./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.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 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:05:04,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:05:05,020 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:05:05,025 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:05:05,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:05:05,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:05:05,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:05:05,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:05:05,045 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:05:05,045 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:05:05,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:05:05,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:05:05,046 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:05:05,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:05:05,047 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:05:05,047 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:05:05,047 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:05:05,047 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:05:05,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:05:05,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:05:05,047 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:05:05,047 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:05:05,047 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:05:05,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:05:05,048 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:05:05,048 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:05:05,048 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:05:05,048 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:05:05,048 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:05:05,048 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:05:05,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:05:05,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:05:05,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:05:05,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:05:05,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:05:05,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:05:05,049 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:05:05,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:05:05,049 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:05:05,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:05:05,049 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:05:05,049 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:05:05,049 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 -> 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 [2025-02-06 13:05:05,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:05:05,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:05:05,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:05:05,268 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:05:05,268 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:05:05,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2025-02-06 13:05:06,373 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2ca7bd355/026d61843b3c478e8776b553471de2f9/FLAG0dc6b5ff8 [2025-02-06 13:05:06,627 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:05:06,641 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2025-02-06 13:05:06,659 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2ca7bd355/026d61843b3c478e8776b553471de2f9/FLAG0dc6b5ff8 [2025-02-06 13:05:06,950 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2ca7bd355/026d61843b3c478e8776b553471de2f9 [2025-02-06 13:05:06,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:05:06,952 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:05:06,953 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:05:06,953 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:05:06,956 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:05:06,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:05:06" (1/1) ... [2025-02-06 13:05:06,957 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@302e3584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:06, skipping insertion in model container [2025-02-06 13:05:06,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:05:06" (1/1) ... [2025-02-06 13:05:06,967 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:05:07,092 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:05:07,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:05:07,108 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:05:07,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:05:07,149 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:05:07,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07 WrapperNode [2025-02-06 13:05:07,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:05:07,150 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:05:07,151 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:05:07,151 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:05:07,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,163 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,187 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 247 [2025-02-06 13:05:07,190 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:05:07,191 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:05:07,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:05:07,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:05:07,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,204 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,223 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 13:05:07,224 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,224 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,234 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,235 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,236 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,241 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:05:07,244 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:05:07,244 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:05:07,244 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:05:07,245 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (1/1) ... [2025-02-06 13:05:07,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:05:07,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:07,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:05:07,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:05:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:05:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:05:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:05:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:05:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:05:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:05:07,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:05:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:05:07,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:05:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:05:07,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:05:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-06 13:05:07,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-06 13:05:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:05:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:05:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:05:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:05:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:05:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:05:07,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:05:07,297 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:05:07,375 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:05:07,376 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:05:07,716 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:05:07,716 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:05:07,947 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:05:07,947 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:05:07,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:05:07 BoogieIcfgContainer [2025-02-06 13:05:07,947 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:05:07,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:05:07,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:05:07,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:05:07,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:05:06" (1/3) ... [2025-02-06 13:05:07,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@accfeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:05:07, skipping insertion in model container [2025-02-06 13:05:07,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:07" (2/3) ... [2025-02-06 13:05:07,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@accfeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:05:07, skipping insertion in model container [2025-02-06 13:05:07,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:05:07" (3/3) ... [2025-02-06 13:05:07,955 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2025-02-06 13:05:07,966 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:05:07,967 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-parallel-sum-equiv.wvr.c that has 5 procedures, 59 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2025-02-06 13:05:07,967 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:05:08,015 INFO L143 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2025-02-06 13:05:08,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 70 transitions, 180 flow [2025-02-06 13:05:08,065 INFO L124 PetriNetUnfolderBase]: 9/63 cut-off events. [2025-02-06 13:05:08,068 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:05:08,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 63 events. 