./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.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/popl20-commit-1.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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:06:27,225 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:06:27,260 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:06:27,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:06:27,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:06:27,285 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:06:27,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:06:27,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:06:27,287 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:06:27,287 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:06:27,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:06:27,287 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:06:27,287 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:06:27,287 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:06:27,287 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:06:27,287 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:06:27,288 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:06:27,289 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:06:27,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:06:27,289 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:06:27,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:06:27,290 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 -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2025-02-06 13:06:27,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:06:27,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:06:27,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:06:27,487 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:06:27,487 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:06:27,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2025-02-06 13:06:28,701 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/50c165a44/ffec5c98ebbe416ab048ff0de5eba61e/FLAG6ff14c85c [2025-02-06 13:06:29,017 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:06:29,018 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2025-02-06 13:06:29,023 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/50c165a44/ffec5c98ebbe416ab048ff0de5eba61e/FLAG6ff14c85c [2025-02-06 13:06:29,282 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/50c165a44/ffec5c98ebbe416ab048ff0de5eba61e [2025-02-06 13:06:29,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:06:29,286 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:06:29,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:06:29,287 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:06:29,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:06:29,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6969ebf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29, skipping insertion in model container [2025-02-06 13:06:29,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,307 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:06:29,434 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 13:06:29,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:06:29,447 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:06:29,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:06:29,484 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:06:29,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29 WrapperNode [2025-02-06 13:06:29,485 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:06:29,486 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:06:29,486 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:06:29,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:06:29,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,496 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,522 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 327 [2025-02-06 13:06:29,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:06:29,525 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:06:29,527 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:06:29,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:06:29,535 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,539 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,559 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-06 13:06:29,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,565 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,565 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,566 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,567 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:06:29,569 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:06:29,569 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:06:29,569 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:06:29,570 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (1/1) ... [2025-02-06 13:06:29,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:06:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:29,593 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 13:06:29,596 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 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:06:29,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:06:29,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:06:29,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:06:29,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:06:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:06:29,611 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 13:06:29,678 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:06:29,679 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:06:30,063 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:06:30,063 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:06:30,431 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:06:30,431 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:06:30,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:06:30 BoogieIcfgContainer [2025-02-06 13:06:30,431 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:06:30,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:06:30,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:06:30,439 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:06:30,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:06:29" (1/3) ... [2025-02-06 13:06:30,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ae269f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:06:30, skipping insertion in model container [2025-02-06 13:06:30,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:29" (2/3) ... [2025-02-06 13:06:30,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ae269f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:06:30, skipping insertion in model container [2025-02-06 13:06:30,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:06:30" (3/3) ... [2025-02-06 13:06:30,442 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2025-02-06 13:06:30,455 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:06:30,456 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-commit-1.wvr.c that has 4 procedures, 67 locations, 1 initial locations, 6 loop locations, and 24 error locations. [2025-02-06 13:06:30,456 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:06:30,509 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:06:30,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 171 flow [2025-02-06 13:06:30,569 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2025-02-06 13:06:30,572 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:06:30,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 9/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2025-02-06 13:06:30,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 171 flow [2025-02-06 13:06:30,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 160 flow [2025-02-06 13:06:30,588 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:06:30,599 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;@7f2aa855, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:06:30,599 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2025-02-06 13:06:30,601 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:06:30,601 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:06:30,601 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:06:30,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:30,601 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:06:30,602 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:30,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 920790, now seen corresponding path program 1 times [2025-02-06 13:06:30,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:30,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129342813] [2025-02-06 