:39,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:39,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:40,265 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 01:01:40,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:40,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598386593] [2025-01-10 01:01:40,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598386593] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:40,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848744151] [2025-01-10 01:01:40,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:40,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:40,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:40,271 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 01:01:40,273 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 01:01:40,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:01:40,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:01:40,347 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:40,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:40,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:01:40,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:40,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-01-10 01:01:40,633 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 01:01:40,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:40,901 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 01:01:40,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848744151] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:01:40,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:01:40,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-01-10 01:01:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240864650] [2025-01-10 01:01:40,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:01:40,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:01:40,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:40,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:01:40,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:01:41,525 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-01-10 01:01:41,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 161 flow. Second operand has 13 states, 13 states have (on average 33.30769230769231) internal successors, (433), 13 states have internal predecessors, (433), 0 states have call successors, (0), 0 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 01:01:41,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:41,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-01-10 01:01:41,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:41,854 INFO L124 PetriNetUnfolderBase]: 102/287 cut-off events. [2025-01-10 01:01:41,855 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-01-10 01:01:41,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 287 events. 102/287 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1445 event pairs, 54 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 446. Up to 158 conditions per place. [2025-01-10 01:01:41,859 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 18 selfloop transitions, 12 changer transitions 0/57 dead transitions. [2025-01-10 01:01:41,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 217 flow [2025-01-10 01:01:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:01:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:01:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 255 transitions. [2025-01-10 01:01:41,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2025-01-10 01:01:41,864 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 161 flow. Second operand 7 states and 255 transitions. [2025-01-10 01:01:41,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 217 flow [2025-01-10 01:01:41,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 57 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:01:41,866 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 180 flow [2025-01-10 01:01:41,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2025-01-10 01:01:41,868 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2025-01-10 01:01:41,868 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 180 flow [2025-01-10 01:01:41,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 33.30769230769231) internal successors, (433), 13 states have internal predecessors, (433), 0 states have call successors, (0), 0 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 01:01:41,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:41,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:41,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-10 01:01:42,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:42,073 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:42,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:42,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1826959424, now seen corresponding path program 1 times [2025-01-10 01:01:42,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:42,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329802412] [2025-01-10 01:01:42,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:42,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:42,084 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 01:01:42,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 01:01:42,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:42,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:42,171 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 01:01:42,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:42,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329802412] [2025-01-10 01:01:42,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329802412] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:42,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:42,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:01:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662088377] [2025-01-10 01:01:42,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:42,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:01:42,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:42,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:01:42,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:01:42,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-01-10 01:01:42,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 01:01:42,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:42,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-01-10 01:01:42,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:42,402 INFO L124 PetriNetUnfolderBase]: 165/503 cut-off events. [2025-01-10 01:01:42,403 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-10 01:01:42,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 503 events. 165/503 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3041 event pairs, 71 based on Foata normal form. 12/350 useless extension candidates. Maximal degree in co-relation 555. Up to 188 conditions per place. [2025-01-10 01:01:42,407 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 51 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2025-01-10 01:01:42,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 389 flow [2025-01-10 01:01:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:01:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:01:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 254 transitions. [2025-01-10 01:01:42,409 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7055555555555556 [2025-01-10 01:01:42,409 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 180 flow. Second operand 6 states and 254 transitions. [2025-01-10 01:01:42,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 389 flow [2025-01-10 01:01:42,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 340 flow, removed 8 selfloop flow, removed 6 redundant places. [2025-01-10 01:01:42,413 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 206 flow [2025-01-10 01:01:42,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=206, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2025-01-10 01:01:42,415 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2025-01-10 01:01:42,415 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 206 flow [2025-01-10 01:01:42,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 01:01:42,416 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:42,416 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:42,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-10 01:01:42,416 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:42,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:42,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1491869203, now seen corresponding path program 1 times [2025-01-10 01:01:42,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:42,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321786432] [2025-01-10 01:01:42,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:42,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:42,422 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-10 01:01:42,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-10 01:01:42,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:42,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:42,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:42,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321786432] [2025-01-10 01:01:42,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321786432] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:42,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:42,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:01:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544489337] [2025-01-10 01:01:42,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:42,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:01:42,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:42,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:01:42,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:01:42,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-01-10 01:01:42,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:01:42,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:42,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-01-10 01:01:42,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:42,704 INFO L124 PetriNetUnfolderBase]: 259/763 cut-off events. [2025-01-10 01:01:42,705 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2025-01-10 01:01:42,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1356 conditions, 763 events. 259/763 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5149 event pairs, 108 based on Foata normal form. 12/551 useless extension candidates. Maximal degree in co-relation 800. Up to 276 conditions per place. [2025-01-10 01:01:42,710 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 51 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2025-01-10 01:01:42,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 381 flow [2025-01-10 01:01:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:01:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:01:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2025-01-10 01:01:42,712 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.72 [2025-01-10 01:01:42,712 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 206 flow. Second operand 5 states and 216 transitions. [2025-01-10 01:01:42,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 381 flow [2025-01-10 01:01:42,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 85 transitions, 377 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-01-10 01:01:42,717 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 240 flow [2025-01-10 01:01:42,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2025-01-10 01:01:42,719 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2025-01-10 01:01:42,720 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 240 flow [2025-01-10 01:01:42,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:01:42,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:42,720 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:42,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-10 01:01:42,721 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:42,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:42,722 INFO L85 PathProgramCache]: Analyzing trace with hash 927364835, now seen corresponding path program 1 times [2025-01-10 01:01:42,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:42,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506386721] [2025-01-10 01:01:42,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:42,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:42,728 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-10 01:01:42,732 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-10 01:01:42,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:42,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:42,785 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 01:01:42,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:42,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506386721] [2025-01-10 01:01:42,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506386721] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:42,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:42,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:01:42,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917822864] [2025-01-10 01:01:42,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:42,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:01:42,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:42,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:01:42,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:01:42,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-01-10 01:01:42,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:01:42,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:42,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-01-10 01:01:42,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:42,975 INFO L124 PetriNetUnfolderBase]: 212/629 cut-off events. [2025-01-10 01:01:42,976 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2025-01-10 01:01:42,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 629 events. 212/629 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4021 event pairs, 115 based on Foata normal form. 14/481 useless extension candidates. Maximal degree in co-relation 728. Up to 287 conditions per place. [2025-01-10 01:01:42,980 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 47 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2025-01-10 01:01:42,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 407 flow [2025-01-10 01:01:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:01:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:01:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 247 transitions. [2025-01-10 01:01:42,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6861111111111111 [2025-01-10 01:01:42,982 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 240 flow. Second operand 6 states and 247 transitions. [2025-01-10 01:01:42,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 407 flow [2025-01-10 01:01:42,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 397 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:01:42,985 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 258 flow [2025-01-10 01:01:42,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2025-01-10 01:01:42,988 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2025-01-10 01:01:42,988 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 258 flow [2025-01-10 01:01:42,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:01:42,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:42,988 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:42,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-10 01:01:42,990 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:42,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2068249430, now seen corresponding path program 1 times [2025-01-10 01:01:42,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:42,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668949936] [2025-01-10 01:01:42,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:42,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:01:43,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:01:43,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:43,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:43,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:43,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668949936] [2025-01-10 01:01:43,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668949936] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:43,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:43,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:01:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936969354] [2025-01-10 01:01:43,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:43,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:01:43,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:43,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:01:43,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:01:43,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-01-10 01:01:43,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:01:43,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:43,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-01-10 01:01:43,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:43,341 INFO L124 PetriNetUnfolderBase]: 252/699 cut-off events. [2025-01-10 01:01:43,342 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2025-01-10 01:01:43,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 699 events. 252/699 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4339 event pairs, 179 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 1048. Up to 447 conditions per place. [2025-01-10 01:01:43,349 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 35 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2025-01-10 01:01:43,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 332 flow [2025-01-10 01:01:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:01:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:01:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2025-01-10 01:01:43,351 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-01-10 01:01:43,351 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 258 flow. Second operand 5 states and 156 transitions. [2025-01-10 01:01:43,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 332 flow [2025-01-10 01:01:43,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:01:43,355 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 252 flow [2025-01-10 01:01:43,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2025-01-10 01:01:43,356 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2025-01-10 01:01:43,358 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 252 flow [2025-01-10 01:01:43,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:01:43,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:43,358 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:43,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-10 01:01:43,358 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:43,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2068249431, now seen corresponding path program 1 times [2025-01-10 01:01:43,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:43,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753717966] [2025-01-10 01:01:43,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:43,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:01:43,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:01:43,381 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:43,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:43,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:43,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753717966] [2025-01-10 01:01:43,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753717966] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:43,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565690111] [2025-01-10 01:01:43,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:43,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:43,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:43,569 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 01:01:43,570 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 01:01:43,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:01:43,638 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:01:43,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:43,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:43,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-10 01:01:43,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:43,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:01:43,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:01:43,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-10 01:01:43,710 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:01:43,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-10 01:01:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:43,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:43,891 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 52 treesize of output 48 [2025-01-10 01:01:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565690111] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:01:43,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:01:43,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-01-10 01:01:43,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206821767] [2025-01-10 01:01:43,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:01:43,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:01:43,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:43,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:01:43,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:01:44,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:01:44,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 252 flow. Second operand has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 01:01:44,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:44,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:01:44,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:45,238 INFO L124 PetriNetUnfolderBase]: 393/925 cut-off events. [2025-01-10 01:01:45,238 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2025-01-10 01:01:45,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1922 conditions, 925 events. 