9/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 134 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2025-02-06 13:05:08,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 70 transitions, 180 flow [2025-02-06 13:05:08,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 62 transitions, 154 flow [2025-02-06 13:05:08,078 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:05:08,088 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;@4789cb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:05:08,088 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2025-02-06 13:05:08,090 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:05:08,090 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:05:08,090 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:05:08,091 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:08,091 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:05:08,091 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:08,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:08,094 INFO L85 PathProgramCache]: Analyzing trace with hash 729952, now seen corresponding path program 1 times [2025-02-06 13:05:08,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:08,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829585679] [2025-02-06 13:05:08,099 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:08,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:08,150 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:05:08,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:05:08,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:08,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:08,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:08,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829585679] [2025-02-06 13:05:08,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829585679] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:08,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:08,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:05:08,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336413398] [2025-02-06 13:05:08,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:08,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:05:08,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:08,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:05:08,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:05:08,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2025-02-06 13:05:08,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:08,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:08,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2025-02-06 13:05:08,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:10,100 INFO L124 PetriNetUnfolderBase]: 14986/20198 cut-off events. [2025-02-06 13:05:10,101 INFO L125 PetriNetUnfolderBase]: For 1062/1062 co-relation queries the response was YES. [2025-02-06 13:05:10,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41822 conditions, 20198 events. 14986/20198 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 103947 event pairs, 13324 based on Foata normal form. 1/15683 useless extension candidates. Maximal degree in co-relation 41747. Up to 20169 conditions per place. [2025-02-06 13:05:10,218 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 49 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2025-02-06 13:05:10,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 244 flow [2025-02-06 13:05:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:05:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:05:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2025-02-06 13:05:10,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2025-02-06 13:05:10,228 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 154 flow. Second operand 3 states and 86 transitions. [2025-02-06 13:05:10,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 244 flow [2025-02-06 13:05:10,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 13:05:10,241 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 126 flow [2025-02-06 13:05:10,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2025-02-06 13:05:10,245 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2025-02-06 13:05:10,245 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 126 flow [2025-02-06 13:05:10,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:10,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:10,246 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:05:10,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:05:10,246 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:10,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash 729953, now seen corresponding path program 1 times [2025-02-06 13:05:10,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:10,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36200105] [2025-02-06 13:05:10,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:10,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:10,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:05:10,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:05:10,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:10,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:10,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36200105] [2025-02-06 13:05:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36200105] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:10,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:05:10,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538124538] [2025-02-06 13:05:10,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:10,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:10,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:10,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:10,561 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2025-02-06 13:05:10,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:10,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:10,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2025-02-06 13:05:10,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:11,704 INFO L124 PetriNetUnfolderBase]: 14987/20201 cut-off events. [2025-02-06 13:05:11,705 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2025-02-06 13:05:11,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40858 conditions, 20201 events. 14987/20201 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 103846 event pairs, 13324 based on Foata normal form. 0/15685 useless extension candidates. Maximal degree in co-relation 40836. Up to 20174 conditions per place. [2025-02-06 13:05:11,797 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 51 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-02-06 13:05:11,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 244 flow [2025-02-06 13:05:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2025-02-06 13:05:11,799 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-02-06 13:05:11,799 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 126 flow. Second operand 4 states and 96 transitions. [2025-02-06 13:05:11,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 244 flow [2025-02-06 13:05:11,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:11,802 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 149 flow [2025-02-06 13:05:11,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2025-02-06 13:05:11,803 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2025-02-06 13:05:11,803 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 149 flow [2025-02-06 13:05:11,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:11,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:11,804 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:05:11,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:05:11,805 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:11,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:11,805 INFO L85 PathProgramCache]: Analyzing trace with hash 701507490, now seen corresponding path program 1 times [2025-02-06 13:05:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:11,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109759970] [2025-02-06 13:05:11,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:11,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:11,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:05:11,830 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:05:11,833 