13:06:30,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:30,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:30,664 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:06:30,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:06:30,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:30,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:30,809 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 13:06:30,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:30,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129342813] [2025-02-06 13:06:30,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129342813] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:30,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:30,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:06:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806204517] [2025-02-06 13:06:30,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:30,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:30,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:30,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:30,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-02-06 13:06:30,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:30,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:30,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-02-06 13:06:30,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:32,204 INFO L124 PetriNetUnfolderBase]: 11284/15951 cut-off events. [2025-02-06 13:06:32,204 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2025-02-06 13:06:32,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32435 conditions, 15951 events. 11284/15951 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 91017 event pairs, 10210 based on Foata normal form. 1/9516 useless extension candidates. Maximal degree in co-relation 31495. Up to 15928 conditions per place. [2025-02-06 13:06:32,307 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2025-02-06 13:06:32,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 256 flow [2025-02-06 13:06:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-02-06 13:06:32,317 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2025-02-06 13:06:32,318 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 160 flow. Second operand 3 states and 96 transitions. [2025-02-06 13:06:32,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 256 flow [2025-02-06 13:06:32,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:06:32,326 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2025-02-06 13:06:32,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2025-02-06 13:06:32,334 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2025-02-06 13:06:32,334 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2025-02-06 13:06:32,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:32,334 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:32,334 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:06:32,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:06:32,335 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:32,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash 920791, now seen corresponding path program 1 times [2025-02-06 13:06:32,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:32,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227912689] [2025-02-06 13:06:32,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:32,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:32,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:06:32,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:06:32,378 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:32,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:32,595 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 13:06:32,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:32,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227912689] [2025-02-06 13:06:32,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227912689] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:32,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:32,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:32,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200675707] [2025-02-06 13:06:32,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:32,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:32,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:32,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:32,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:32,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-02-06 13:06:32,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:32,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:32,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-02-06 13:06:32,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:33,714 INFO L124 PetriNetUnfolderBase]: 11284/15948 cut-off events. [2025-02-06 13:06:33,715 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2025-02-06 13:06:33,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32094 conditions, 15948 events. 11284/15948 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 90967 event pairs, 10210 based on Foata normal form. 0/9513 useless extension candidates. Maximal degree in co-relation 32069. Up to 15928 conditions per place. [2025-02-06 13:06:33,775 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 48 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2025-02-06 13:06:33,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 242 flow [2025-02-06 13:06:33,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2025-02-06 13:06:33,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3433333333333333 [2025-02-06 13:06:33,778 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 103 transitions. [2025-02-06 13:06:33,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 242 flow [2025-02-06 13:06:33,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:33,780 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 142 flow [2025-02-06 13:06:33,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2025-02-06 13:06:33,780 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2025-02-06 13:06:33,781 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 142 flow [2025-02-06 13:06:33,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:33,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:33,781 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:33,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:06:33,783 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:33,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:33,783 INFO L85 PathProgramCache]: Analyzing trace with hash -693770061, now seen corresponding path program 1 times [2025-02-06 13:06:33,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:33,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183975567] [2025-02-06 13:06:33,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:33,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:33,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:06:33,813 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:06:33,813 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:33,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:33,917 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 13:06:33,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:33,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183975567] [2025-02-06 13:06:33,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183975567] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:33,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:33,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:06:33,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866005931] [2025-02-06 13:06:33,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:33,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:33,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:33,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:33,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:33,919 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:33,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 13:06:33,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:33,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:33,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:34,830 INFO L124 PetriNetUnfolderBase]: 13080/18542 cut-off events. [2025-02-06 13:06:34,831 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2025-02-06 13:06:34,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37308 conditions, 18542 events. 