393/925 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5279 event pairs, 109 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 1263. Up to 256 conditions per place. [2025-01-10 01:01:45,244 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 67 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2025-01-10 01:01:45,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 512 flow [2025-01-10 01:01:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:01:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:01:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 334 transitions. [2025-01-10 01:01:45,247 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2025-01-10 01:01:45,247 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 252 flow. Second operand 9 states and 334 transitions. [2025-01-10 01:01:45,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 512 flow [2025-01-10 01:01:45,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 502 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:01:45,249 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 292 flow [2025-01-10 01:01:45,252 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=292, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2025-01-10 01:01:45,253 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2025-01-10 01:01:45,253 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 292 flow [2025-01-10 01:01:45,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 01:01:45,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:45,254 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:45,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-10 01:01:45,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:45,458 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:45,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash 826520017, now seen corresponding path program 1 times [2025-01-10 01:01:45,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:45,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071892848] [2025-01-10 01:01:45,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:45,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:45,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:01:45,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:01:45,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:45,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:45,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:45,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071892848] [2025-01-10 01:01:45,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071892848] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:45,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:45,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:01:45,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165159651] [2025-01-10 01:01:45,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:45,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:01:45,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:45,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:01:45,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:01:45,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-01-10 01:01:45,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 01:01:45,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:45,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-01-10 01:01:45,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:45,685 INFO L124 PetriNetUnfolderBase]: 289/804 cut-off events. [2025-01-10 01:01:45,685 INFO L125 PetriNetUnfolderBase]: For 543/546 co-relation queries the response was YES. [2025-01-10 01:01:45,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 804 events. 289/804 cut-off events. For 543/546 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4923 event pairs, 182 based on Foata normal form. 7/645 useless extension candidates. Maximal degree in co-relation 1138. Up to 428 conditions per place. [2025-01-10 01:01:45,690 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 49 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2025-01-10 01:01:45,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 467 flow [2025-01-10 01:01:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:01:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:01:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 209 transitions. [2025-01-10 01:01:45,691 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6966666666666667 [2025-01-10 01:01:45,691 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 292 flow. Second operand 5 states and 209 transitions. [2025-01-10 01:01:45,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 467 flow [2025-01-10 01:01:45,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 454 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-01-10 01:01:45,694 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 319 flow [2025-01-10 01:01:45,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2025-01-10 01:01:45,695 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 22 predicate places. [2025-01-10 01:01:45,695 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 319 flow [2025-01-10 01:01:45,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 01:01:45,695 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:45,696 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:45,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-01-10 01:01:45,696 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:45,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:45,696 INFO L85 PathProgramCache]: Analyzing trace with hash -308776508, now seen corresponding path program 1 times [2025-01-10 01:01:45,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:45,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325003691] [2025-01-10 01:01:45,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:45,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:45,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 01:01:45,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 01:01:45,706 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:45,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:45,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:45,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325003691] [2025-01-10 01:01:45,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325003691] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:45,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:45,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:01:45,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140523674] [2025-01-10 01:01:45,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:45,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:01:45,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:45,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:01:45,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:01:45,806 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-01-10 01:01:45,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 01:01:45,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:45,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-01-10 01:01:45,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:45,951 INFO L124 PetriNetUnfolderBase]: 390/938 cut-off events. [2025-01-10 01:01:45,952 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2025-01-10 01:01:45,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2104 conditions, 938 events. 390/938 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5358 event pairs, 301 based on Foata normal form. 0/893 useless extension candidates. Maximal degree in co-relation 1712. Up to 684 conditions per place. [2025-01-10 01:01:45,958 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 40 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-01-10 01:01:45,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 61 transitions, 401 flow [2025-01-10 01:01:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:01:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:01:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2025-01-10 01:01:45,959 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2025-01-10 01:01:45,959 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 319 flow. Second operand 4 states and 131 transitions. [2025-01-10 01:01:45,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 61 transitions, 401 flow [2025-01-10 01:01:45,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 61 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:01:45,962 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 311 flow [2025-01-10 01:01:45,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2025-01-10 01:01:45,963 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 19 predicate places. [2025-01-10 01:01:45,963 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 311 flow [2025-01-10 01:01:45,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 01:01:45,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:45,963 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:45,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-01-10 01:01:45,964 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:45,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash -308776507, now seen corresponding path program 1 times [2025-01-10 01:01:45,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:45,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926574733] [2025-01-10 01:01:45,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:45,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:45,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 01:01:45,976 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 01:01:45,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:45,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:46,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926574733] [2025-01-10 01:01:46,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926574733] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266795055] [2025-01-10 01:01:46,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:46,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:46,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:46,138 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 01:01:46,140 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 01:01:46,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 01:01:46,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 01:01:46,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:46,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:46,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:01:46,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:46,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:46,326 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 01:01:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:46,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266795055] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:01:46,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:01:46,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-01-10 01:01:46,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108159441] [2025-01-10 01:01:46,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:01:46,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:01:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:46,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:01:46,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:01:46,748 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2025-01-10 01:01:46,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 311 flow. Second operand has 11 states, 11 states have (on average 32.72727272727273) internal successors, (360), 11 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 01:01:46,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:46,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2025-01-10 01:01:46,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:47,034 INFO L124 PetriNetUnfolderBase]: 318/746 cut-off events. [2025-01-10 01:01:47,034 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2025-01-10 01:01:47,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 746 events. 318/746 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4036 event pairs, 102 based on Foata normal form. 0/678 useless extension candidates. Maximal degree in co-relation 1368. Up to 193 conditions per place. [2025-01-10 01:01:47,039 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 67 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2025-01-10 01:01:47,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 569 flow [2025-01-10 01:01:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:01:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:01:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 291 transitions. [2025-01-10 01:01:47,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6928571428571428 [2025-01-10 01:01:47,042 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 311 flow. Second operand 7 states and 291 transitions. [2025-01-10 01:01:47,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 569 flow [2025-01-10 01:01:47,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 97 transitions, 563 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:01:47,045 INFO L231 Difference]: Finished difference. Result has 82 places, 61 transitions, 347 flow [2025-01-10 01:01:47,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=82, PETRI_TRANSITIONS=61} [2025-01-10 01:01:47,046 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2025-01-10 01:01:47,047 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 61 transitions, 347 flow [2025-01-10 01:01:47,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 32.72727272727273) internal successors, (360), 11 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 01:01:47,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:47,047 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:47,056 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 01:01:47,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:47,248 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:47,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:47,251 INFO L85 PathProgramCache]: Analyzing trace with hash -988408582, now seen corresponding path program 1 times [2025-01-10 01:01:47,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:47,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583530536] [2025-01-10 01:01:47,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:47,257 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 01:01:47,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:01:47,263 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:47,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:47,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:47,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583530536] [2025-01-10 01:01:47,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583530536] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:47,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547941963] [2025-01-10 01:01:47,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:47,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:47,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:47,440 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 01:01:47,442 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 01:01:47,490 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 01:01:47,507 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:01:47,507 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:47,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:47,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-10 01:01:47,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:47,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:01:47,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:01:47,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-10 01:01:47,567 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:01:47,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-10 01:01:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:47,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:47,714 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 52 treesize of output 48 [2025-01-10 01:01:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:47,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547941963] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:01:47,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:01:47,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-01-10 01:01:47,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303751676] [2025-01-10 01:01:47,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:01:47,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:01:47,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:47,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:01:47,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:01:48,515 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-01-10 01:01:48,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 61 transitions, 347 flow. Second operand has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 01:01:48,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:48,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-01-10 01:01:48,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:48,937 INFO L124 PetriNetUnfolderBase]: 533/1288 cut-off events. [2025-01-10 01:01:48,939 INFO L125 PetriNetUnfolderBase]: For 1677/1731 co-relation queries the response was YES. [2025-01-10 01:01:48,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 1288 events. 533/1288 cut-off events. For 1677/1731 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8128 event pairs, 171 based on Foata normal form. 0/1122 useless extension candidates. Maximal degree in co-relation 2552. Up to 296 conditions per place. [2025-01-10 01:01:48,947 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 67 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2025-01-10 01:01:48,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 97 transitions, 647 flow [2025-01-10 01:01:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:01:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:01:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 337 transitions. [2025-01-10 01:01:48,949 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6240740740740741 [2025-01-10 01:01:48,949 INFO L175 Difference]: Start difference. First operand has 82 places, 61 transitions, 347 flow. Second operand 9 states and 337 transitions. [2025-01-10 01:01:48,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 97 transitions, 647 flow [2025-01-10 01:01:48,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 97 transitions, 614 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-01-10 01:01:48,954 INFO L231 Difference]: Finished difference. Result has 86 places, 62 transitions, 365 flow [2025-01-10 01:01:48,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=365, PETRI_PLACES=86, PETRI_TRANSITIONS=62} [2025-01-10 01:01:48,955 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 28 predicate places. [2025-01-10 01:01:48,955 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 62 transitions, 365 flow [2025-01-10 01:01:48,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 01:01:48,956 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:48,956 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:48,964 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 01:01:49,160 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,SelfDestructingSolverStorable12 [2025-01-10 01:01:49,160 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:49,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:49,161 INFO L85 PathProgramCache]: Analyzing trace with hash -575894380, now seen corresponding path program 1 times [2025-01-10 01:01:49,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:49,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630774739] [2025-01-10 01:01:49,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:49,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:49,167 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:01:49,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:01:49,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:49,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:49,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630774739] [2025-01-10 01:01:49,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630774739] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001726638] [2025-01-10 01:01:49,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:49,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:49,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:49,341 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 01:01:49,343 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 01:01:49,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:01:49,410 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:01:49,411 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:49,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:49,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:01:49,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:49,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:49,531 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 22 treesize of output 18 [2025-01-10 01:01:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001726638] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:01:49,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:01:49,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-01-10 01:01:49,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806204517] [2025-01-10 01:01:49,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:01:49,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:01:49,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:49,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:01:49,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:01:49,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:01:49,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 62 transitions, 365 flow. Second operand has 11 states, 11 states have (on average 32.09090909090909) internal successors, (353), 11 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 01:01:49,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:49,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:01:49,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:50,165 INFO L124 PetriNetUnfolderBase]: 603/1275 cut-off events. [2025-01-10 01:01:50,165 INFO L125 PetriNetUnfolderBase]: For 1874/1943 co-relation queries the response was YES. [2025-01-10 01:01:50,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3254 conditions, 1275 events. 603/1275 cut-off events. For 1874/1943 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7445 event pairs, 170 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 2856. Up to 353 conditions per place. [2025-01-10 01:01:50,173 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 68 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2025-01-10 01:01:50,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 97 transitions, 657 flow [2025-01-10 01:01:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:01:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:01:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 282 transitions. [2025-01-10 01:01:50,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2025-01-10 01:01:50,175 INFO L175 Difference]: Start difference. First operand has 86 places, 62 transitions, 365 flow. Second operand 7 states and 282 transitions. [2025-01-10 01:01:50,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 97 transitions, 657 flow [2025-01-10 01:01:50,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 97 transitions, 631 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-01-10 01:01:50,179 INFO L231 Difference]: Finished difference. Result has 87 places, 62 transitions, 381 flow [2025-01-10 01:01:50,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=87, PETRI_TRANSITIONS=62} [2025-01-10 01:01:50,181 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 29 predicate places. [2025-01-10 01:01:50,181 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 62 transitions, 381 flow [2025-01-10 01:01:50,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 32.09090909090909) internal successors, (353), 11 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 01:01:50,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:50,181 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:50,189 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 01:01:50,386 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,SelfDestructingSolverStorable13 [2025-01-10 01:01:50,386 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:50,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:50,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1059599677, now seen corresponding path program 1 times [2025-01-10 01:01:50,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:50,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932140194] [2025-01-10 01:01:50,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:50,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:01:50,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:01:50,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:50,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:50,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:50,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932140194] [2025-01-10 01:01:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932140194] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:50,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7216980] [2025-01-10 01:01:50,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:50,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:50,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:50,473 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 01:01:50,475 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 01:01:50,526 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:01:50,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:01:50,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:50,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:50,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:01:50,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:50,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:50,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7216980] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:01:50,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:01:50,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-01-10 01:01:50,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897805888] [2025-01-10 01:01:50,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:01:50,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:01:50,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:50,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:01:50,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:01:51,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-01-10 01:01:51,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 62 transitions, 381 flow. Second operand has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 01:01:51,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:51,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-01-10 01:01:51,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:51,678 INFO L124 PetriNetUnfolderBase]: 1335/3147 cut-off events. [2025-01-10 01:01:51,679 INFO L125 PetriNetUnfolderBase]: For 5194/5329 co-relation queries the response was YES. [2025-01-10 01:01:51,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8246 conditions, 3147 events. 