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:11,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:12,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:12,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109759970] [2025-02-06 13:05:12,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109759970] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:12,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524385680] [2025-02-06 13:05:12,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:12,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:12,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:12,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:05:12,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:05:12,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:05:12,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:05:12,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:12,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:12,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:05:12,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:12,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:05:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:12,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524385680] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:12,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:05:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865037675] [2025-02-06 13:05:12,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:12,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:05:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:12,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:05:12,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:05:12,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2025-02-06 13:05:12,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 149 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:12,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:12,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2025-02-06 13:05:12,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:13,394 INFO L124 PetriNetUnfolderBase]: 14987/20200 cut-off events. [2025-02-06 13:05:13,394 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2025-02-06 13:05:13,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40865 conditions, 20200 events. 14987/20200 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 104002 event pairs, 13324 based on Foata normal form. 0/15684 useless extension candidates. Maximal degree in co-relation 40843. Up to 20170 conditions per place. [2025-02-06 13:05:13,466 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2025-02-06 13:05:13,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 253 flow [2025-02-06 13:05:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:05:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:05:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2025-02-06 13:05:13,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2662037037037037 [2025-02-06 13:05:13,468 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 149 flow. Second operand 6 states and 115 transitions. [2025-02-06 13:05:13,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 253 flow [2025-02-06 13:05:13,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:05:13,469 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 156 flow [2025-02-06 13:05:13,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2025-02-06 13:05:13,470 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2025-02-06 13:05:13,470 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 156 flow [2025-02-06 13:05:13,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:13,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:13,470 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:13,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:05:13,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:13,672 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:13,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -387183865, now seen corresponding path program 1 times [2025-02-06 13:05:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:13,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867091490] [2025-02-06 13:05:13,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:13,680 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:05:13,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:05:13,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:13,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:13,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:13,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867091490] [2025-02-06 13:05:13,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867091490] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:13,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:13,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:05:13,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556356579] [2025-02-06 13:05:13,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:13,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:13,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:13,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:13,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:13,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2025-02-06 13:05:13,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:13,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:13,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2025-02-06 13:05:13,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:14,400 INFO L124 PetriNetUnfolderBase]: 11187/15107 cut-off events. [2025-02-06 13:05:14,400 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2025-02-06 13:05:14,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30601 conditions, 15107 events. 11187/15107 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 74431 event pairs, 9814 based on Foata normal form. 0/12548 useless extension candidates. Maximal degree in co-relation 30575. Up to 15076 conditions per place. [2025-02-06 13:05:14,473 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 48 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2025-02-06 13:05:14,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 252 flow [2025-02-06 13:05:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2025-02-06 13:05:14,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3159722222222222 [2025-02-06 13:05:14,475 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 156 flow. Second operand 4 states and 91 transitions. [2025-02-06 13:05:14,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 252 flow [2025-02-06 13:05:14,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 222 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-06 13:05:14,476 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 126 flow [2025-02-06 13:05:14,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-02-06 13:05:14,477 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2025-02-06 13:05:14,477 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 126 flow [2025-02-06 13:05:14,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:14,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:14,477 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:14,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:05:14,478 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:14,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash -387183864, now seen corresponding path program 1 times [2025-02-06 13:05:14,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:14,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913285156] [2025-02-06 13:05:14,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:14,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:05:14,487 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:05:14,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:14,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:14,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:14,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913285156] [2025-02-06 13:05:14,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913285156] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:14,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:14,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:05:14,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234370638] [2025-02-06 13:05:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:14,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:14,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:14,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:14,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:14,550 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:14,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:14,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:14,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:14,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:15,695 INFO L124 PetriNetUnfolderBase]: 19693/26747 cut-off events. [2025-02-06 13:05:15,696 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2025-02-06 13:05:15,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54196 conditions, 26747 events. 