13080/18542 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 107586 event pairs, 4436 based on Foata normal form. 162/11389 useless extension candidates. Maximal degree in co-relation 37277. Up to 15883 conditions per place. [2025-02-06 13:06:34,902 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 81 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-02-06 13:06:34,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 370 flow [2025-02-06 13:06:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2025-02-06 13:06:34,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2025-02-06 13:06:34,905 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 142 flow. Second operand 3 states and 129 transitions. [2025-02-06 13:06:34,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 370 flow [2025-02-06 13:06:34,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:34,907 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 149 flow [2025-02-06 13:06:34,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2025-02-06 13:06:34,908 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2025-02-06 13:06:34,908 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 149 flow [2025-02-06 13:06:34,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 13:06:34,908 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:34,908 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:34,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:06:34,909 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:34,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:34,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1584614156, now seen corresponding path program 1 times [2025-02-06 13:06:34,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:34,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138250168] [2025-02-06 13:06:34,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:34,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:34,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:06:35,028 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:06:35,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:35,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:35,100 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 13:06:35,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:35,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138250168] [2025-02-06 13:06:35,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138250168] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:35,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:35,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:35,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934224374] [2025-02-06 13:06:35,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:35,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:35,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:35,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:35,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:35,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:35,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:35,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:35,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:35,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:36,231 INFO L124 PetriNetUnfolderBase]: 12327/17506 cut-off events. [2025-02-06 13:06:36,231 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2025-02-06 13:06:36,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36906 conditions, 17506 events. 12327/17506 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 95686 event pairs, 4948 based on Foata normal form. 297/11610 useless extension candidates. Maximal degree in co-relation 11791. Up to 12773 conditions per place. [2025-02-06 13:06:36,322 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 84 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2025-02-06 13:06:36,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 385 flow [2025-02-06 13:06:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2025-02-06 13:06:36,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2025-02-06 13:06:36,324 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 149 flow. Second operand 3 states and 130 transitions. [2025-02-06 13:06:36,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 385 flow [2025-02-06 13:06:36,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:36,329 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 158 flow [2025-02-06 13:06:36,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2025-02-06 13:06:36,330 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2025-02-06 13:06:36,330 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 158 flow [2025-02-06 13:06:36,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:36,330 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:36,330 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:36,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:06:36,331 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:36,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash 836489911, now seen corresponding path program 1 times [2025-02-06 13:06:36,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:36,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783115092] [2025-02-06 13:06:36,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:36,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:36,339 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:06:36,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:06:36,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:36,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:36,422 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 13:06:36,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:36,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783115092] [2025-02-06 13:06:36,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783115092] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:36,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:36,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:36,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553661428] [2025-02-06 13:06:36,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:36,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:36,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:36,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:36,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:36,430 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:36,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 13:06:36,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:36,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:36,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:37,297 INFO L124 PetriNetUnfolderBase]: 12939/18483 cut-off events. [2025-02-06 13:06:37,298 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2025-02-06 13:06:37,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40233 conditions, 18483 events. 12939/18483 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 102862 event pairs, 11912 based on Foata normal form. 112/12534 useless extension candidates. Maximal degree in co-relation 12447. Up to 17493 conditions per place. [2025-02-06 13:06:37,371 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 81 selfloop transitions, 9 changer transitions 3/97 dead transitions. [2025-02-06 13:06:37,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 420 flow [2025-02-06 13:06:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2025-02-06 13:06:37,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43733333333333335 [2025-02-06 13:06:37,374 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 158 flow. Second operand 5 states and 164 transitions. [2025-02-06 13:06:37,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 420 flow [2025-02-06 13:06:37,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:37,379 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 228 flow [2025-02-06 13:06:37,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2025-02-06 13:06:37,380 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2025-02-06 13:06:37,380 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 228 flow [2025-02-06 13:06:37,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 13:06:37,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:37,380 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:37,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:06:37,380 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:37,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1716175215, now seen corresponding path program 1 times [2025-02-06 13:06:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:37,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756075908] [2025-02-06 13:06:37,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:37,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:37,391 