1335/3147 cut-off events. For 5194/5329 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 24317 event pairs, 417 based on Foata normal form. 66/3139 useless extension candidates. Maximal degree in co-relation 3410. Up to 715 conditions per place. [2025-01-10 01:01:51,701 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 159 selfloop transitions, 36 changer transitions 0/213 dead transitions. [2025-01-10 01:01:51,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 213 transitions, 1573 flow [2025-01-10 01:01:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-10 01:01:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-01-10 01:01:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 858 transitions. [2025-01-10 01:01:51,705 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.680952380952381 [2025-01-10 01:01:51,706 INFO L175 Difference]: Start difference. First operand has 87 places, 62 transitions, 381 flow. Second operand 21 states and 858 transitions. [2025-01-10 01:01:51,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 213 transitions, 1573 flow [2025-01-10 01:01:51,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 213 transitions, 1499 flow, removed 14 selfloop flow, removed 5 redundant places. [2025-01-10 01:01:51,717 INFO L231 Difference]: Finished difference. Result has 108 places, 86 transitions, 678 flow [2025-01-10 01:01:51,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=678, PETRI_PLACES=108, PETRI_TRANSITIONS=86} [2025-01-10 01:01:51,718 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 50 predicate places. [2025-01-10 01:01:51,718 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 86 transitions, 678 flow [2025-01-10 01:01:51,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 01:01:51,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:51,719 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:51,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-10 01:01:51,923 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,SelfDestructingSolverStorable14 [2025-01-10 01:01:51,923 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:51,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:51,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1925462496, now seen corresponding path program 1 times [2025-01-10 01:01:51,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:51,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789331946] [2025-01-10 01:01:51,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:51,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:51,929 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 01:01:51,938 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:01:51,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:51,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:52,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:52,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789331946] [2025-01-10 01:01:52,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789331946] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:52,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969130123] [2025-01-10 01:01:52,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:52,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:52,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:52,012 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 01:01:52,014 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 01:01:52,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 01:01:52,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:01:52,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:52,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:52,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:01:52,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:52,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969130123] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:01:52,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:01:52,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-01-10 01:01:52,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813077631] [2025-01-10 01:01:52,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:01:52,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:01:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:52,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:01:52,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:01:52,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-01-10 01:01:52,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 86 transitions, 678 flow. Second operand has 16 states, 16 states have (on average 35.25) internal successors, (564), 16 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 01:01:52,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:52,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-01-10 01:01:52,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:53,134 INFO L124 PetriNetUnfolderBase]: 1069/2490 cut-off events. [2025-01-10 01:01:53,134 INFO L125 PetriNetUnfolderBase]: For 6028/6223 co-relation queries the response was YES. [2025-01-10 01:01:53,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6801 conditions, 2490 events. 1069/2490 cut-off events. For 6028/6223 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18054 event pairs, 430 based on Foata normal form. 48/2487 useless extension candidates. Maximal degree in co-relation 3152. Up to 734 conditions per place. [2025-01-10 01:01:53,156 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 133 selfloop transitions, 44 changer transitions 0/195 dead transitions. [2025-01-10 01:01:53,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 195 transitions, 1550 flow [2025-01-10 01:01:53,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-10 01:01:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-01-10 01:01:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 948 transitions. [2025-01-10 01:01:53,160 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2025-01-10 01:01:53,160 INFO L175 Difference]: Start difference. First operand has 108 places, 86 transitions, 678 flow. Second operand 24 states and 948 transitions. [2025-01-10 01:01:53,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 195 transitions, 1550 flow [2025-01-10 01:01:53,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 195 transitions, 1530 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-01-10 01:01:53,170 INFO L231 Difference]: Finished difference. Result has 133 places, 97 transitions, 885 flow [2025-01-10 01:01:53,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=885, PETRI_PLACES=133, PETRI_TRANSITIONS=97} [2025-01-10 01:01:53,171 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 75 predicate places. [2025-01-10 01:01:53,171 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 97 transitions, 885 flow [2025-01-10 01:01:53,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 35.25) internal successors, (564), 16 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 01:01:53,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:53,173 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:53,180 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 01:01:53,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:53,373 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:53,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1370800641, now seen corresponding path program 1 times [2025-01-10 01:01:53,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:53,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800624447] [2025-01-10 01:01:53,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:53,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:53,379 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 01:01:53,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:01:53,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:53,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:53,533 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 01:01:53,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:53,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800624447] [2025-01-10 01:01:53,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800624447] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:53,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:53,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-10 01:01:53,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791620718] [2025-01-10 01:01:53,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:53,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-10 01:01:53,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:53,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-10 01:01:53,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-01-10 01:01:53,577 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-01-10 01:01:53,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 97 transitions, 885 flow. Second operand has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 01:01:53,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:53,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-01-10 01:01:53,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:53,885 INFO L124 PetriNetUnfolderBase]: 926/2380 cut-off events. [2025-01-10 01:01:53,885 INFO L125 PetriNetUnfolderBase]: For 7104/7248 co-relation queries the response was YES. [2025-01-10 01:01:53,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6826 conditions, 2380 events. 926/2380 cut-off events. For 7104/7248 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18021 event pairs, 370 based on Foata normal form. 1/2308 useless extension candidates. Maximal degree in co-relation 5084. Up to 1578 conditions per place. [2025-01-10 01:01:53,901 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 74 selfloop transitions, 20 changer transitions 11/124 dead transitions. [2025-01-10 01:01:53,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 124 transitions, 1308 flow [2025-01-10 01:01:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:01:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:01:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 250 transitions. [2025-01-10 01:01:53,902 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2025-01-10 01:01:53,902 INFO L175 Difference]: Start difference. First operand has 133 places, 97 transitions, 885 flow. Second operand 6 states and 250 transitions. [2025-01-10 01:01:53,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 124 transitions, 1308 flow [2025-01-10 01:01:53,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 124 transitions, 1234 flow, removed 10 selfloop flow, removed 10 redundant places. [2025-01-10 01:01:53,915 INFO L231 Difference]: Finished difference. Result has 130 places, 110 transitions, 1051 flow [2025-01-10 01:01:53,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1051, PETRI_PLACES=130, PETRI_TRANSITIONS=110} [2025-01-10 01:01:53,916 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 72 predicate places. [2025-01-10 01:01:53,916 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 110 transitions, 1051 flow [2025-01-10 01:01:53,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 01:01:53,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:53,916 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 01:01:53,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-01-10 01:01:53,917 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:53,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1556035998, now seen corresponding path program 1 times [2025-01-10 01:01:53,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:53,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657358553] [2025-01-10 01:01:53,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:53,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:53,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:01:53,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:01:53,930 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:53,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:01:54,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:54,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657358553] [2025-01-10 01:01:54,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657358553] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:54,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978577278] [2025-01-10 01:01:54,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:54,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:54,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:54,050 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 01:01:54,052 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 01:01:54,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:01:54,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:01:54,126 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:54,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:54,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 01:01:54,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:01:54,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:54,320 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 01:01:54,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978577278] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:54,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:01:54,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-01-10 01:01:54,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068096705] [2025-01-10 01:01:54,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:54,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-10 01:01:54,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:54,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-10 01:01:54,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-01-10 01:01:54,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-01-10 01:01:54,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 110 transitions, 1051 flow. Second operand has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 01:01:54,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:54,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-01-10 01:01:54,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:54,616 INFO L124 PetriNetUnfolderBase]: 915/2357 cut-off events. [2025-01-10 01:01:54,616 INFO L125 PetriNetUnfolderBase]: For 8142/8328 co-relation queries the response was YES. [2025-01-10 01:01:54,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 2357 events. 915/2357 cut-off events. For 8142/8328 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18004 event pairs, 623 based on Foata normal form. 2/2306 useless extension candidates. Maximal degree in co-relation 6820. Up to 1527 conditions per place. [2025-01-10 01:01:54,627 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 71 selfloop transitions, 27 changer transitions 11/128 dead transitions. [2025-01-10 01:01:54,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 128 transitions, 1314 flow [2025-01-10 01:01:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:01:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:01:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 324 transitions. [2025-01-10 01:01:54,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.675 [2025-01-10 01:01:54,629 INFO L175 Difference]: Start difference. First operand has 130 places, 110 transitions, 1051 flow. Second operand 8 states and 324 transitions. [2025-01-10 01:01:54,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 128 transitions, 1314 flow [2025-01-10 01:01:54,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 128 transitions, 1287 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-01-10 01:01:54,638 INFO L231 Difference]: Finished difference. Result has 133 places, 106 transitions, 1028 flow [2025-01-10 01:01:54,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1028, PETRI_PLACES=133, PETRI_TRANSITIONS=106} [2025-01-10 01:01:54,640 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 75 predicate places. [2025-01-10 01:01:54,640 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 106 transitions, 1028 flow [2025-01-10 01:01:54,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 01:01:54,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:54,641 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 01:01:54,648 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 01:01:54,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-10 01:01:54,845 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:54,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:54,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1780887804, now seen corresponding path program 1 times [2025-01-10 01:01:54,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:54,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645136654] [2025-01-10 01:01:54,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:54,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:54,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:01:54,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:01:54,855 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:54,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:01:54,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645136654] [2025-01-10 01:01:54,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645136654] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130544518] [2025-01-10 01:01:54,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:54,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:54,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:54,981 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 01:01:54,983 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 01:01:55,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:01:55,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:01:55,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:55,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:55,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-10 01:01:55,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:01:55,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:55,225 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 01:01:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130544518] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:55,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:01:55,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2025-01-10 01:01:55,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634134977] [2025-01-10 01:01:55,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:55,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:01:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:55,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:01:55,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:01:55,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-01-10 01:01:55,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 106 transitions, 1028 flow. Second operand has 8 states, 8 states have (on average 36.0) internal successors, (288), 8 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 01:01:55,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:55,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-01-10 01:01:55,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:55,504 INFO L124 PetriNetUnfolderBase]: 896/2285 cut-off events. [2025-01-10 01:01:55,504 INFO L125 PetriNetUnfolderBase]: For 7588/7750 co-relation queries the response was YES. [2025-01-10 01:01:55,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6693 conditions, 2285 events. 896/2285 cut-off events. For 7588/7750 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17358 event pairs, 612 based on Foata normal form. 2/2208 useless extension candidates. Maximal degree in co-relation 6563. Up to 1429 conditions per place. [2025-01-10 01:01:55,514 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 73 selfloop transitions, 30 changer transitions 11/133 dead transitions. [2025-01-10 01:01:55,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 1325 flow [2025-01-10 01:01:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:01:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:01:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 370 transitions. [2025-01-10 01:01:55,516 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2025-01-10 01:01:55,516 INFO L175 Difference]: Start difference. First operand has 133 places, 106 transitions, 1028 flow. Second operand 9 states and 370 transitions. [2025-01-10 01:01:55,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 1325 flow [2025-01-10 01:01:55,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 133 transitions, 1274 flow, removed 8 selfloop flow, removed 6 redundant places. [2025-01-10 01:01:55,526 INFO L231 Difference]: Finished difference. Result has 135 places, 102 transitions, 991 flow [2025-01-10 01:01:55,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=991, PETRI_PLACES=135, PETRI_TRANSITIONS=102} [2025-01-10 01:01:55,526 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 77 predicate places. [2025-01-10 01:01:55,526 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 102 transitions, 991 flow [2025-01-10 01:01:55,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 36.0) internal successors, (288), 8 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 01:01:55,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:55,527 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 01:01:55,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 01:01:55,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:55,728 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:55,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1628822722, now seen corresponding path program 2 times [2025-01-10 01:01:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348479640] [2025-01-10 01:01:55,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:01:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:55,735 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-10 01:01:55,738 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 19 statements. [2025-01-10 01:01:55,739 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:01:55,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:55,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:55,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348479640] [2025-01-10 01:01:55,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348479640] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:55,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:55,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-10 01:01:55,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761418105] [2025-01-10 01:01:55,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:55,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-10 01:01:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:55,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-10 01:01:55,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-01-10 01:01:55,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-01-10 01:01:55,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 102 transitions, 991 flow. Second operand has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 01:01:55,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:55,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-01-10 01:01:55,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:56,142 INFO L124 PetriNetUnfolderBase]: 860/2198 cut-off events. [2025-01-10 01:01:56,142 INFO L125 PetriNetUnfolderBase]: For 7099/7243 co-relation queries the response was YES. [2025-01-10 01:01:56,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6445 conditions, 2198 events. 