19693/26747 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 147061 event pairs, 11285 based on Foata normal form. 391/22809 useless extension candidates. Maximal degree in co-relation 30487. Up to 15035 conditions per place. [2025-02-06 13:05:15,779 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 118 selfloop transitions, 4 changer transitions 0/126 dead transitions. [2025-02-06 13:05:15,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 126 transitions, 529 flow [2025-02-06 13:05:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2025-02-06 13:05:15,781 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2025-02-06 13:05:15,781 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 126 flow. Second operand 5 states and 179 transitions. [2025-02-06 13:05:15,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 126 transitions, 529 flow [2025-02-06 13:05:15,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 126 transitions, 525 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:15,782 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 141 flow [2025-02-06 13:05:15,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2025-02-06 13:05:15,783 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2025-02-06 13:05:15,783 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 141 flow [2025-02-06 13:05:15,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:15,783 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:15,783 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:15,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:05:15,783 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:15,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash -451268357, now seen corresponding path program 1 times [2025-02-06 13:05:15,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:15,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760377075] [2025-02-06 13:05:15,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:15,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:15,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:05:15,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:05:15,793 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:15,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:15,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:15,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760377075] [2025-02-06 13:05:15,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760377075] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:15,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:15,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:05:15,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711298751] [2025-02-06 13:05:15,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:15,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:15,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:15,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:15,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:15,867 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:15,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:15,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:15,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:15,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:16,583 INFO L124 PetriNetUnfolderBase]: 14905/20422 cut-off events. [2025-02-06 13:05:16,583 INFO L125 PetriNetUnfolderBase]: For 1535/1535 co-relation queries the response was YES. [2025-02-06 13:05:16,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42932 conditions, 20422 events. 14905/20422 cut-off events. For 1535/1535 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 108447 event pairs, 11441 based on Foata normal form. 432/17552 useless extension candidates. Maximal degree in co-relation 31741. Up to 15079 conditions per place. [2025-02-06 13:05:16,629 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 87 selfloop transitions, 4 changer transitions 4/99 dead transitions. [2025-02-06 13:05:16,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 432 flow [2025-02-06 13:05:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2025-02-06 13:05:16,630 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2025-02-06 13:05:16,630 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 141 flow. Second operand 5 states and 154 transitions. [2025-02-06 13:05:16,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 432 flow [2025-02-06 13:05:16,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 427 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:16,633 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 159 flow [2025-02-06 13:05:16,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2025-02-06 13:05:16,633 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2025-02-06 13:05:16,633 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 159 flow [2025-02-06 13:05:16,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:16,634 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:16,634 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:16,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:05:16,634 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:16,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash 208071591, now seen corresponding path program 1 times [2025-02-06 13:05:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727381040] [2025-02-06 13:05:16,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:16,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:05:16,643 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:05:16,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:16,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:16,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727381040] [2025-02-06 13:05:16,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727381040] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028126783] [2025-02-06 13:05:16,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:16,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:16,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:05:16,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:05:16,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:05:16,764 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:05:16,764 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:16,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:16,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:05:16,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:16,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:16,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028126783] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:16,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:16,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 13:05:16,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251749946] [2025-02-06 13:05:16,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:16,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:05:16,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:16,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:05:16,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:05:16,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:16,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 159 flow. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:16,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:16,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:16,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:18,121 INFO L124 PetriNetUnfolderBase]: 23412/32029 cut-off events. [2025-02-06 13:05:18,121 INFO L125 PetriNetUnfolderBase]: For 3113/3113 co-relation queries the response was YES. [2025-02-06 13:05:18,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69768 conditions, 32029 events. 23412/32029 cut-off events. For 3113/3113 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 184195 event pairs, 9882 based on Foata normal form. 391/27342 useless extension candidates. Maximal degree in co-relation 58577. Up to 13384 conditions per place. [2025-02-06 13:05:18,236 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 148 selfloop transitions, 10 changer transitions 0/162 dead transitions. [2025-02-06 13:05:18,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 162 transitions, 746 flow [2025-02-06 13:05:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:05:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:05:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2025-02-06 13:05:18,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4253472222222222 [2025-02-06 13:05:18,238 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 159 flow. Second operand 8 states and 245 transitions. [2025-02-06 13:05:18,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 162 transitions, 746 flow [2025-02-06 13:05:18,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 162 transitions, 741 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:18,242 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 213 flow [2025-02-06 13:05:18,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=213, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2025-02-06 13:05:18,243 