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:06:37,406 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:06:37,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:37,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:37,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:37,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756075908] [2025-02-06 13:06:37,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756075908] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:37,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:37,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068261606] [2025-02-06 13:06:37,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:37,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:06:37,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:37,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:06:37,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:06:37,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-02-06 13:06:37,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 13:06:37,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:37,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-02-06 13:06:37,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:38,262 INFO L124 PetriNetUnfolderBase]: 7303/10529 cut-off events. [2025-02-06 13:06:38,262 INFO L125 PetriNetUnfolderBase]: For 975/975 co-relation queries the response was YES. [2025-02-06 13:06:38,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22805 conditions, 10529 events. 7303/10529 cut-off events. For 975/975 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 54908 event pairs, 6640 based on Foata normal form. 568/8282 useless extension candidates. Maximal degree in co-relation 20803. Up to 10498 conditions per place. [2025-02-06 13:06:38,298 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 55 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2025-02-06 13:06:38,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 320 flow [2025-02-06 13:06:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2025-02-06 13:06:38,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-02-06 13:06:38,299 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 228 flow. Second operand 4 states and 100 transitions. [2025-02-06 13:06:38,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 320 flow [2025-02-06 13:06:38,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:38,303 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 208 flow [2025-02-06 13:06:38,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2025-02-06 13:06:38,303 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2025-02-06 13:06:38,303 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 208 flow [2025-02-06 13:06:38,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 13:06:38,303 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:38,303 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:38,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:06:38,304 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:38,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1661825099, now seen corresponding path program 1 times [2025-02-06 13:06:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:38,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479692753] [2025-02-06 13:06:38,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:38,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:06:38,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:06:38,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:38,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:38,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:38,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479692753] [2025-02-06 13:06:38,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479692753] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:38,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:38,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:38,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232500214] [2025-02-06 13:06:38,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:38,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:38,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:38,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:38,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:38,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:38,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 13:06:38,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:38,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:38,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:38,817 INFO L124 PetriNetUnfolderBase]: 5967/8660 cut-off events. [2025-02-06 13:06:38,817 INFO L125 PetriNetUnfolderBase]: For 701/701 co-relation queries the response was YES. [2025-02-06 13:06:38,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18876 conditions, 8660 events. 5967/8660 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 43087 event pairs, 2918 based on Foata normal form. 158/6460 useless extension candidates. Maximal degree in co-relation 16864. Up to 6301 conditions per place. [2025-02-06 13:06:38,833 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 84 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2025-02-06 13:06:38,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 449 flow [2025-02-06 13:06:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2025-02-06 13:06:38,835 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-02-06 13:06:38,835 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 208 flow. Second operand 3 states and 123 transitions. [2025-02-06 13:06:38,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 449 flow [2025-02-06 13:06:38,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 445 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:38,837 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 220 flow [2025-02-06 13:06:38,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2025-02-06 13:06:38,838 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2025-02-06 13:06:38,838 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 220 flow [2025-02-06 13:06:38,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 13:06:38,838 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:38,839 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] [2025-02-06 13:06:38,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:06:38,839 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:38,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash -583170262, now seen corresponding path program 1 times [2025-02-06 13:06:38,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:38,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494471966] [2025-02-06 13:06:38,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:38,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:06:38,857 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:38,857 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:38,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:38,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:38,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494471966] [2025-02-06 13:06:38,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494471966] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:38,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:38,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014176044] [2025-02-06 13:06:38,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:38,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:38,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:38,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:38,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:38,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:38,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 13:06:38,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:38,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:38,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:39,396 INFO L124 PetriNetUnfolderBase]: 7310/10786 cut-off events. [2025-02-06 13:06:39,396 INFO L125 PetriNetUnfolderBase]: For 1095/1095 co-relation queries the response was YES. [2025-02-06 13:06:39,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24148 conditions, 10786 events. 