860/2198 cut-off events. For 7099/7243 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16470 event pairs, 340 based on Foata normal form. 2/2120 useless extension candidates. Maximal degree in co-relation 6324. Up to 1447 conditions per place. [2025-01-10 01:01:56,151 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 63 selfloop transitions, 17 changer transitions 17/116 dead transitions. [2025-01-10 01:01:56,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 116 transitions, 1218 flow [2025-01-10 01:01:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:01:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:01:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 318 transitions. [2025-01-10 01:01:56,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6625 [2025-01-10 01:01:56,152 INFO L175 Difference]: Start difference. First operand has 135 places, 102 transitions, 991 flow. Second operand 8 states and 318 transitions. [2025-01-10 01:01:56,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 116 transitions, 1218 flow [2025-01-10 01:01:56,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 116 transitions, 1177 flow, removed 1 selfloop flow, removed 6 redundant places. [2025-01-10 01:01:56,162 INFO L231 Difference]: Finished difference. Result has 136 places, 96 transitions, 900 flow [2025-01-10 01:01:56,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=900, PETRI_PLACES=136, PETRI_TRANSITIONS=96} [2025-01-10 01:01:56,162 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2025-01-10 01:01:56,162 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 96 transitions, 900 flow [2025-01-10 01:01:56,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 01:01:56,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:56,163 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:56,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-01-10 01:01:56,163 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:56,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2133796397, now seen corresponding path program 2 times [2025-01-10 01:01:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:56,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709554628] [2025-01-10 01:01:56,163 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:01:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:56,169 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-10 01:01:56,187 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:01:56,187 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:01:56,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:01:56,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:56,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709554628] [2025-01-10 01:01:56,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709554628] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:56,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149961221] [2025-01-10 01:01:56,398 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:01:56,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:56,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:56,400 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 01:01:56,401 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 01:01:56,460 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-10 01:01:56,487 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:01:56,487 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:01:56,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:56,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-10 01:01:56,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:56,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:01:56,511 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 01:01:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:01:56,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-01-10 01:01:56,592 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:01:56,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-10 01:01:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:01:56,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:01:57,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149961221] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:01:57,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:01:57,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-01-10 01:01:57,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875312389] [2025-01-10 01:01:57,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:01:57,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-10 01:01:57,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:57,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-10 01:01:57,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2025-01-10 01:01:57,826 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-01-10 01:01:57,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 96 transitions, 900 flow. Second operand has 17 states, 17 states have (on average 28.470588235294116) internal successors, (484), 17 states have internal predecessors, (484), 0 states have call successors, (0), 0 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 01:01:57,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:57,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-01-10 01:01:57,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:58,291 INFO L124 PetriNetUnfolderBase]: 1732/3559 cut-off events. [2025-01-10 01:01:58,291 INFO L125 PetriNetUnfolderBase]: For 11128/11231 co-relation queries the response was YES. [2025-01-10 01:01:58,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10628 conditions, 3559 events. 1732/3559 cut-off events. For 11128/11231 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25706 event pairs, 215 based on Foata normal form. 26/3579 useless extension candidates. Maximal degree in co-relation 10472. Up to 1511 conditions per place. [2025-01-10 01:01:58,309 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 134 selfloop transitions, 24 changer transitions 0/170 dead transitions. [2025-01-10 01:01:58,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 170 transitions, 1681 flow [2025-01-10 01:01:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:01:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:01:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 292 transitions. [2025-01-10 01:01:58,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2025-01-10 01:01:58,312 INFO L175 Difference]: Start difference. First operand has 136 places, 96 transitions, 900 flow. Second operand 8 states and 292 transitions. [2025-01-10 01:01:58,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 170 transitions, 1681 flow [2025-01-10 01:01:58,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 170 transitions, 1596 flow, removed 8 selfloop flow, removed 8 redundant places. [2025-01-10 01:01:58,325 INFO L231 Difference]: Finished difference. Result has 127 places, 100 transitions, 943 flow [2025-01-10 01:01:58,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=127, PETRI_TRANSITIONS=100} [2025-01-10 01:01:58,325 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 69 predicate places. [2025-01-10 01:01:58,325 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 100 transitions, 943 flow [2025-01-10 01:01:58,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 28.470588235294116) internal successors, (484), 17 states have internal predecessors, (484), 0 states have call successors, (0), 0 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 01:01:58,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:58,326 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 01:01:58,333 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 01:01:58,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:58,530 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:58,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash 207940670, now seen corresponding path program 2 times [2025-01-10 01:01:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:58,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129743843] [2025-01-10 01:01:58,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:01:58,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:58,534 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-10 01:01:58,538 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 19 statements. [2025-01-10 01:01:58,538 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:01:58,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:01:58,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:58,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129743843] [2025-01-10 01:01:58,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129743843] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:58,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:58,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:01:58,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928421416] [2025-01-10 01:01:58,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:58,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:01:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:58,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:01:58,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:01:58,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-01-10 01:01:58,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 100 transitions, 943 flow. Second operand has 6 states, 6 states have (on average 36.666666666666664) internal successors, (220), 6 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 01:01:58,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:58,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-01-10 01:01:58,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:59,069 INFO L124 PetriNetUnfolderBase]: 1112/2794 cut-off events. [2025-01-10 01:01:59,069 INFO L125 PetriNetUnfolderBase]: For 9009/9177 co-relation queries the response was YES. [2025-01-10 01:01:59,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8352 conditions, 2794 events. 1112/2794 cut-off events. For 9009/9177 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 22291 event pairs, 434 based on Foata normal form. 2/2722 useless extension candidates. Maximal degree in co-relation 3426. Up to 1835 conditions per place. [2025-01-10 01:01:59,091 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 58 selfloop transitions, 10 changer transitions 24/114 dead transitions. [2025-01-10 01:01:59,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 114 transitions, 1160 flow [2025-01-10 01:01:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:01:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:01:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 323 transitions. [2025-01-10 01:01:59,092 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6729166666666667 [2025-01-10 01:01:59,092 INFO L175 Difference]: Start difference. First operand has 127 places, 100 transitions, 943 flow. Second operand 8 states and 323 transitions. [2025-01-10 01:01:59,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 114 transitions, 1160 flow [2025-01-10 01:01:59,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 114 transitions, 1112 flow, removed 8 selfloop flow, removed 5 redundant places. [2025-01-10 01:01:59,107 INFO L231 Difference]: Finished difference. Result has 130 places, 87 transitions, 765 flow [2025-01-10 01:01:59,107 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=765, PETRI_PLACES=130, PETRI_TRANSITIONS=87} [2025-01-10 01:01:59,107 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 72 predicate places. [2025-01-10 01:01:59,107 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 87 transitions, 765 flow [2025-01-10 01:01:59,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.666666666666664) internal successors, (220), 6 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 01:01:59,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:59,108 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:01:59,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-01-10 01:01:59,108 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:01:59,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1723178295, now seen corresponding path program 1 times [2025-01-10 01:01:59,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:59,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948944698] [2025-01-10 01:01:59,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:59,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:59,114 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:01:59,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:01:59,119 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:59,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:01:59,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:59,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948944698] [2025-01-10 01:01:59,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948944698] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:01:59,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939697398] [2025-01-10 01:01:59,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:59,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:01:59,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:59,294 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 01:01:59,296 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 01:01:59,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:01:59,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:01:59,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:59,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:59,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 01:01:59,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:01:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:01:59,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:01:59,589 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 01:01:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:01:59,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939697398] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:01:59,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:01:59,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-01-10 01:01:59,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892492914] [2025-01-10 01:01:59,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:01:59,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:01:59,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:59,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:01:59,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:02:00,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2025-01-10 01:02:00,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 87 transitions, 765 flow. Second operand has 20 states, 20 states have (on average 32.8) internal successors, (656), 20 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 01:02:00,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:00,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2025-01-10 01:02:00,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:00,719 INFO L124 PetriNetUnfolderBase]: 1534/3446 cut-off events. [2025-01-10 01:02:00,719 INFO L125 PetriNetUnfolderBase]: For 7689/7881 co-relation queries the response was YES. [2025-01-10 01:02:00,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9768 conditions, 3446 events. 1534/3446 cut-off events. For 7689/7881 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 26663 event pairs, 471 based on Foata normal form. 24/3396 useless extension candidates. Maximal degree in co-relation 9582. Up to 758 conditions per place. [2025-01-10 01:02:00,737 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 120 selfloop transitions, 25 changer transitions 0/164 dead transitions. [2025-01-10 01:02:00,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 164 transitions, 1407 flow [2025-01-10 01:02:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:02:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:02:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 421 transitions. [2025-01-10 01:02:00,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7016666666666667 [2025-01-10 01:02:00,738 INFO L175 Difference]: Start difference. First operand has 130 places, 87 transitions, 765 flow. Second operand 10 states and 421 transitions. [2025-01-10 01:02:00,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 164 transitions, 1407 flow [2025-01-10 01:02:00,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 164 transitions, 1308 flow, removed 8 selfloop flow, removed 11 redundant places. [2025-01-10 01:02:00,748 INFO L231 Difference]: Finished difference. Result has 119 places, 90 transitions, 767 flow [2025-01-10 01:02:00,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=767, PETRI_PLACES=119, PETRI_TRANSITIONS=90} [2025-01-10 01:02:00,748 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 61 predicate places. [2025-01-10 01:02:00,748 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 90 transitions, 767 flow [2025-01-10 01:02:00,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 32.8) internal successors, (656), 20 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 01:02:00,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:00,749 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:00,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 01:02:00,949 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,SelfDestructingSolverStorable22 [2025-01-10 01:02:00,949 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:00,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:00,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1838086445, now seen corresponding path program 1 times [2025-01-10 01:02:00,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:00,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693636581] [2025-01-10 01:02:00,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:00,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:00,955 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-10 01:02:00,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-10 01:02:00,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:00,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:01,053 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 01:02:01,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:01,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693636581] [2025-01-10 01:02:01,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693636581] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:01,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997652178] [2025-01-10 01:02:01,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:01,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:01,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:01,056 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 01:02:01,058 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 01:02:01,114 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-10 01:02:01,134 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-10 01:02:01,134 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:01,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:01,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:02:01,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:01,213 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 01:02:01,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:01,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997652178] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:01,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:01,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2025-01-10 01:02:01,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694015144] [2025-01-10 01:02:01,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:01,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-10 01:02:01,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:01,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-10 01:02:01,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:02:01,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-01-10 01:02:01,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 90 transitions, 767 flow. Second operand has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 01:02:01,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:01,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-01-10 01:02:01,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:01,625 INFO L124 PetriNetUnfolderBase]: 1608/3639 cut-off events. [2025-01-10 01:02:01,625 INFO L125 PetriNetUnfolderBase]: For 9907/10104 co-relation queries the response was YES. [2025-01-10 01:02:01,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10640 conditions, 3639 events. 