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2025-02-06 13:05:18,243 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 213 flow [2025-02-06 13:05:18,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:18,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:18,243 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:18,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:05:18,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:18,447 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:18,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash 821781564, now seen corresponding path program 1 times [2025-02-06 13:05:18,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:18,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263243711] [2025-02-06 13:05:18,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:18,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:18,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:05:18,463 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:05:18,464 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:18,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:18,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:18,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263243711] [2025-02-06 13:05:18,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263243711] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:18,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254747317] [2025-02-06 13:05:18,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:18,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:18,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:18,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:05:18,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:05:18,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:05:18,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:05:18,601 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:18,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:18,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:05:18,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:18,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:18,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254747317] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:18,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:18,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 13:05:18,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678499006] [2025-02-06 13:05:18,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:18,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:05:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:18,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:05:18,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:05:18,768 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:18,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 213 flow. Second operand has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 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) [2025-02-06 13:05:18,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:18,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:18,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:20,031 INFO L124 PetriNetUnfolderBase]: 18228/25344 cut-off events. [2025-02-06 13:05:20,031 INFO L125 PetriNetUnfolderBase]: For 6897/6897 co-relation queries the response was YES. [2025-02-06 13:05:20,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57488 conditions, 25344 events. 18228/25344 cut-off events. For 6897/6897 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 142272 event pairs, 9011 based on Foata normal form. 612/22072 useless extension candidates. Maximal degree in co-relation 39434. Up to 10410 conditions per place. [2025-02-06 13:05:20,138 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 111 selfloop transitions, 11 changer transitions 4/130 dead transitions. [2025-02-06 13:05:20,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 130 transitions, 647 flow [2025-02-06 13:05:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:05:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:05:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2025-02-06 13:05:20,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2025-02-06 13:05:20,140 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 213 flow. Second operand 8 states and 219 transitions. [2025-02-06 13:05:20,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 130 transitions, 647 flow [2025-02-06 13:05:20,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 130 transitions, 630 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:20,148 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 269 flow [2025-02-06 13:05:20,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=269, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2025-02-06 13:05:20,149 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2025-02-06 13:05:20,151 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 269 flow [2025-02-06 13:05:20,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 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) [2025-02-06 13:05:20,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:20,152 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:20,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 13:05:20,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:20,352 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:20,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:20,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1017913478, now seen corresponding path program 2 times [2025-02-06 13:05:20,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:20,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931407390] [2025-02-06 13:05:20,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:20,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:20,359 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-06 13:05:20,371 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 10 of 14 statements. [2025-02-06 13:05:20,371 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:05:20,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:05:20,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:20,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931407390] [2025-02-06 13:05:20,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931407390] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:20,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:20,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:05:20,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666598197] [2025-02-06 13:05:20,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:20,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:20,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:20,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:20,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:20,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:20,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:20,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:20,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:20,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:22,714 INFO L124 PetriNetUnfolderBase]: 24944/34337 cut-off events. [2025-02-06 13:05:22,714 INFO L125 PetriNetUnfolderBase]: For 12371/12371 co-relation queries the response was YES. [2025-02-06 13:05:22,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83458 conditions, 34337 events. 24944/34337 cut-off events. For 12371/12371 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 198162 event pairs, 10774 based on Foata normal form. 0/29132 useless extension candidates. Maximal degree in co-relation 61675. Up to 17334 conditions per place. [2025-02-06 13:05:22,907 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 95 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2025-02-06 13:05:22,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 626 flow [2025-02-06 13:05:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2025-02-06 13:05:22,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2025-02-06 13:05:22,909 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 269 flow. Second operand 5 states and 142 transitions. [2025-02-06 13:05:22,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 626 flow [2025-02-06 13:05:22,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 596 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-02-06 13:05:22,930 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 278 flow [2025-02-06 13:05:22,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=83, PETRI_TRANSITIONS=66} [2025-02-06 13:05:22,931 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2025-02-06 13:05:22,931 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 278 flow [2025-02-06 13:05:22,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:22,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:22,931 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:22,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:05:22,931 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:22,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash 157076285, now seen corresponding path program 2 times [2025-02-06 13:05:22,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:22,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921404653] [2025-02-06 13:05:22,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:22,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:22,937 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-06 13:05:22,945 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 11 of 15 statements. [2025-02-06 13:05:22,948 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:05:22,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:05:23,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:23,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921404653] [2025-02-06 13:05:23,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921404653] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:23,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:23,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:05:23,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373268879] [2025-02-06 13:05:23,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:23,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:23,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:23,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:23,064 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:23,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 66 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:23,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:23,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:23,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:24,781 INFO L124 PetriNetUnfolderBase]: 32963/45360 cut-off events. [2025-02-06 13:05:24,782 INFO L125 PetriNetUnfolderBase]: For 20503/20503 co-relation queries the response was YES. [2025-02-06 13:05:24,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110894 conditions, 45360 events. 32963/45360 cut-off events. For 20503/20503 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 262236 event pairs, 16158 based on Foata normal form. 0/38432 useless extension candidates. Maximal degree in co-relation 88652. Up to 23855 conditions per place. [2025-02-06 13:05:25,077 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 94 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2025-02-06 13:05:25,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 107 transitions, 636 flow [2025-02-06 13:05:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2025-02-06 13:05:25,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-02-06 13:05:25,078 INFO L175 Difference]: Start difference. First operand has 83 places, 66 transitions, 278 flow. Second operand 5 states and 140 transitions. [2025-02-06 13:05:25,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 107 transitions, 636 flow [2025-02-06 13:05:25,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 107 transitions, 612 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-02-06 13:05:25,101 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 305 flow [2025-02-06 13:05:25,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=305, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2025-02-06 13:05:25,101 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2025-02-06 13:05:25,102 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 305 flow [2025-02-06 13:05:25,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:25,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:25,102 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:25,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:05:25,102 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:25,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:25,102 INFO L85 PathProgramCache]: Analyzing trace with hash -764267069, now seen corresponding path program 1 times [2025-02-06 13:05:25,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:25,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089554004] [2025-02-06 13:05:25,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:25,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:25,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:05:25,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:05:25,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:25,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:25,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:25,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089554004] [2025-02-06 13:05:25,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089554004] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:25,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85148972] [2025-02-06 13:05:25,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:25,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:25,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:25,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:05:25,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:05:25,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:05:25,282 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:05:25,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:25,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:25,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:05:25,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:25,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:25,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85148972] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:25,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:25,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2025-02-06 13:05:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185281126] [2025-02-06 13:05:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:25,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:05:25,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:25,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:05:25,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:05:25,451 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:25,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 305 flow. Second operand has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:25,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:25,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:25,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:29,205 INFO L124 PetriNetUnfolderBase]: 56306/77114 cut-off events. [2025-02-06 13:05:29,205 INFO L125 PetriNetUnfolderBase]: For 36301/36301 co-relation queries the response was YES. [2025-02-06 13:05:29,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192279 conditions, 77114 events. 56306/77114 cut-off events. For 36301/36301 co-relation queries the response was YES. Maximal size of possible extension queue 1811. Compared 480339 event pairs, 19888 based on Foata normal form. 568/66330 useless extension candidates. Maximal degree in co-relation 170079. Up to 25890 conditions per place. [2025-02-06 13:05:29,640 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 245 selfloop transitions, 16 changer transitions 0/265 dead transitions. [2025-02-06 13:05:29,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 265 transitions, 1602 flow [2025-02-06 13:05:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:05:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:05:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 350 transitions. [2025-02-06 13:05:29,642 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2025-02-06 13:05:29,642 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 305 flow. Second operand 11 states and 350 transitions. [2025-02-06 13:05:29,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 265 transitions, 1602 flow [2025-02-06 13:05:29,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 265 transitions, 1520 flow, removed 24 selfloop flow, removed 3 redundant places. [2025-02-06 13:05:29,667 INFO L231 Difference]: Finished difference. Result has 97 places, 75 transitions, 392 flow [2025-02-06 13:05:29,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=392, PETRI_PLACES=97, PETRI_TRANSITIONS=75} [2025-02-06 13:05:29,668 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2025-02-06 13:05:29,668 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 75 transitions, 392 flow [2025-02-06 13:05:29,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:29,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:29,668 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:29,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 13:05:29,868 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,SelfDestructingSolverStorable10 [2025-02-06 13:05:29,869 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:29,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash 751165242, now seen corresponding path program 1 times [2025-02-06 13:05:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:29,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114107302] [2025-02-06 13:05:29,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:29,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:05:29,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:05:29,884 