7310/10786 cut-off events. For 1095/1095 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 57843 event pairs, 6726 based on Foata normal form. 20/8221 useless extension candidates. Maximal degree in co-relation 20186. Up to 8621 conditions per place. [2025-02-06 13:06:39,431 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 75 selfloop transitions, 7 changer transitions 5/91 dead transitions. [2025-02-06 13:06:39,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 91 transitions, 472 flow [2025-02-06 13:06:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2025-02-06 13:06:39,433 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2025-02-06 13:06:39,433 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 220 flow. Second operand 4 states and 134 transitions. [2025-02-06 13:06:39,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 91 transitions, 472 flow [2025-02-06 13:06:39,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 470 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:39,439 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 269 flow [2025-02-06 13:06:39,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2025-02-06 13:06:39,439 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2025-02-06 13:06:39,440 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 269 flow [2025-02-06 13:06:39,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 13:06:39,440 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:39,440 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:39,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:06:39,440 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:39,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1818110258, now seen corresponding path program 1 times [2025-02-06 13:06:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:39,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316769066] [2025-02-06 13:06:39,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:39,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:39,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:39,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:39,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:39,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:39,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:39,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316769066] [2025-02-06 13:06:39,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316769066] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:39,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:39,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:06:39,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862064910] [2025-02-06 13:06:39,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:39,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:39,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:39,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:39,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:39,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:39,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:39,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:39,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:39,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:40,496 INFO L124 PetriNetUnfolderBase]: 6469/9595 cut-off events. [2025-02-06 13:06:40,496 INFO L125 PetriNetUnfolderBase]: For 1121/1121 co-relation queries the response was YES. [2025-02-06 13:06:40,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21451 conditions, 9595 events. 6469/9595 cut-off events. For 1121/1121 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 51188 event pairs, 5958 based on Foata normal form. 0/7528 useless extension candidates. Maximal degree in co-relation 17478. Up to 9523 conditions per place. [2025-02-06 13:06:40,525 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 55 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2025-02-06 13:06:40,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 381 flow [2025-02-06 13:06:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-02-06 13:06:40,527 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2025-02-06 13:06:40,527 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 269 flow. Second operand 4 states and 104 transitions. [2025-02-06 13:06:40,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 381 flow [2025-02-06 13:06:40,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:40,533 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 263 flow [2025-02-06 13:06:40,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2025-02-06 13:06:40,534 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2025-02-06 13:06:40,534 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 263 flow [2025-02-06 13:06:40,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:40,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:40,534 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:40,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:06:40,534 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:40,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:40,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1125119489, now seen corresponding path program 1 times [2025-02-06 13:06:40,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:40,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982245891] [2025-02-06 13:06:40,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:40,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:40,549 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:40,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:40,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:40,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:40,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:40,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982245891] [2025-02-06 13:06:40,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982245891] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:40,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:40,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:40,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807508738] [2025-02-06 13:06:40,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:40,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:40,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:40,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:40,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:40,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-02-06 13:06:40,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 13:06:40,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:40,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-02-06 13:06:40,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:41,158 INFO L124 PetriNetUnfolderBase]: 5708/8520 cut-off events. [2025-02-06 13:06:41,158 INFO L125 PetriNetUnfolderBase]: For 1001/1001 co-relation queries the response was YES. [2025-02-06 13:06:41,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18743 conditions, 8520 events. 5708/8520 cut-off events. For 1001/1001 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 45146 event pairs, 5266 based on Foata normal form. 122/6930 useless extension candidates. Maximal degree in co-relation 14769. Up to 8448 conditions per place. [2025-02-06 13:06:41,186 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 54 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2025-02-06 13:06:41,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 371 flow [2025-02-06 13:06:41,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2025-02-06 13:06:41,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3 [2025-02-06 13:06:41,187 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 263 flow. Second operand 4 states and 90 transitions. [2025-02-06 13:06:41,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 371 flow [2025-02-06 13:06:41,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:41,190 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 256 flow [2025-02-06 13:06:41,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2025-02-06 13:06:41,190 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2025-02-06 13:06:41,190 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 256 flow [2025-02-06 13:06:41,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 13:06:41,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:41,191 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:41,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:06:41,191 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:41,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:41,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1091897980, now seen corresponding path program 1 times [2025-02-06 13:06:41,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:41,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830958139] [2025-02-06 13:06:41,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:41,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:41,202 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:06:41,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:06:41,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:41,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:41,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:41,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830958139] [2025-02-06 13:06:41,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830958139] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:41,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:41,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:41,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470690095] [2025-02-06 13:06:41,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:41,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:41,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:41,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:41,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:41,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:41,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:41,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:41,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:41,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:42,095 INFO L124 PetriNetUnfolderBase]: 8435/12846 cut-off events. [2025-02-06 13:06:42,095 INFO L125 PetriNetUnfolderBase]: For 1133/1133 co-relation queries the response was YES. [2025-02-06 13:06:42,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27776 conditions, 12846 events. 