1608/3639 cut-off events. For 9907/10104 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 28395 event pairs, 557 based on Foata normal form. 95/3688 useless extension candidates. Maximal degree in co-relation 7727. Up to 1727 conditions per place. [2025-01-10 01:02:01,642 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 67 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2025-01-10 01:02:01,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 109 transitions, 1107 flow [2025-01-10 01:02:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:02:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:02:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 264 transitions. [2025-01-10 01:02:01,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2025-01-10 01:02:01,643 INFO L175 Difference]: Start difference. First operand has 119 places, 90 transitions, 767 flow. Second operand 7 states and 264 transitions. [2025-01-10 01:02:01,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 109 transitions, 1107 flow [2025-01-10 01:02:01,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 109 transitions, 1082 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:01,650 INFO L231 Difference]: Finished difference. Result has 123 places, 91 transitions, 824 flow [2025-01-10 01:02:01,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=824, PETRI_PLACES=123, PETRI_TRANSITIONS=91} [2025-01-10 01:02:01,651 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 65 predicate places. [2025-01-10 01:02:01,651 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 91 transitions, 824 flow [2025-01-10 01:02:01,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 01:02:01,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:01,651 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:01,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-10 01:02:01,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:01,855 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:01,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:01,855 INFO L85 PathProgramCache]: Analyzing trace with hash -321515274, now seen corresponding path program 2 times [2025-01-10 01:02:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:01,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752789115] [2025-01-10 01:02:01,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:01,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:01,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-10 01:02:01,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-10 01:02:01,905 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:02:01,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:02:02,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:02,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752789115] [2025-01-10 01:02:02,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752789115] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:02,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354236282] [2025-01-10 01:02:02,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:02,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:02,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:02,097 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 01:02:02,100 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 01:02:02,157 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-10 01:02:02,187 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-10 01:02:02,187 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:02:02,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:02,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:02:02,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:02,197 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 01:02:02,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:02:02,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-10 01:02:02,277 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:02,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-10 01:02:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:02,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:02,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354236282] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:02,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:02,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2025-01-10 01:02:02,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345297052] [2025-01-10 01:02:02,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:02,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 01:02:02,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:02,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 01:02:02,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2025-01-10 01:02:03,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2025-01-10 01:02:03,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 91 transitions, 824 flow. Second operand has 19 states, 19 states have (on average 26.736842105263158) internal successors, (508), 19 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 01:02:03,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:03,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2025-01-10 01:02:03,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:04,767 INFO L124 PetriNetUnfolderBase]: 2631/5641 cut-off events. [2025-01-10 01:02:04,767 INFO L125 PetriNetUnfolderBase]: For 16694/16851 co-relation queries the response was YES. [2025-01-10 01:02:04,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17407 conditions, 5641 events. 2631/5641 cut-off events. For 16694/16851 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 42876 event pairs, 204 based on Foata normal form. 108/5734 useless extension candidates. Maximal degree in co-relation 11557. Up to 1153 conditions per place. [2025-01-10 01:02:04,790 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 167 selfloop transitions, 31 changer transitions 0/213 dead transitions. [2025-01-10 01:02:04,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 213 transitions, 1900 flow [2025-01-10 01:02:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-10 01:02:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-01-10 01:02:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 634 transitions. [2025-01-10 01:02:04,792 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5283333333333333 [2025-01-10 01:02:04,792 INFO L175 Difference]: Start difference. First operand has 123 places, 91 transitions, 824 flow. Second operand 20 states and 634 transitions. [2025-01-10 01:02:04,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 213 transitions, 1900 flow [2025-01-10 01:02:04,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 213 transitions, 1844 flow, removed 9 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:04,814 INFO L231 Difference]: Finished difference. Result has 137 places, 95 transitions, 889 flow [2025-01-10 01:02:04,814 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=889, PETRI_PLACES=137, PETRI_TRANSITIONS=95} [2025-01-10 01:02:04,814 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 79 predicate places. [2025-01-10 01:02:04,814 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 95 transitions, 889 flow [2025-01-10 01:02:04,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 26.736842105263158) internal successors, (508), 19 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 01:02:04,815 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:04,815 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:04,823 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 01:02:05,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:05,016 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:05,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:05,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1377038312, now seen corresponding path program 1 times [2025-01-10 01:02:05,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:05,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734357454] [2025-01-10 01:02:05,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:05,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:05,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-10 01:02:05,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:02:05,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:05,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734357454] [2025-01-10 01:02:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734357454] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181371540] [2025-01-10 01:02:05,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:05,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:05,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:05,199 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 01:02:05,201 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 01:02:05,260 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-10 01:02:05,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:02:05,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:05,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:05,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 01:02:05,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:05,384 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:05,475 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 01:02:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:05,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181371540] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:05,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:05,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-01-10 01:02:05,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074863733] [2025-01-10 01:02:05,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:05,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:02:05,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:05,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:02:05,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:02:06,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:06,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 95 transitions, 889 flow. Second operand has 20 states, 20 states have (on average 32.1) internal successors, (642), 20 states have internal predecessors, (642), 0 states have call successors, (0), 0 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 01:02:06,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:06,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:06,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:06,696 INFO L124 PetriNetUnfolderBase]: 2318/4861 cut-off events. [2025-01-10 01:02:06,696 INFO L125 PetriNetUnfolderBase]: For 16170/16419 co-relation queries the response was YES. [2025-01-10 01:02:06,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15258 conditions, 4861 events. 2318/4861 cut-off events. For 16170/16419 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 37441 event pairs, 603 based on Foata normal form. 46/4826 useless extension candidates. Maximal degree in co-relation 10821. Up to 989 conditions per place. [2025-01-10 01:02:06,723 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 122 selfloop transitions, 25 changer transitions 0/171 dead transitions. [2025-01-10 01:02:06,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 171 transitions, 1590 flow [2025-01-10 01:02:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:02:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:02:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 407 transitions. [2025-01-10 01:02:06,724 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6783333333333333 [2025-01-10 01:02:06,724 INFO L175 Difference]: Start difference. First operand has 137 places, 95 transitions, 889 flow. Second operand 10 states and 407 transitions. [2025-01-10 01:02:06,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 171 transitions, 1590 flow [2025-01-10 01:02:06,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 171 transitions, 1531 flow, removed 5 selfloop flow, removed 13 redundant places. [2025-01-10 01:02:06,739 INFO L231 Difference]: Finished difference. Result has 136 places, 97 transitions, 913 flow [2025-01-10 01:02:06,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=913, PETRI_PLACES=136, PETRI_TRANSITIONS=97} [2025-01-10 01:02:06,740 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2025-01-10 01:02:06,740 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 97 transitions, 913 flow [2025-01-10 01:02:06,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 32.1) internal successors, (642), 20 states have internal predecessors, (642), 0 states have call successors, (0), 0 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 01:02:06,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:06,740 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:06,748 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 01:02:06,944 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,SelfDestructingSolverStorable25 [2025-01-10 01:02:06,944 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:06,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1432896419, now seen corresponding path program 2 times [2025-01-10 01:02:06,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:06,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667893656] [2025-01-10 01:02:06,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:06,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:06,950 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-10 01:02:06,955 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 24 statements. [2025-01-10 01:02:06,955 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:02:06,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-01-10 01:02:07,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667893656] [2025-01-10 01:02:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667893656] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339363847] [2025-01-10 01:02:07,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:07,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:07,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:07,079 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 01:02:07,081 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 01:02:07,143 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-10 01:02:07,172 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 24 statements. [2025-01-10 01:02:07,172 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:02:07,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:07,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-10 01:02:07,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:07,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-01-10 01:02:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-01-10 01:02:07,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-01-10 01:02:07,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339363847] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:07,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:07,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-01-10 01:02:07,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776191882] [2025-01-10 01:02:07,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:07,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-10 01:02:07,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:07,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-10 01:02:07,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2025-01-10 01:02:08,851 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:02:08,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 97 transitions, 913 flow. Second operand has 17 states, 17 states have (on average 30.823529411764707) internal successors, (524), 17 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 01:02:08,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:08,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:02:08,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:09,695 INFO L124 PetriNetUnfolderBase]: 2488/5060 cut-off events. [2025-01-10 01:02:09,695 INFO L125 PetriNetUnfolderBase]: For 20111/20418 co-relation queries the response was YES. [2025-01-10 01:02:09,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16757 conditions, 5060 events. 2488/5060 cut-off events. For 20111/20418 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 38745 event pairs, 726 based on Foata normal form. 52/4965 useless extension candidates. Maximal degree in co-relation 11543. Up to 2343 conditions per place. [2025-01-10 01:02:09,719 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 96 selfloop transitions, 19 changer transitions 0/132 dead transitions. [2025-01-10 01:02:09,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 1525 flow [2025-01-10 01:02:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:02:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:02:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 245 transitions. [2025-01-10 01:02:09,720 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-01-10 01:02:09,720 INFO L175 Difference]: Start difference. First operand has 136 places, 97 transitions, 913 flow. Second operand 7 states and 245 transitions. [2025-01-10 01:02:09,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 1525 flow [2025-01-10 01:02:09,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 132 transitions, 1485 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:09,737 INFO L231 Difference]: Finished difference. Result has 135 places, 96 transitions, 907 flow [2025-01-10 01:02:09,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=907, PETRI_PLACES=135, PETRI_TRANSITIONS=96} [2025-01-10 01:02:09,737 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 77 predicate places. [2025-01-10 01:02:09,738 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 96 transitions, 907 flow [2025-01-10 01:02:09,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 30.823529411764707) internal successors, (524), 17 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 01:02:09,738 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:09,738 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:09,746 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 01:02:09,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-01-10 01:02:09,942 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:09,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:09,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1968859775, now seen corresponding path program 1 times [2025-01-10 01:02:09,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:09,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391765712] [2025-01-10 01:02:09,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:09,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:09,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-10 01:02:09,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-10 01:02:09,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:09,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:10,042 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 01:02:10,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:10,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391765712] [2025-01-10 01:02:10,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391765712] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:10,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336056483] [2025-01-10 01:02:10,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:10,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:10,046 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 01:02:10,048 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 01:02:10,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-10 01:02:10,133 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-10 01:02:10,133 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:10,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:10,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:02:10,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:10,197 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 01:02:10,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:02:10,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336056483] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:10,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:10,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2025-01-10 01:02:10,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31631869] [2025-01-10 01:02:10,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:10,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-10 01:02:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:10,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-10 01:02:10,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:02:10,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-01-10 01:02:10,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 96 transitions, 907 flow. Second operand has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:10,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:10,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-01-10 01:02:10,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:10,644 INFO L124 PetriNetUnfolderBase]: 1777/3948 cut-off events. [2025-01-10 01:02:10,645 INFO L125 PetriNetUnfolderBase]: For 17300/17608 co-relation queries the response was YES. [2025-01-10 01:02:10,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13373 conditions, 3948 events. 1777/3948 cut-off events. For 17300/17608 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 29733 event pairs, 742 based on Foata normal form. 152/3974 useless extension candidates. Maximal degree in co-relation 9078. Up to 2028 conditions per place. [2025-01-10 01:02:10,667 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 70 selfloop transitions, 21 changer transitions 0/116 dead transitions. [2025-01-10 01:02:10,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 116 transitions, 1287 flow [2025-01-10 01:02:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:02:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:02:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 266 transitions. [2025-01-10 01:02:10,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2025-01-10 01:02:10,668 INFO L175 Difference]: Start difference. First operand has 135 places, 96 transitions, 907 flow. Second operand 7 states and 266 transitions. [2025-01-10 01:02:10,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 116 transitions, 1287 flow [2025-01-10 01:02:10,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 116 transitions, 1249 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:10,686 INFO L231 Difference]: Finished difference. Result has 136 places, 96 transitions, 928 flow [2025-01-10 01:02:10,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=928, PETRI_PLACES=136, PETRI_TRANSITIONS=96} [2025-01-10 01:02:10,687 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2025-01-10 01:02:10,687 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 96 transitions, 928 flow [2025-01-10 01:02:10,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:10,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:10,687 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:10,695 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 01:02:10,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-01-10 01:02:10,888 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:10,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1144183310, now seen corresponding path program 2 times [2025-01-10 01:02:10,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:10,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871031350] [2025-01-10 01:02:10,888 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:10,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:10,895 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-01-10 01:02:10,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 10 of 26 statements. [2025-01-10 01:02:10,906 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:02:10,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-01-10 01:02:11,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:11,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871031350] [2025-01-10 01:02:11,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871031350] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:11,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560322705] [2025-01-10 01:02:11,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:11,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:11,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:11,065 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 01:02:11,067 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 01:02:11,132 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-01-10 01:02:11,158 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 10 of 26 statements. [2025-01-10 01:02:11,158 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:02:11,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:11,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-10 01:02:11,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:11,198 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 01:02:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-01-10 01:02:11,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-01-10 01:02:11,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560322705] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:11,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-01-10 01:02:11,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006121309] [2025-01-10 01:02:11,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:11,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-10 01:02:11,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:11,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-10 01:02:11,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2025-01-10 01:02:12,696 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:02:12,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 96 transitions, 928 flow. Second operand has 17 states, 17 states have (on average 31.176470588235293) internal successors, (530), 17 states have internal predecessors, (530), 0 states have call successors, (0), 0 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 01:02:12,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:12,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:02:12,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:13,214 INFO L124 PetriNetUnfolderBase]: 2366/4620 cut-off events. [2025-01-10 01:02:13,214 INFO L125 PetriNetUnfolderBase]: For 17127/17304 co-relation queries the response was YES. [2025-01-10 01:02:13,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15824 conditions, 4620 events. 