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:29,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:29,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:29,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114107302] [2025-02-06 13:05:29,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114107302] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:29,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767012106] [2025-02-06 13:05:29,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:29,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:29,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:29,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:05:29,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:05:30,033 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:05:30,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:05:30,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:30,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:30,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:05:30,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:30,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767012106] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:30,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:30,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2025-02-06 13:05:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064863754] [2025-02-06 13:05:30,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:30,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:05:30,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:30,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:05:30,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:05:30,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:30,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 75 transitions, 392 flow. Second operand has 17 states, 17 states have (on average 13.705882352941176) internal successors, (233), 17 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:30,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:30,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:30,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:34,558 INFO L124 PetriNetUnfolderBase]: 51896/71503 cut-off events. [2025-02-06 13:05:34,559 INFO L125 PetriNetUnfolderBase]: For 47194/47194 co-relation queries the response was YES. [2025-02-06 13:05:34,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180885 conditions, 71503 events. 51896/71503 cut-off events. For 47194/47194 co-relation queries the response was YES. Maximal size of possible extension queue 1656. Compared 439320 event pairs, 15998 based on Foata normal form. 780/62063 useless extension candidates. Maximal degree in co-relation 157066. Up to 18797 conditions per place. [2025-02-06 13:05:34,904 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 187 selfloop transitions, 20 changer transitions 4/215 dead transitions. [2025-02-06 13:05:34,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 215 transitions, 1328 flow [2025-02-06 13:05:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:05:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:05:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 313 transitions. [2025-02-06 13:05:34,906 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3952020202020202 [2025-02-06 13:05:34,906 INFO L175 Difference]: Start difference. First operand has 97 places, 75 transitions, 392 flow. Second operand 11 states and 313 transitions. [2025-02-06 13:05:34,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 215 transitions, 1328 flow [2025-02-06 13:05:34,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 215 transitions, 1316 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:34,936 INFO L231 Difference]: Finished difference. Result has 108 places, 84 transitions, 515 flow [2025-02-06 13:05:34,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=515, PETRI_PLACES=108, PETRI_TRANSITIONS=84} [2025-02-06 13:05:34,938 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 42 predicate places. [2025-02-06 13:05:34,938 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 84 transitions, 515 flow [2025-02-06 13:05:34,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.705882352941176) internal successors, (233), 17 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:34,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:34,939 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:34,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 13:05:35,143 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,SelfDestructingSolverStorable11 [2025-02-06 13:05:35,143 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:35,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash -745666718, now seen corresponding path program 2 times [2025-02-06 13:05:35,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:35,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258832098] [2025-02-06 13:05:35,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:35,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:35,157 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:05:35,169 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:05:35,169 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:05:35,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:05:35,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258832098] [2025-02-06 13:05:35,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258832098] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:35,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:35,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:05:35,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547212526] [2025-02-06 13:05:35,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:35,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:35,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:35,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:35,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:35,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 84 transitions, 515 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:35,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:35,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:35,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:39,663 INFO L124 PetriNetUnfolderBase]: 50283/69154 cut-off events. [2025-02-06 13:05:39,664 INFO L125 PetriNetUnfolderBase]: For 63869/63869 co-relation queries the response was YES. [2025-02-06 13:05:39,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183445 conditions, 69154 events. 50283/69154 cut-off events. For 63869/63869 co-relation queries the response was YES. Maximal size of possible extension queue 1681. Compared 440813 event pairs, 5099 based on Foata normal form. 0/59816 useless extension candidates. Maximal degree in co-relation 158376. Up to 60513 conditions per place. [2025-02-06 13:05:40,253 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 115 selfloop transitions, 9 changer transitions 0/128 dead transitions. [2025-02-06 13:05:40,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 128 transitions, 1009 flow [2025-02-06 13:05:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2025-02-06 13:05:40,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2025-02-06 13:05:40,254 INFO L175 Difference]: Start difference. First operand has 108 places, 84 transitions, 515 flow. Second operand 5 states and 133 transitions. [2025-02-06 13:05:40,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 128 transitions, 1009 flow [2025-02-06 13:05:40,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 128 transitions, 986 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-02-06 13:05:40,502 INFO L231 Difference]: Finished difference. Result has 107 places, 83 transitions, 510 flow [2025-02-06 13:05:40,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=510, PETRI_PLACES=107, PETRI_TRANSITIONS=83} [2025-02-06 13:05:40,502 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 41 predicate places. [2025-02-06 13:05:40,503 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 83 transitions, 510 flow [2025-02-06 13:05:40,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:40,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:40,503 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:40,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-06 13:05:40,503 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:40,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:40,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1327776123, now seen corresponding path program 2 times [2025-02-06 13:05:40,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:40,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746644172] [2025-02-06 13:05:40,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:40,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:40,508 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 13:05:40,515 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:05:40,515 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:05:40,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:05:40,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:40,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746644172] [2025-02-06 13:05:40,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746644172] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:40,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:40,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:05:40,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771577536] [2025-02-06 13:05:40,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:40,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:40,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:40,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:40,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:40,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:40,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 83 transitions, 510 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:40,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:40,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:40,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:44,514 INFO L124 PetriNetUnfolderBase]: 47275/65263 cut-off events. [2025-02-06 13:05:44,514 INFO L125 PetriNetUnfolderBase]: For 63804/63804 co-relation queries the response was YES. [2025-02-06 13:05:44,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171629 conditions, 65263 events. 47275/65263 cut-off events. For 63804/63804 co-relation queries the response was YES. Maximal size of possible extension queue 1596. Compared 405938 event pairs, 18656 based on Foata normal form. 0/56973 useless extension candidates. Maximal degree in co-relation 146101. Up to 64604 conditions per place. [2025-02-06 13:05:44,881 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 87 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2025-02-06 13:05:44,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 100 transitions, 810 flow [2025-02-06 13:05:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2025-02-06 13:05:44,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3138888888888889 [2025-02-06 13:05:44,883 INFO L175 Difference]: Start difference. First operand has 107 places, 83 transitions, 510 flow. Second operand 5 states and 113 transitions. [2025-02-06 13:05:44,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 100 transitions, 810 flow [2025-02-06 13:05:44,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 100 transitions, 792 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:05:44,958 INFO L231 Difference]: Finished difference. Result has 106 places, 81 transitions, 498 flow [2025-02-06 13:05:44,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=106, PETRI_TRANSITIONS=81} [2025-02-06 13:05:44,958 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2025-02-06 13:05:44,958 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 81 transitions, 498 flow [2025-02-06 13:05:44,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:44,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:44,959 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, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:44,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:05:44,959 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:44,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:44,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1830273086, now seen corresponding path program 1 times [2025-02-06 13:05:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:44,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430005082] [2025-02-06 13:05:44,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:44,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-06 13:05:44,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-06 13:05:44,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:44,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:44,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430005082] [2025-02-06 13:05:44,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430005082] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:44,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:44,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:05:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455421176] [2025-02-06 13:05:44,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:44,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:44,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:44,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:44,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:44,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:44,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 81 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:44,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:44,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:44,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:50,410 INFO L124 PetriNetUnfolderBase]: 63963/88088 cut-off events. [2025-02-06 13:05:50,411 INFO L125 PetriNetUnfolderBase]: For 74912/74912 co-relation queries the response was YES. [2025-02-06 13:05:50,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229815 conditions, 88088 events. 63963/88088 cut-off events. For 74912/74912 co-relation queries the response was YES. Maximal size of possible extension queue 2114. Compared 566285 event pairs, 26714 based on Foata normal form. 4/77012 useless extension candidates. Maximal degree in co-relation 187383. Up to 34944 conditions per place. [2025-02-06 13:05:50,947 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 161 selfloop transitions, 10 changer transitions 6/181 dead transitions. [2025-02-06 13:05:50,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 181 transitions, 1350 flow [2025-02-06 13:05:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2025-02-06 13:05:50,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5590277777777778 [2025-02-06 13:05:50,948 INFO L175 Difference]: Start difference. First operand has 106 places, 81 transitions, 498 flow. Second operand 4 states and 161 transitions. [2025-02-06 13:05:50,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 181 transitions, 1350 flow [2025-02-06 13:05:51,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 181 transitions, 1332 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:05:51,416 INFO L231 Difference]: Finished difference. Result has 108 places, 87 transitions, 560 flow [2025-02-06 13:05:51,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=560, PETRI_PLACES=108, PETRI_TRANSITIONS=87} [2025-02-06 13:05:51,416 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 42 predicate places. [2025-02-06 13:05:51,416 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 87 transitions, 560 flow [2025-02-06 13:05:51,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:51,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:51,417 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, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:51,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:05:51,417 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-06 13:05:51,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1966933146, now seen corresponding path program 2 times [2025-02-06 13:05:51,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:51,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910770109] [2025-02-06 13:05:51,417 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:51,426 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 1 equivalence classes. [2025-02-06 13:05:51,428 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-06 13:05:51,428 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:05:51,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:51,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910770109] [2025-02-06 13:05:51,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910770109] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:51,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:51,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:05:51,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641180316] [2025-02-06 13:05:51,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:51,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:51,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:51,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:51,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:51,454 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-06 13:05:51,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 87 transitions, 560 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:51,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:51,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-06 13:05:51,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:56,736 INFO L124 PetriNetUnfolderBase]: 61116/83884 cut-off events. [2025-02-06 13:05:56,736 INFO L125 PetriNetUnfolderBase]: For 91518/91521 co-relation queries the response was YES. [2025-02-06 13:05:57,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229620 conditions, 83884 events. 61116/83884 cut-off events. For 91518/91521 co-relation queries the response was YES. Maximal size of possible extension queue 2052. Compared 528217 event pairs, 19445 based on Foata normal form. 4/73628 useless extension candidates. Maximal degree in co-relation 203979. Up to 34045 conditions per place.