8435/12846 cut-off events. For 1133/1133 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 76316 event pairs, 7988 based on Foata normal form. 28/10380 useless extension candidates. Maximal degree in co-relation 19877. Up to 8465 conditions per place. [2025-02-06 13:06:42,140 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 81 selfloop transitions, 11 changer transitions 9/105 dead transitions. [2025-02-06 13:06:42,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 105 transitions, 630 flow [2025-02-06 13:06:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2025-02-06 13:06:42,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4186666666666667 [2025-02-06 13:06:42,141 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 256 flow. Second operand 5 states and 157 transitions. [2025-02-06 13:06:42,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 105 transitions, 630 flow [2025-02-06 13:06:42,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 622 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:42,145 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 363 flow [2025-02-06 13:06:42,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2025-02-06 13:06:42,145 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2025-02-06 13:06:42,145 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 363 flow [2025-02-06 13:06:42,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:42,146 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:42,146 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] [2025-02-06 13:06:42,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:06:42,146 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:42,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1469353505, now seen corresponding path program 1 times [2025-02-06 13:06:42,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589323574] [2025-02-06 13:06:42,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:42,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:42,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 13:06:42,166 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:06:42,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:42,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:42,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:42,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589323574] [2025-02-06 13:06:42,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589323574] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:42,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760554235] [2025-02-06 13:06:42,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:42,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:42,313 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 13:06:42,314 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 13:06:42,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 13:06:42,399 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:06:42,399 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:42,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:42,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:42,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:42,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:42,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760554235] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:42,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:42,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-02-06 13:06:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107044968] [2025-02-06 13:06:42,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:42,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:06:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:42,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:06:42,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:06:42,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:42,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 363 flow. Second operand has 13 states, 13 states have (on average 17.0) internal successors, (221), 13 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 13:06:42,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:42,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:42,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:43,850 INFO L124 PetriNetUnfolderBase]: 11412/17549 cut-off events. [2025-02-06 13:06:43,850 INFO L125 PetriNetUnfolderBase]: For 1708/1708 co-relation queries the response was YES. [2025-02-06 13:06:43,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38161 conditions, 17549 events. 11412/17549 cut-off events. For 1708/1708 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 113035 event pairs, 8586 based on Foata normal form. 28/14179 useless extension candidates. Maximal degree in co-relation 28383. Up to 7636 conditions per place. [2025-02-06 13:06:43,892 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 104 selfloop transitions, 22 changer transitions 23/153 dead transitions. [2025-02-06 13:06:43,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 153 transitions, 980 flow [2025-02-06 13:06:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:06:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:06:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 284 transitions. [2025-02-06 13:06:43,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34424242424242424 [2025-02-06 13:06:43,896 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 363 flow. Second operand 11 states and 284 transitions. [2025-02-06 13:06:43,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 153 transitions, 980 flow [2025-02-06 13:06:43,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 153 transitions, 976 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:43,902 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 557 flow [2025-02-06 13:06:43,903 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=557, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2025-02-06 13:06:43,903 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 14 predicate places. [2025-02-06 13:06:43,903 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 557 flow [2025-02-06 13:06:43,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.0) internal successors, (221), 13 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 13:06:43,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:43,904 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:43,911 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 13:06:44,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-06 13:06:44,105 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:44,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1475168879, now seen corresponding path program 1 times [2025-02-06 13:06:44,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:44,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769904843] [2025-02-06 13:06:44,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:44,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:44,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 13:06:44,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:06:44,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:44,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:44,154 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 13:06:44,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:44,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769904843] [2025-02-06 13:06:44,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769904843] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:44,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:44,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731314033] [2025-02-06 13:06:44,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:44,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:44,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:44,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:44,156 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:44,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 557 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 13:06:44,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:44,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:44,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:44,830 INFO L124 PetriNetUnfolderBase]: 10872/16689 cut-off events. [2025-02-06 13:06:44,830 INFO L125 PetriNetUnfolderBase]: For 2226/2226 co-relation queries the response was YES. [2025-02-06 13:06:44,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36926 conditions, 16689 events. 