2366/4620 cut-off events. For 17127/17304 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 32864 event pairs, 621 based on Foata normal form. 41/4612 useless extension candidates. Maximal degree in co-relation 10531. Up to 2554 conditions per place. [2025-01-10 01:02:13,237 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 92 selfloop transitions, 21 changer transitions 0/128 dead transitions. [2025-01-10 01:02:13,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 128 transitions, 1495 flow [2025-01-10 01:02:13,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:02:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:02:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 242 transitions. [2025-01-10 01:02:13,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2025-01-10 01:02:13,238 INFO L175 Difference]: Start difference. First operand has 136 places, 96 transitions, 928 flow. Second operand 7 states and 242 transitions. [2025-01-10 01:02:13,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 128 transitions, 1495 flow [2025-01-10 01:02:13,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 128 transitions, 1398 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-01-10 01:02:13,254 INFO L231 Difference]: Finished difference. Result has 133 places, 95 transitions, 907 flow [2025-01-10 01:02:13,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=907, PETRI_PLACES=133, PETRI_TRANSITIONS=95} [2025-01-10 01:02:13,254 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 75 predicate places. [2025-01-10 01:02:13,254 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 95 transitions, 907 flow [2025-01-10 01:02:13,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 31.176470588235293) internal successors, (530), 17 states have internal predecessors, (530), 0 states have call successors, (0), 0 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 01:02:13,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:13,255 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:13,261 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 01:02:13,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-01-10 01:02:13,455 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:13,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1465209465, now seen corresponding path program 1 times [2025-01-10 01:02:13,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:13,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630239890] [2025-01-10 01:02:13,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:13,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:13,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-10 01:02:13,467 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:02:13,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:13,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:13,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:13,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630239890] [2025-01-10 01:02:13,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630239890] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:13,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146685224] [2025-01-10 01:02:13,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:13,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:13,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:13,633 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 01:02:13,635 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 01:02:13,698 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-10 01:02:13,720 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:02:13,721 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:13,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:13,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:02:13,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:13,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:14,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146685224] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:14,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:14,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2025-01-10 01:02:14,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912949354] [2025-01-10 01:02:14,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:14,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 01:02:14,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:14,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 01:02:14,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2025-01-10 01:02:14,457 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-01-10 01:02:14,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 95 transitions, 907 flow. Second operand has 24 states, 24 states have (on average 36.458333333333336) internal successors, (875), 24 states have internal predecessors, (875), 0 states have call successors, (0), 0 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 01:02:14,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:14,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-01-10 01:02:14,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:15,139 INFO L124 PetriNetUnfolderBase]: 1524/3646 cut-off events. [2025-01-10 01:02:15,139 INFO L125 PetriNetUnfolderBase]: For 14276/14455 co-relation queries the response was YES. [2025-01-10 01:02:15,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12288 conditions, 3646 events. 1524/3646 cut-off events. For 14276/14455 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 29338 event pairs, 717 based on Foata normal form. 2/3506 useless extension candidates. Maximal degree in co-relation 8571. Up to 1872 conditions per place. [2025-01-10 01:02:15,160 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 108 selfloop transitions, 35 changer transitions 2/173 dead transitions. [2025-01-10 01:02:15,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 173 transitions, 1503 flow [2025-01-10 01:02:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-10 01:02:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-01-10 01:02:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 911 transitions. [2025-01-10 01:02:15,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6601449275362319 [2025-01-10 01:02:15,162 INFO L175 Difference]: Start difference. First operand has 133 places, 95 transitions, 907 flow. Second operand 23 states and 911 transitions. [2025-01-10 01:02:15,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 173 transitions, 1503 flow [2025-01-10 01:02:15,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 173 transitions, 1455 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:15,172 INFO L231 Difference]: Finished difference. Result has 152 places, 103 transitions, 997 flow [2025-01-10 01:02:15,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=997, PETRI_PLACES=152, PETRI_TRANSITIONS=103} [2025-01-10 01:02:15,173 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 94 predicate places. [2025-01-10 01:02:15,173 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 103 transitions, 997 flow [2025-01-10 01:02:15,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 36.458333333333336) internal successors, (875), 24 states have internal predecessors, (875), 0 states have call successors, (0), 0 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 01:02:15,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:15,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:15,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-01-10 01:02:15,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:15,376 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:15,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:15,376 INFO L85 PathProgramCache]: Analyzing trace with hash 962979973, now seen corresponding path program 1 times [2025-01-10 01:02:15,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:15,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889595011] [2025-01-10 01:02:15,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:15,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:15,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-10 01:02:15,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:15,391 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:15,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:15,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889595011] [2025-01-10 01:02:15,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889595011] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860809661] [2025-01-10 01:02:15,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:15,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:15,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:15,667 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 01:02:15,669 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 01:02:15,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-10 01:02:15,757 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:15,757 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:15,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:15,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:02:15,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:15,844 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-01-10 01:02:15,844 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 26 treesize of output 10 [2025-01-10 01:02:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:15,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:15,986 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-01-10 01:02:15,986 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 32 treesize of output 48 [2025-01-10 01:02:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:16,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860809661] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:16,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:16,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2025-01-10 01:02:16,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512029992] [2025-01-10 01:02:16,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:16,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-10 01:02:16,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:16,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-10 01:02:16,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2025-01-10 01:02:16,945 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:16,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 103 transitions, 997 flow. Second operand has 23 states, 23 states have (on average 32.21739130434783) internal successors, (741), 23 states have internal predecessors, (741), 0 states have call successors, (0), 0 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 01:02:16,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:16,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:16,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:17,696 INFO L124 PetriNetUnfolderBase]: 2686/5504 cut-off events. [2025-01-10 01:02:17,696 INFO L125 PetriNetUnfolderBase]: For 18628/18664 co-relation queries the response was YES. [2025-01-10 01:02:17,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19595 conditions, 5504 events. 2686/5504 cut-off events. For 18628/18664 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 40593 event pairs, 268 based on Foata normal form. 83/5565 useless extension candidates. Maximal degree in co-relation 16619. Up to 2227 conditions per place. [2025-01-10 01:02:17,727 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 189 selfloop transitions, 29 changer transitions 6/237 dead transitions. [2025-01-10 01:02:17,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 237 transitions, 2599 flow [2025-01-10 01:02:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 01:02:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-10 01:02:17,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 467 transitions. [2025-01-10 01:02:17,729 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486111111111111 [2025-01-10 01:02:17,729 INFO L175 Difference]: Start difference. First operand has 152 places, 103 transitions, 997 flow. Second operand 12 states and 467 transitions. [2025-01-10 01:02:17,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 237 transitions, 2599 flow [2025-01-10 01:02:17,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 237 transitions, 2534 flow, removed 4 selfloop flow, removed 15 redundant places. [2025-01-10 01:02:17,750 INFO L231 Difference]: Finished difference. Result has 153 places, 110 transitions, 1126 flow [2025-01-10 01:02:17,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1126, PETRI_PLACES=153, PETRI_TRANSITIONS=110} [2025-01-10 01:02:17,750 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 95 predicate places. [2025-01-10 01:02:17,750 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 110 transitions, 1126 flow [2025-01-10 01:02:17,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 32.21739130434783) internal successors, (741), 23 states have internal predecessors, (741), 0 states have call successors, (0), 0 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 01:02:17,751 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:17,751 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:17,757 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 01:02:17,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:17,951 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:17,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1887141263, now seen corresponding path program 2 times [2025-01-10 01:02:17,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:17,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304941679] [2025-01-10 01:02:17,952 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:17,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:17,958 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:02:17,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 26 of 30 statements. [2025-01-10 01:02:17,966 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:02:17,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:18,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304941679] [2025-01-10 01:02:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304941679] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:18,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:18,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-01-10 01:02:18,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842979] [2025-01-10 01:02:18,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:18,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:02:18,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:18,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:02:18,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:02:18,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:18,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 110 transitions, 1126 flow. Second operand has 13 states, 13 states have (on average 31.923076923076923) internal successors, (415), 13 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 01:02:18,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:18,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:18,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:19,220 INFO L124 PetriNetUnfolderBase]: 3236/6541 cut-off events. [2025-01-10 01:02:19,220 INFO L125 PetriNetUnfolderBase]: For 28198/28242 co-relation queries the response was YES. [2025-01-10 01:02:19,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25331 conditions, 6541 events. 3236/6541 cut-off events. For 28198/28242 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 49257 event pairs, 1630 based on Foata normal form. 68/6573 useless extension candidates. Maximal degree in co-relation 21710. Up to 2803 conditions per place. [2025-01-10 01:02:19,249 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 157 selfloop transitions, 51 changer transitions 0/221 dead transitions. [2025-01-10 01:02:19,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 221 transitions, 2481 flow [2025-01-10 01:02:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:02:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:02:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 426 transitions. [2025-01-10 01:02:19,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2025-01-10 01:02:19,250 INFO L175 Difference]: Start difference. First operand has 153 places, 110 transitions, 1126 flow. Second operand 11 states and 426 transitions. [2025-01-10 01:02:19,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 221 transitions, 2481 flow [2025-01-10 01:02:19,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 221 transitions, 2334 flow, removed 28 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:19,276 INFO L231 Difference]: Finished difference. Result has 163 places, 139 transitions, 1609 flow [2025-01-10 01:02:19,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1609, PETRI_PLACES=163, PETRI_TRANSITIONS=139} [2025-01-10 01:02:19,276 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 105 predicate places. [2025-01-10 01:02:19,276 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 139 transitions, 1609 flow [2025-01-10 01:02:19,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.923076923076923) internal successors, (415), 13 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 01:02:19,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:19,277 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:19,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-01-10 01:02:19,277 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:19,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash -777233229, now seen corresponding path program 3 times [2025-01-10 01:02:19,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:19,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717716113] [2025-01-10 01:02:19,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:02:19,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:19,288 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 3 equivalence classes. [2025-01-10 01:02:19,293 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-01-10 01:02:19,293 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-01-10 01:02:19,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:19,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717716113] [2025-01-10 01:02:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717716113] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:19,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:19,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-10 01:02:19,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793745823] [2025-01-10 01:02:19,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:19,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:02:19,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:19,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:02:19,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:02:19,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:19,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 139 transitions, 1609 flow. Second operand has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:19,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:19,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:19,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:20,502 INFO L124 PetriNetUnfolderBase]: 3865/7699 cut-off events. [2025-01-10 01:02:20,502 INFO L125 PetriNetUnfolderBase]: For 35608/35648 co-relation queries the response was YES. [2025-01-10 01:02:20,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31613 conditions, 7699 events. 3865/7699 cut-off events. For 35608/35648 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 59486 event pairs, 1655 based on Foata normal form. 87/7732 useless extension candidates. Maximal degree in co-relation 27038. Up to 2915 conditions per place. [2025-01-10 01:02:20,548 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 220 selfloop transitions, 68 changer transitions 7/308 dead transitions. [2025-01-10 01:02:20,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 308 transitions, 4122 flow [2025-01-10 01:02:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:02:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:02:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 383 transitions. [2025-01-10 01:02:20,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7092592592592593 [2025-01-10 01:02:20,549 INFO L175 Difference]: Start difference. First operand has 163 places, 139 transitions, 1609 flow. Second operand 9 states and 383 transitions. [2025-01-10 01:02:20,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 308 transitions, 4122 flow [2025-01-10 01:02:20,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 308 transitions, 3902 flow, removed 63 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:20,607 INFO L231 Difference]: Finished difference. Result has 172 places, 168 transitions, 2262 flow [2025-01-10 01:02:20,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2262, PETRI_PLACES=172, PETRI_TRANSITIONS=168} [2025-01-10 01:02:20,608 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 114 predicate places. [2025-01-10 01:02:20,608 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 168 transitions, 2262 flow [2025-01-10 01:02:20,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:20,608 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:20,608 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:20,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-01-10 01:02:20,608 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:20,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:20,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1843470677, now seen corresponding path program 1 times [2025-01-10 01:02:20,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:20,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648615193] [2025-01-10 01:02:20,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:20,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:20,616 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-10 01:02:20,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:20,632 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:20,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:20,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:20,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648615193] [2025-01-10 01:02:20,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648615193] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:20,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:20,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-01-10 01:02:20,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804300402] [2025-01-10 01:02:20,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:20,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:02:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:20,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:02:20,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:02:21,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:21,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 168 transitions, 2262 flow. Second operand has 13 states, 13 states have (on average 31.923076923076923) internal successors, (415), 13 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 01:02:21,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:21,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:21,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:22,271 INFO L124 PetriNetUnfolderBase]: 4011/8064 cut-off events. [2025-01-10 01:02:22,272 INFO L125 PetriNetUnfolderBase]: For 42464/42508 co-relation queries the response was YES. [2025-01-10 01:02:22,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34401 conditions, 8064 events. 4011/8064 cut-off events. For 42464/42508 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 63832 event pairs, 1773 based on Foata normal form. 76/8087 useless extension candidates. Maximal degree in co-relation 29411. Up to 3665 conditions per place. [2025-01-10 01:02:22,320 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 236 selfloop transitions, 66 changer transitions 0/315 dead transitions. [2025-01-10 01:02:22,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 315 transitions, 4429 flow [2025-01-10 01:02:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:02:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:02:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 427 transitions. [2025-01-10 01:02:22,321 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.646969696969697 [2025-01-10 01:02:22,322 INFO L175 Difference]: Start difference. First operand has 172 places, 168 transitions, 2262 flow. Second operand 11 states and 427 transitions. [2025-01-10 01:02:22,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 315 transitions, 4429 flow [2025-01-10 01:02:22,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 315 transitions, 4297 flow, removed 18 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:22,397 INFO L231 Difference]: Finished difference. Result has 182 places, 176 transitions, 2428 flow [2025-01-10 01:02:22,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2428, PETRI_PLACES=182, PETRI_TRANSITIONS=176} [2025-01-10 01:02:22,397 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 124 predicate places. [2025-01-10 01:02:22,397 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 176 transitions, 2428 flow [2025-01-10 01:02:22,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.923076923076923) internal successors, (415), 13 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 01:02:22,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:22,398 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:22,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-01-10 01:02:22,398 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:22,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:22,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2080423215, now seen corresponding path program 4 times [2025-01-10 01:02:22,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:22,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355248157] [2025-01-10 01:02:22,398 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:02:22,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:22,404 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:02:22,409 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-01-10 01:02:22,409 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:02:22,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:22,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:22,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355248157] [2025-01-10 01:02:22,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355248157] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:22,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549453840] [2025-01-10 01:02:22,490 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:02:22,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:22,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:22,495 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 01:02:22,496 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 01:02:22,557 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:02:22,573 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-01-10 01:02:22,574 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:02:22,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:22,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:02:22,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:22,672 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-01-10 01:02:22,673 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 26 treesize of output 10 [2025-01-10 01:02:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:22,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:22,752 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-01-10 01:02:22,752 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 40 treesize of output 56 [2025-01-10 01:02:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549453840] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:22,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-01-10 01:02:22,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667300282] [2025-01-10 01:02:22,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:22,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:02:22,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:22,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:02:22,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:02:23,384 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:23,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 176 transitions, 2428 flow. Second operand has 16 states, 16 states have (on average 32.25) internal successors, (516), 16 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 01:02:23,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:23,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:23,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:24,876 INFO L124 PetriNetUnfolderBase]: 4733/9494 cut-off events. [2025-01-10 01:02:24,877 INFO L125 PetriNetUnfolderBase]: For 53023/53065 co-relation queries the response was YES. [2025-01-10 01:02:24,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41128 conditions, 9494 events. 4733/9494 cut-off events. For 53023/53065 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 76996 event pairs, 2125 based on Foata normal form. 89/9522 useless extension candidates. Maximal degree in co-relation 35070. Up to 3781 conditions per place. [2025-01-10 01:02:24,975 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 192 selfloop transitions, 104 changer transitions 5/314 dead transitions. [2025-01-10 01:02:24,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 314 transitions, 4502 flow [2025-01-10 01:02:24,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:02:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:02:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 417 transitions. [2025-01-10 01:02:24,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.695 [2025-01-10 01:02:24,976 INFO L175 Difference]: Start difference. First operand has 182 places, 176 transitions, 2428 flow. Second operand 10 states and 417 transitions. [2025-01-10 01:02:24,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 314 transitions, 4502 flow [2025-01-10 01:02:25,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 314 transitions, 4332 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:25,097 INFO L231 Difference]: Finished difference. Result has 191 places, 211 transitions, 3306 flow [2025-01-10 01:02:25,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2306, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3306, PETRI_PLACES=191, PETRI_TRANSITIONS=211} [2025-01-10 01:02:25,098 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 133 predicate places. [2025-01-10 01:02:25,098 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 211 transitions, 3306 flow [2025-01-10 01:02:25,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 32.25) internal successors, (516), 16 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 01:02:25,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:25,098 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:25,104 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 01:02:25,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:25,299 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:25,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:25,299 INFO L85 PathProgramCache]: Analyzing trace with hash -295378107, now seen corresponding path program 2 times [2025-01-10 01:02:25,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:25,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273794913] [2025-01-10 01:02:25,299 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:25,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:25,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:02:25,311 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:25,311 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:02:25,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:02:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273794913] [2025-01-10 01:02:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273794913] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344757915] [2025-01-10 01:02:25,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:25,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:25,772 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 01:02:25,773 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 01:02:25,833 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:02:25,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:25,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:02:25,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:25,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-01-10 01:02:25,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:26,055 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-01-10 01:02:26,055 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 26 treesize of output 10 [2025-01-10 01:02:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:26,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:26,229 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-01-10 01:02:26,230 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 32 treesize of output 48 [2025-01-10 01:02:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:26,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344757915] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:26,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:26,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 28 [2025-01-10 01:02:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442142527] [2025-01-10 01:02:26,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:26,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-10 01:02:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:26,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-10 01:02:26,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2025-01-10 01:02:28,589 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:28,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 211 transitions, 3306 flow. Second operand has 28 states, 28 states have (on average 32.17857142857143) internal successors, (901), 28 states have internal predecessors, (901), 0 states have call successors, (0), 0 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 01:02:28,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:28,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:28,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:30,073 INFO L124 PetriNetUnfolderBase]: 4903/9750 cut-off events. [2025-01-10 01:02:30,073 INFO L125 PetriNetUnfolderBase]: For 65459/65497 co-relation queries the response was YES. [2025-01-10 01:02:30,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44568 conditions, 9750 events. 4903/9750 cut-off events. For 65459/65497 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 78958 event pairs, 2539 based on Foata normal form. 78/9756 useless extension candidates. Maximal degree in co-relation 38173. Up to 4702 conditions per place. [2025-01-10 01:02:30,147 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 193 selfloop transitions, 108 changer transitions 5/319 dead transitions. [2025-01-10 01:02:30,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 319 transitions, 5204 flow [2025-01-10 01:02:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 01:02:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-10 01:02:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 458 transitions. [2025-01-10 01:02:30,148 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6361111111111111 [2025-01-10 01:02:30,148 INFO L175 Difference]: Start difference. First operand has 191 places, 211 transitions, 3306 flow. Second operand 12 states and 458 transitions. [2025-01-10 01:02:30,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 319 transitions, 5204 flow [2025-01-10 01:02:30,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 319 transitions, 5007 flow, removed 41 selfloop flow, removed 3 redundant places. [2025-01-10 01:02:30,336 INFO L231 Difference]: Finished difference. Result has 204 places, 234 transitions, 3873 flow [2025-01-10 01:02:30,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3873, PETRI_PLACES=204, PETRI_TRANSITIONS=234} [2025-01-10 01:02:30,337 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 146 predicate places. [2025-01-10 01:02:30,337 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 234 transitions, 3873 flow [2025-01-10 01:02:30,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 32.17857142857143) internal successors, (901), 28 states have internal predecessors, (901), 0 states have call successors, (0), 0 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 01:02:30,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:30,338 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:30,343 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 01:02:30,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-01-10 01:02:30,538 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:30,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash -531120267, now seen corresponding path program 3 times [2025-01-10 01:02:30,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:30,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105729899] [2025-01-10 01:02:30,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:02:30,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:30,544 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 3 equivalence classes. [2025-01-10 01:02:30,548 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-01-10 01:02:30,548 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-01-10 01:02:30,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:30,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:30,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105729899] [2025-01-10 01:02:30,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105729899] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:30,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:30,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-10 01:02:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374162339] [2025-01-10 01:02:30,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:30,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:02:30,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:30,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:02:30,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:02:30,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:30,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 234 transitions, 3873 flow. Second operand has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:30,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:30,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:30,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:32,217 INFO L124 PetriNetUnfolderBase]: 5314/10711 cut-off events. [2025-01-10 01:02:32,218 INFO L125 PetriNetUnfolderBase]: For 70845/70889 co-relation queries the response was YES. [2025-01-10 01:02:32,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49490 conditions, 10711 events. 5314/10711 cut-off events. For 70845/70889 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 89679 event pairs, 2335 based on Foata normal form. 84/10729 useless extension candidates. Maximal degree in co-relation 48233. Up to 4782 conditions per place. [2025-01-10 01:02:32,305 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 207 selfloop transitions, 120 changer transitions 5/345 dead transitions. [2025-01-10 01:02:32,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 345 transitions, 5576 flow [2025-01-10 01:02:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:02:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:02:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 414 transitions. [2025-01-10 01:02:32,306 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.69 [2025-01-10 01:02:32,306 INFO L175 Difference]: Start difference. First operand has 204 places, 234 transitions, 3873 flow. Second operand 10 states and 414 transitions. [2025-01-10 01:02:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 345 transitions, 5576 flow [2025-01-10 01:02:32,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 345 transitions, 5423 flow, removed 17 selfloop flow, removed 5 redundant places. [2025-01-10 01:02:32,479 INFO L231 Difference]: Finished difference. Result has 211 places, 240 transitions, 4112 flow [2025-01-10 01:02:32,480 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4112, PETRI_PLACES=211, PETRI_TRANSITIONS=240} [2025-01-10 01:02:32,480 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 153 predicate places. [2025-01-10 01:02:32,480 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 240 transitions, 4112 flow [2025-01-10 01:02:32,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:32,480 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:32,480 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:32,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2025-01-10 01:02:32,481 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:32,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash 823788943, now seen corresponding path program 4 times [2025-01-10 01:02:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418880027] [2025-01-10 01:02:32,481 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:02:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:32,486 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:02:32,489 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-01-10 01:02:32,490 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:02:32,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:32,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:32,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418880027] [2025-01-10 01:02:32,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418880027] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:32,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:32,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-01-10 01:02:32,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18682223] [2025-01-10 01:02:32,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:32,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 01:02:32,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:32,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 01:02:32,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:02:32,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:32,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 240 transitions, 4112 flow. Second operand has 10 states, 10 states have (on average 32.6) internal successors, (326), 10 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 01:02:32,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:32,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:32,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:34,362 INFO L124 PetriNetUnfolderBase]: 5566/11174 cut-off events. [2025-01-10 01:02:34,363 INFO L125 PetriNetUnfolderBase]: For 81035/81083 co-relation queries the response was YES. [2025-01-10 01:02:34,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52285 conditions, 11174 events. 5566/11174 cut-off events. For 81035/81083 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 94182 event pairs, 2574 based on Foata normal form. 80/11186 useless extension candidates. Maximal degree in co-relation 51097. Up to 4768 conditions per place. [2025-01-10 01:02:34,441 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 246 selfloop transitions, 106 changer transitions 2/367 dead transitions. [2025-01-10 01:02:34,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 367 transitions, 6267 flow [2025-01-10 01:02:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:02:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:02:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 369 transitions. [2025-01-10 01:02:34,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2025-01-10 01:02:34,442 INFO L175 Difference]: Start difference. First operand has 211 places, 240 transitions, 4112 flow. Second operand 9 states and 369 transitions. [2025-01-10 01:02:34,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 367 transitions, 6267 flow [2025-01-10 01:02:34,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 367 transitions, 5961 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:34,638 INFO L231 Difference]: Finished difference. Result has 216 places, 248 transitions, 4279 flow [2025-01-10 01:02:34,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3868, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4279, PETRI_PLACES=216, PETRI_TRANSITIONS=248} [2025-01-10 01:02:34,638 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 158 predicate places. [2025-01-10 01:02:34,638 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 248 transitions, 4279 flow [2025-01-10 01:02:34,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.6) internal successors, (326), 10 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 01:02:34,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:34,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:34,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2025-01-10 01:02:34,639 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:34,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2079866159, now seen corresponding path program 5 times [2025-01-10 01:02:34,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:34,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237134654] [2025-01-10 01:02:34,639 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:02:34,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:34,646 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-01-10 01:02:34,658 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:34,659 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:02:34,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:02:34,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:34,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237134654] [2025-01-10 01:02:34,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237134654] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:34,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200982389] [2025-01-10 01:02:34,966 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:02:34,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:34,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:34,968 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 01:02:34,969 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 01:02:35,024 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-01-10 01:02:35,045 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:35,045 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:02:35,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:35,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-10 01:02:35,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:35,166 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-01-10 01:02:35,167 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 26 treesize of output 10 [2025-01-10 01:02:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:35,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:35,332 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-01-10 01:02:35,332 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 32 treesize of output 48 [2025-01-10 01:02:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:35,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200982389] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:35,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:35,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 10] total 26 [2025-01-10 01:02:35,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823264693] [2025-01-10 01:02:35,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:35,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:02:35,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:35,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:02:35,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-01-10 01:02:36,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:36,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 248 transitions, 4279 flow. Second operand has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:36,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:36,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:36,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:39,014 INFO L124 PetriNetUnfolderBase]: 6028/12205 cut-off events. [2025-01-10 01:02:39,014 INFO L125 PetriNetUnfolderBase]: For 92998/93050 co-relation queries the response was YES. [2025-01-10 01:02:39,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57627 conditions, 12205 events. 