10872/16689 cut-off events. For 2226/2226 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 106169 event pairs, 9046 based on Foata normal form. 12/13323 useless extension candidates. Maximal degree in co-relation 26749. Up to 12142 conditions per place. [2025-02-06 13:06:44,879 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 60 selfloop transitions, 2 changer transitions 34/100 dead transitions. [2025-02-06 13:06:44,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 100 transitions, 790 flow [2025-02-06 13:06:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2025-02-06 13:06:44,880 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-02-06 13:06:44,880 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 557 flow. Second operand 3 states and 105 transitions. [2025-02-06 13:06:44,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 100 transitions, 790 flow [2025-02-06 13:06:44,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 100 transitions, 757 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:44,887 INFO L231 Difference]: Finished difference. Result has 83 places, 57 transitions, 265 flow [2025-02-06 13:06:44,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=83, PETRI_TRANSITIONS=57} [2025-02-06 13:06:44,888 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2025-02-06 13:06:44,888 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 57 transitions, 265 flow [2025-02-06 13:06:44,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 13:06:44,888 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:44,889 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:44,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-06 13:06:44,889 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:44,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash 791428440, now seen corresponding path program 2 times [2025-02-06 13:06:44,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:44,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201597635] [2025-02-06 13:06:44,890 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:44,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:44,900 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:06:44,908 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 28 statements. [2025-02-06 13:06:44,909 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:06:44,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:06:44,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:44,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201597635] [2025-02-06 13:06:44,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201597635] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:44,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:44,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:06:44,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663531498] [2025-02-06 13:06:44,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:44,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:44,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:44,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:44,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:44,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-02-06 13:06:44,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 57 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 13:06:44,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:44,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-02-06 13:06:44,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:45,625 INFO L124 PetriNetUnfolderBase]: 8273/11907 cut-off events. [2025-02-06 13:06:45,626 INFO L125 PetriNetUnfolderBase]: For 4017/4017 co-relation queries the response was YES. [2025-02-06 13:06:45,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29132 conditions, 11907 events. 8273/11907 cut-off events. For 4017/4017 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 58831 event pairs, 4313 based on Foata normal form. 204/9603 useless extension candidates. Maximal degree in co-relation 29074. Up to 4339 conditions per place. [2025-02-06 13:06:45,679 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 102 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2025-02-06 13:06:45,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 671 flow [2025-02-06 13:06:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2025-02-06 13:06:45,680 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2025-02-06 13:06:45,680 INFO L175 Difference]: Start difference. First operand has 83 places, 57 transitions, 265 flow. Second operand 4 states and 158 transitions. [2025-02-06 13:06:45,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 671 flow [2025-02-06 13:06:45,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 115 transitions, 615 flow, removed 18 selfloop flow, removed 10 redundant places. [2025-02-06 13:06:45,690 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 296 flow [2025-02-06 13:06:45,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2025-02-06 13:06:45,692 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2025-02-06 13:06:45,692 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 296 flow [2025-02-06 13:06:45,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 13:06:45,692 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:45,692 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:45,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:06:45,692 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:45,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:45,693 INFO L85 PathProgramCache]: Analyzing trace with hash -761586905, now seen corresponding path program 1 times [2025-02-06 13:06:45,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:45,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145585933] [2025-02-06 13:06:45,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:45,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:45,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-06 13:06:45,717 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 13:06:45,717 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:45,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:06:45,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:45,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145585933] [2025-02-06 13:06:45,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145585933] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:45,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:45,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:45,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407292550] [2025-02-06 13:06:45,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:45,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:45,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:45,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:45,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:45,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-02-06 13:06:45,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 13:06:45,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:45,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-02-06 13:06:45,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:46,393 INFO L124 PetriNetUnfolderBase]: 6674/9639 cut-off events. [2025-02-06 13:06:46,393 INFO L125 PetriNetUnfolderBase]: For 6701/6701 co-relation queries the response was YES. [2025-02-06 13:06:46,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24968 conditions, 9639 events. 6674/9639 cut-off events. For 6701/6701 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 46313 event pairs, 5798 based on Foata normal form. 0/8055 useless extension candidates. Maximal degree in co-relation 24921. Up to 9608 conditions per place. [2025-02-06 13:06:46,424 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 54 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2025-02-06 13:06:46,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 61 transitions, 404 flow [2025-02-06 13:06:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2025-02-06 13:06:46,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.264 [2025-02-06 13:06:46,425 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 296 flow. Second operand 5 states and 99 transitions. [2025-02-06 13:06:46,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 61 transitions, 404 flow [2025-02-06 13:06:46,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 61 transitions, 390 flow, removed 7 selfloop flow, removed 0 redundant places. [2025-02-06 13:06:46,430 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 282 flow [2025-02-06 13:06:46,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2025-02-06 13:06:46,431 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2025-02-06 13:06:46,431 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 282 flow [2025-02-06 13:06:46,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 13:06:46,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:46,432 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:46,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:06:46,432 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:46,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash -761586904, now seen corresponding path program 1 times [2025-02-06 13:06:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:46,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038944221] [2025-02-06 13:06:46,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:46,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:46,443 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-06 13:06:46,458 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 13:06:46,458 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:46,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:06:46,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:46,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038944221] [2025-02-06 13:06:46,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038944221] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:46,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711664376] [2025-02-06 13:06:46,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:46,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:46,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:46,734 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 13:06:46,735 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 13:06:46,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-06 13:06:46,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 13:06:46,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:46,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:46,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 13:06:46,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:46,889 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:06:46,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-02-06 13:06:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:06:47,160 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:47,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2025-02-06 13:06:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:06:47,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711664376] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:47,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:47,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-02-06 13:06:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709791324] [2025-02-06 13:06:47,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:47,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:06:47,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:47,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:06:47,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:06:47,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-02-06 13:06:47,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 282 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 13:06:47,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:47,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-02-06 13:06:47,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:49,200 INFO L124 PetriNetUnfolderBase]: 6525/9702 cut-off events. [2025-02-06 13:06:49,200 INFO L125 PetriNetUnfolderBase]: For 5083/5083 co-relation queries the response was YES. [2025-02-06 13:06:49,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24182 conditions, 9702 events. 6525/9702 cut-off events. For 5083/5083 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 48948 event pairs, 5709 based on Foata normal form. 633/8962 useless extension candidates. Maximal degree in co-relation 24133. Up to 7595 conditions per place. [2025-02-06 13:06:49,234 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 45 selfloop transitions, 14 changer transitions 43/106 dead transitions. [2025-02-06 13:06:49,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 106 transitions, 692 flow [2025-02-06 13:06:49,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-06 13:06:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-02-06 13:06:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 276 transitions. [2025-02-06 13:06:49,237 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2164705882352941 [2025-02-06 13:06:49,237 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 282 flow. Second operand 17 states and 276 transitions. [2025-02-06 13:06:49,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 106 transitions, 692 flow [2025-02-06 13:06:49,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 106 transitions, 683 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:49,242 INFO L231 Difference]: Finished difference. Result has 90 places, 61 transitions, 323 flow [2025-02-06 13:06:49,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=323, PETRI_PLACES=90, PETRI_TRANSITIONS=61} [2025-02-06 13:06:49,244 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2025-02-06 13:06:49,244 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 61 transitions, 323 flow [2025-02-06 13:06:49,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 13:06:49,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:49,245 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:49,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 13:06:49,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 13:06:49,445 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-02-06 13:06:49,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:49,446 INFO L85 PathProgramCache]: Analyzing trace with hash -903469441, now seen corresponding path program 1 times [2025-02-06 13:06:49,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:49,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857365123] [2025-02-06 13:06:49,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:49,460 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-06 13:06:49,543 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-06 13:06:49,543 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:49,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:51,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:51,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857365123] [2025-02-06 13:06:51,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857365123] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:51,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141713258] [2025-02-06 13:06:51,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:51,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:51,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:51,767 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 13:06:51,768 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 13:06:51,831 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-06 13:06:51,871 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-06 13:06:51,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:51,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:51,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-02-06 13:06:51,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:53,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:55,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:55,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 588 treesize of output 738 [2025-02-06 13:06:55,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:55,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 570 treesize of output 720