6028/12205 cut-off events. For 92998/93050 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 105414 event pairs, 2605 based on Foata normal form. 103/12226 useless extension candidates. Maximal degree in co-relation 56332. Up to 4707 conditions per place. [2025-01-10 01:02:39,148 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 237 selfloop transitions, 108 changer transitions 9/367 dead transitions. [2025-01-10 01:02:39,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 367 transitions, 6286 flow [2025-01-10 01:02:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:02:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:02:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 383 transitions. [2025-01-10 01:02:39,149 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7092592592592593 [2025-01-10 01:02:39,149 INFO L175 Difference]: Start difference. First operand has 216 places, 248 transitions, 4279 flow. Second operand 9 states and 383 transitions. [2025-01-10 01:02:39,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 367 transitions, 6286 flow [2025-01-10 01:02:39,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 367 transitions, 6086 flow, removed 12 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:39,443 INFO L231 Difference]: Finished difference. Result has 224 places, 256 transitions, 4560 flow [2025-01-10 01:02:39,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4560, PETRI_PLACES=224, PETRI_TRANSITIONS=256} [2025-01-10 01:02:39,444 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 166 predicate places. [2025-01-10 01:02:39,444 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 256 transitions, 4560 flow [2025-01-10 01:02:39,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:39,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:39,444 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:39,451 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 01:02:39,645 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,SelfDestructingSolverStorable38 [2025-01-10 01:02:39,645 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:39,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:39,646 INFO L85 PathProgramCache]: Analyzing trace with hash -122159831, now seen corresponding path program 5 times [2025-01-10 01:02:39,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:39,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731314033] [2025-01-10 01:02:39,646 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:02:39,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:39,651 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-01-10 01:02:39,662 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:39,662 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:02:39,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:02:40,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:40,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731314033] [2025-01-10 01:02:40,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731314033] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:40,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457934272] [2025-01-10 01:02:40,082 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:02:40,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:40,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:40,085 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 01:02:40,087 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 01:02:40,173 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-01-10 01:02:40,199 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:40,199 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:02:40,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:40,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-10 01:02:40,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:40,378 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-01-10 01:02:40,378 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 27 treesize of output 20 [2025-01-10 01:02:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:40,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:40,571 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-01-10 01:02:40,571 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 32 treesize of output 48 [2025-01-10 01:02:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:40,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457934272] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:40,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:40,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 10] total 27 [2025-01-10 01:02:40,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047887956] [2025-01-10 01:02:40,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:40,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:02:40,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:40,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:02:40,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2025-01-10 01:02:41,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:41,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 256 transitions, 4560 flow. Second operand has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:41,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:41,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:41,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:43,453 INFO L124 PetriNetUnfolderBase]: 5950/11991 cut-off events. [2025-01-10 01:02:43,453 INFO L125 PetriNetUnfolderBase]: For 101565/101613 co-relation queries the response was YES. [2025-01-10 01:02:43,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57775 conditions, 11991 events. 5950/11991 cut-off events. For 101565/101613 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 103214 event pairs, 2555 based on Foata normal form. 76/12003 useless extension candidates. Maximal degree in co-relation 56500. Up to 5463 conditions per place. [2025-01-10 01:02:43,572 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 277 selfloop transitions, 117 changer transitions 0/407 dead transitions. [2025-01-10 01:02:43,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 407 transitions, 7043 flow [2025-01-10 01:02:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 01:02:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-10 01:02:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 477 transitions. [2025-01-10 01:02:43,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6625 [2025-01-10 01:02:43,573 INFO L175 Difference]: Start difference. First operand has 224 places, 256 transitions, 4560 flow. Second operand 12 states and 477 transitions. [2025-01-10 01:02:43,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 407 transitions, 7043 flow [2025-01-10 01:02:43,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 407 transitions, 6819 flow, removed 44 selfloop flow, removed 3 redundant places. [2025-01-10 01:02:43,896 INFO L231 Difference]: Finished difference. Result has 236 places, 262 transitions, 4710 flow [2025-01-10 01:02:43,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4710, PETRI_PLACES=236, PETRI_TRANSITIONS=262} [2025-01-10 01:02:43,897 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 178 predicate places. [2025-01-10 01:02:43,897 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 262 transitions, 4710 flow [2025-01-10 01:02:43,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:43,898 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:43,898 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:43,905 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 01:02:44,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-01-10 01:02:44,098 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:44,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:44,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1845397875, now seen corresponding path program 6 times [2025-01-10 01:02:44,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:44,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535387843] [2025-01-10 01:02:44,099 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:02:44,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:44,106 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 3 equivalence classes. [2025-01-10 01:02:44,111 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-01-10 01:02:44,111 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-01-10 01:02:44,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:44,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:44,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535387843] [2025-01-10 01:02:44,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535387843] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:44,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:44,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-10 01:02:44,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496200865] [2025-01-10 01:02:44,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:44,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:02:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:44,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:02:44,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:02:44,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:44,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 262 transitions, 4710 flow. Second operand has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:44,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:44,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:44,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:46,615 INFO L124 PetriNetUnfolderBase]: 6041/12164 cut-off events. [2025-01-10 01:02:46,615 INFO L125 PetriNetUnfolderBase]: For 97941/97989 co-relation queries the response was YES. [2025-01-10 01:02:46,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58757 conditions, 12164 events. 6041/12164 cut-off events. For 97941/97989 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 104533 event pairs, 2785 based on Foata normal form. 95/12184 useless extension candidates. Maximal degree in co-relation 57454. Up to 5315 conditions per place. [2025-01-10 01:02:46,743 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 252 selfloop transitions, 104 changer transitions 3/372 dead transitions. [2025-01-10 01:02:46,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 372 transitions, 6663 flow [2025-01-10 01:02:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:02:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:02:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 370 transitions. [2025-01-10 01:02:46,744 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2025-01-10 01:02:46,744 INFO L175 Difference]: Start difference. First operand has 236 places, 262 transitions, 4710 flow. Second operand 9 states and 370 transitions. [2025-01-10 01:02:46,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 372 transitions, 6663 flow [2025-01-10 01:02:47,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 372 transitions, 6460 flow, removed 20 selfloop flow, removed 7 redundant places. [2025-01-10 01:02:47,068 INFO L231 Difference]: Finished difference. Result has 239 places, 264 transitions, 4751 flow [2025-01-10 01:02:47,068 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4751, PETRI_PLACES=239, PETRI_TRANSITIONS=264} [2025-01-10 01:02:47,069 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 181 predicate places. [2025-01-10 01:02:47,069 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 264 transitions, 4751 flow [2025-01-10 01:02:47,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:47,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:47,069 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:47,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2025-01-10 01:02:47,069 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:47,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1269228723, now seen corresponding path program 7 times [2025-01-10 01:02:47,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:47,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706416062] [2025-01-10 01:02:47,070 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:02:47,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:47,078 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-10 01:02:47,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:02:47,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:47,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:02:47,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:47,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706416062] [2025-01-10 01:02:47,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706416062] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:47,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:47,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-01-10 01:02:47,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697245483] [2025-01-10 01:02:47,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:47,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 01:02:47,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:47,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 01:02:47,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-01-10 01:02:47,811 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:47,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 264 transitions, 4751 flow. Second operand has 12 states, 12 states have (on average 32.083333333333336) internal successors, (385), 12 states have internal predecessors, (385), 0 states have call successors, (0), 0 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 01:02:47,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:47,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:47,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:49,766 INFO L124 PetriNetUnfolderBase]: 6005/12182 cut-off events. [2025-01-10 01:02:49,766 INFO L125 PetriNetUnfolderBase]: For 101705/101757 co-relation queries the response was YES. [2025-01-10 01:02:49,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59506 conditions, 12182 events. 6005/12182 cut-off events. For 101705/101757 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 105571 event pairs, 2917 based on Foata normal form. 76/12185 useless extension candidates. Maximal degree in co-relation 58177. Up to 5481 conditions per place. [2025-01-10 01:02:49,905 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 233 selfloop transitions, 102 changer transitions 0/348 dead transitions. [2025-01-10 01:02:49,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 348 transitions, 6399 flow [2025-01-10 01:02:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:02:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:02:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 415 transitions. [2025-01-10 01:02:49,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2025-01-10 01:02:49,907 INFO L175 Difference]: Start difference. First operand has 239 places, 264 transitions, 4751 flow. Second operand 11 states and 415 transitions. [2025-01-10 01:02:49,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 348 transitions, 6399 flow [2025-01-10 01:02:50,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 348 transitions, 6176 flow, removed 24 selfloop flow, removed 5 redundant places. [2025-01-10 01:02:50,261 INFO L231 Difference]: Finished difference. Result has 245 places, 263 transitions, 4672 flow [2025-01-10 01:02:50,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4672, PETRI_PLACES=245, PETRI_TRANSITIONS=263} [2025-01-10 01:02:50,262 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 187 predicate places. [2025-01-10 01:02:50,262 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 263 transitions, 4672 flow [2025-01-10 01:02:50,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.083333333333336) internal successors, (385), 12 states have internal predecessors, (385), 0 states have call successors, (0), 0 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 01:02:50,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:50,262 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:50,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2025-01-10 01:02:50,262 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:50,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812725, now seen corresponding path program 8 times [2025-01-10 01:02:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:50,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247230793] [2025-01-10 01:02:50,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:50,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:50,270 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-10 01:02:50,273 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-01-10 01:02:50,273 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:02:50,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:50,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247230793] [2025-01-10 01:02:50,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247230793] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:50,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:50,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-10 01:02:50,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625326289] [2025-01-10 01:02:50,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:50,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:02:50,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:50,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:02:50,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:02:50,650 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:50,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 263 transitions, 4672 flow. Second operand has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:50,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:50,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:50,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:52,561 INFO L124 PetriNetUnfolderBase]: 5822/11791 cut-off events. [2025-01-10 01:02:52,561 INFO L125 PetriNetUnfolderBase]: For 96574/96626 co-relation queries the response was YES. [2025-01-10 01:02:52,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57677 conditions, 11791 events. 5822/11791 cut-off events. For 96574/96626 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 101382 event pairs, 2720 based on Foata normal form. 99/11824 useless extension candidates. Maximal degree in co-relation 56347. Up to 5096 conditions per place. [2025-01-10 01:02:52,748 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 244 selfloop transitions, 97 changer transitions 2/356 dead transitions. [2025-01-10 01:02:52,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 356 transitions, 6455 flow [2025-01-10 01:02:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:02:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:02:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 362 transitions. [2025-01-10 01:02:52,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2025-01-10 01:02:52,750 INFO L175 Difference]: Start difference. First operand has 245 places, 263 transitions, 4672 flow. Second operand 9 states and 362 transitions. [2025-01-10 01:02:52,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 356 transitions, 6455 flow [2025-01-10 01:02:53,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 356 transitions, 6237 flow, removed 2 selfloop flow, removed 9 redundant places. [2025-01-10 01:02:53,280 INFO L231 Difference]: Finished difference. Result has 244 places, 260 transitions, 4584 flow [2025-01-10 01:02:53,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4584, PETRI_PLACES=244, PETRI_TRANSITIONS=260} [2025-01-10 01:02:53,281 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 186 predicate places. [2025-01-10 01:02:53,281 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 260 transitions, 4584 flow [2025-01-10 01:02:53,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 32.77777777777778) internal successors, (295), 9 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 01:02:53,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:53,282 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:53,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2025-01-10 01:02:53,282 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:02:53,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:53,283 INFO L85 PathProgramCache]: Analyzing trace with hash -624649579, now seen corresponding path program 6 times [2025-01-10 01:02:53,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:53,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476802955] [2025-01-10 01:02:53,283 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:02:53,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:53,291 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 3 equivalence classes. [2025-01-10 01:02:53,297 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-01-10 01:02:53,297 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-01-10 01:02:53,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:02:53,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:53,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476802955] [2025-01-10 01:02:53,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476802955] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:53,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:53,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-01-10 01:02:53,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161165635] [2025-01-10 01:02:53,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:53,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 01:02:53,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:53,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 01:02:53,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:02:53,736 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-01-10 01:02:53,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 260 transitions, 4584 flow. Second operand has 10 states, 10 states have (on average 32.5) internal successors, (325), 10 states have internal predecessors, (325), 0 states have call successors, (0), 0 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 01:02:53,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:53,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-01-10 01:02:53,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand