./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 d05018e114128995041419dca600f2451b0df342be45761a900c0d0704b1b40b --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:26:28,238 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:26:28,338 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:26:28,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:26:28,342 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:26:28,366 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:26:28,367 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:26:28,367 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:26:28,368 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:26:28,369 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:26:28,370 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:26:28,370 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:26:28,370 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:26:28,371 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:26:28,371 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:26:28,371 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:26:28,372 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:26:28,372 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:26:28,372 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:26:28,372 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:26:28,373 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:26:28,374 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:26:28,374 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:26:28,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:26:28,375 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:26:28,375 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:26:28,376 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:26:28,376 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:26:28,376 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:26:28,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:26:28,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:26:28,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:26:28,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:26:28,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:26:28,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:26:28,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:26:28,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:26:28,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:26:28,379 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:26:28,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:26:28,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:26:28,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:26:28,380 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d05018e114128995041419dca600f2451b0df342be45761a900c0d0704b1b40b [2024-10-14 19:26:28,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:26:28,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:26:28,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:26:28,664 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:26:28,664 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:26:28,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-10-14 19:26:30,120 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:26:30,377 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:26:30,378 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-10-14 19:26:30,392 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e41c4f0f/a7d879594ce942a398e3327d9a5e3af6/FLAG2e0550255 [2024-10-14 19:26:30,705 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e41c4f0f/a7d879594ce942a398e3327d9a5e3af6 [2024-10-14 19:26:30,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:26:30,709 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:26:30,710 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:26:30,710 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:26:30,716 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:26:30,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:26:30" (1/1) ... [2024-10-14 19:26:30,717 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c9a02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:30, skipping insertion in model container [2024-10-14 19:26:30,717 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:26:30" (1/1) ... [2024-10-14 19:26:30,775 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:26:31,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:26:31,228 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:26:31,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:26:31,328 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:26:31,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31 WrapperNode [2024-10-14 19:26:31,329 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:26:31,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:26:31,331 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:26:31,331 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:26:31,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,355 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,382 INFO L138 Inliner]: procedures = 173, calls = 28, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 88 [2024-10-14 19:26:31,384 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:26:31,385 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:26:31,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:26:31,385 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:26:31,395 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,401 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,426 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 2 writes are split as follows [0, 2]. [2024-10-14 19:26:31,427 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,427 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,435 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,441 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,442 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,444 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:26:31,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:26:31,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:26:31,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:26:31,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (1/1) ... [2024-10-14 19:26:31,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:26:31,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:26:31,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 19:26:31,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 19:26:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 19:26:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 19:26:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-14 19:26:31,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-14 19:26:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 19:26:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 19:26:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:26:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:26:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 19:26:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 19:26:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 19:26:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 19:26:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:26:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:26:31,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:26:31,552 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:26:31,692 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:26:31,695 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:26:31,964 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:26:31,965 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:26:32,093 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:26:32,093 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 19:26:32,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:26:32 BoogieIcfgContainer [2024-10-14 19:26:32,094 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:26:32,100 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:26:32,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:26:32,104 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:26:32,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:26:30" (1/3) ... [2024-10-14 19:26:32,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707baf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:26:32, skipping insertion in model container [2024-10-14 19:26:32,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:26:31" (2/3) ... [2024-10-14 19:26:32,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707baf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:26:32, skipping insertion in model container [2024-10-14 19:26:32,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:26:32" (3/3) ... [2024-10-14 19:26:32,111 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2024-10-14 19:26:32,125 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:26:32,125 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-10-14 19:26:32,125 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:26:32,174 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 19:26:32,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 84 flow [2024-10-14 19:26:32,231 INFO L124 PetriNetUnfolderBase]: 2/44 cut-off events. [2024-10-14 19:26:32,232 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:26:32,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 44 events. 2/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 91 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-10-14 19:26:32,238 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 84 flow [2024-10-14 19:26:32,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 84 flow [2024-10-14 19:26:32,260 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:26:32,275 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;@1b6bab82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:26:32,275 INFO L334 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2024-10-14 19:26:32,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:26:32,280 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-14 19:26:32,281 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:26:32,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:26:32,282 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:26:32,282 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-14 19:26:32,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:26:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash 338830, now seen corresponding path program 1 times [2024-10-14 19:26:32,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:26:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9979044] [2024-10-14 19:26:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:26:32,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:26:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:26:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:26:32,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:26:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9979044] [2024-10-14 19:26:32,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9979044] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:26:32,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:26:32,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:26:32,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000637007] [2024-10-14 19:26:32,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:26:32,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 19:26:32,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:26:32,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 19:26:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 19:26:32,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-14 19:26:32,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 84 flow. Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:32,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:26:32,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-14 19:26:32,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:26:32,728 INFO L124 PetriNetUnfolderBase]: 36/130 cut-off events. [2024-10-14 19:26:32,729 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:26:32,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 130 events. 36/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 421 event pairs, 33 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 213. Up to 92 conditions per place. [2024-10-14 19:26:32,732 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 0 changer transitions 0/35 dead transitions. [2024-10-14 19:26:32,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 116 flow [2024-10-14 19:26:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 19:26:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-14 19:26:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2024-10-14 19:26:32,746 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-10-14 19:26:32,748 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 84 flow. Second operand 2 states and 54 transitions. [2024-10-14 19:26:32,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 116 flow [2024-10-14 19:26:32,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:26:32,754 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 74 flow [2024-10-14 19:26:32,757 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=74, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-10-14 19:26:32,763 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-10-14 19:26:32,763 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 74 flow [2024-10-14 19:26:32,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:32,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:26:32,764 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-14 19:26:32,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 19:26:32,765 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-14 19:26:32,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:26:32,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1504693468, now seen corresponding path program 1 times [2024-10-14 19:26:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:26:32,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499418853] [2024-10-14 19:26:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:26:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:26:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:26:32,802 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 19:26:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:26:32,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 19:26:32,858 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 19:26:32,860 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2024-10-14 19:26:32,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2024-10-14 19:26:32,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2024-10-14 19:26:32,863 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2024-10-14 19:26:32,863 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2024-10-14 19:26:32,863 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 32 remaining) [2024-10-14 19:26:32,865 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2024-10-14 19:26:32,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 32 remaining) [2024-10-14 19:26:32,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2024-10-14 19:26:32,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (22 of 32 remaining) [2024-10-14 19:26:32,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (21 of 32 remaining) [2024-10-14 19:26:32,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2024-10-14 19:26:32,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2024-10-14 19:26:32,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 32 remaining) [2024-10-14 19:26:32,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2024-10-14 19:26:32,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2024-10-14 19:26:32,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (15 of 32 remaining) [2024-10-14 19:26:32,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2024-10-14 19:26:32,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2024-10-14 19:26:32,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2024-10-14 19:26:32,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2024-10-14 19:26:32,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 32 remaining) [2024-10-14 19:26:32,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2024-10-14 19:26:32,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2024-10-14 19:26:32,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2024-10-14 19:26:32,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 32 remaining) [2024-10-14 19:26:32,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (5 of 32 remaining) [2024-10-14 19:26:32,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2024-10-14 19:26:32,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2024-10-14 19:26:32,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (2 of 32 remaining) [2024-10-14 19:26:32,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2024-10-14 19:26:32,872 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2024-10-14 19:26:32,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 19:26:32,873 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-14 19:26:32,877 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 19:26:32,877 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-14 19:26:32,936 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 19:26:32,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 156 flow [2024-10-14 19:26:32,958 INFO L124 PetriNetUnfolderBase]: 4/82 cut-off events. [2024-10-14 19:26:32,959 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:26:32,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 82 events. 4/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 284 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 69. Up to 3 conditions per place. [2024-10-14 19:26:32,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 156 flow [2024-10-14 19:26:32,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 156 flow [2024-10-14 19:26:32,963 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:26:32,964 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;@1b6bab82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:26:32,964 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-10-14 19:26:32,966 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:26:32,966 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-14 19:26:32,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:26:32,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:26:32,966 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:26:32,966 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-14 19:26:32,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:26:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 411319, now seen corresponding path program 1 times [2024-10-14 19:26:32,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:26:32,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474813441] [2024-10-14 19:26:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:26:32,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:26:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:26:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:26:33,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:26:33,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474813441] [2024-10-14 19:26:33,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474813441] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:26:33,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:26:33,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:26:33,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372325427] [2024-10-14 19:26:33,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:26:33,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 19:26:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:26:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 19:26:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 19:26:33,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 73 [2024-10-14 19:26:33,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 156 flow. Second operand has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:33,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:26:33,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 73 [2024-10-14 19:26:33,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:26:33,524 INFO L124 PetriNetUnfolderBase]: 1666/3265 cut-off events. [2024-10-14 19:26:33,525 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-14 19:26:33,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6016 conditions, 3265 events. 1666/3265 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 20699 event pairs, 1555 based on Foata normal form. 0/2184 useless extension candidates. Maximal degree in co-relation 5378. Up to 2692 conditions per place. [2024-10-14 19:26:33,557 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 39 selfloop transitions, 0 changer transitions 0/66 dead transitions. [2024-10-14 19:26:33,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 220 flow [2024-10-14 19:26:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 19:26:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-14 19:26:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 100 transitions. [2024-10-14 19:26:33,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.684931506849315 [2024-10-14 19:26:33,561 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 156 flow. Second operand 2 states and 100 transitions. [2024-10-14 19:26:33,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 220 flow [2024-10-14 19:26:33,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:26:33,565 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 142 flow [2024-10-14 19:26:33,567 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-10-14 19:26:33,567 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -4 predicate places. [2024-10-14 19:26:33,569 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 142 flow [2024-10-14 19:26:33,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:33,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:26:33,569 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 19:26:33,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 19:26:33,570 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-14 19:26:33,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:26:33,571 INFO L85 PathProgramCache]: Analyzing trace with hash -629687832, now seen corresponding path program 1 times [2024-10-14 19:26:33,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:26:33,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058440648] [2024-10-14 19:26:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:26:33,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:26:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:26:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:26:33,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:26:33,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058440648] [2024-10-14 19:26:33,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058440648] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:26:33,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:26:33,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:26:33,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379938189] [2024-10-14 19:26:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:26:33,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:26:33,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:26:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:26:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:26:33,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 73 [2024-10-14 19:26:33,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:33,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:26:33,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 73 [2024-10-14 19:26:33,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:26:34,506 INFO L124 PetriNetUnfolderBase]: 3369/6333 cut-off events. [2024-10-14 19:26:34,507 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-14 19:26:34,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11808 conditions, 6333 events. 3369/6333 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 41382 event pairs, 1279 based on Foata normal form. 0/4534 useless extension candidates. Maximal degree in co-relation 11803. Up to 3047 conditions per place. [2024-10-14 19:26:34,562 INFO L140 encePairwiseOnDemand]: 59/73 looper letters, 71 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2024-10-14 19:26:34,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 373 flow [2024-10-14 19:26:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:26:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:26:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-10-14 19:26:34,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6894977168949772 [2024-10-14 19:26:34,565 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 142 flow. Second operand 3 states and 151 transitions. [2024-10-14 19:26:34,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 373 flow [2024-10-14 19:26:34,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 373 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:26:34,571 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 214 flow [2024-10-14 19:26:34,571 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-10-14 19:26:34,574 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-10-14 19:26:34,574 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 214 flow [2024-10-14 19:26:34,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:34,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:26:34,575 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 19:26:34,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 19:26:34,575 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-14 19:26:34,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:26:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash -629687831, now seen corresponding path program 1 times [2024-10-14 19:26:34,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:26:34,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141135378] [2024-10-14 19:26:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:26:34,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:26:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:26:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:26:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:26:34,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141135378] [2024-10-14 19:26:34,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141135378] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:26:34,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:26:34,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:26:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452156418] [2024-10-14 19:26:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:26:34,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:26:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:26:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:26:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:26:34,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 73 [2024-10-14 19:26:34,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:34,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:26:34,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 73 [2024-10-14 19:26:34,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:26:35,301 INFO L124 PetriNetUnfolderBase]: 2175/4320 cut-off events. [2024-10-14 19:26:35,301 INFO L125 PetriNetUnfolderBase]: For 849/849 co-relation queries the response was YES. [2024-10-14 19:26:35,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9076 conditions, 4320 events. 2175/4320 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 27382 event pairs, 780 based on Foata normal form. 540/3927 useless extension candidates. Maximal degree in co-relation 9069. Up to 2973 conditions per place. [2024-10-14 19:26:35,345 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 57 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2024-10-14 19:26:35,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 369 flow [2024-10-14 19:26:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:26:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:26:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-10-14 19:26:35,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6255707762557078 [2024-10-14 19:26:35,348 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 214 flow. Second operand 3 states and 137 transitions. [2024-10-14 19:26:35,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 369 flow [2024-10-14 19:26:35,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 353 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:26:35,360 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 192 flow [2024-10-14 19:26:35,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-10-14 19:26:35,364 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2024-10-14 19:26:35,364 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 192 flow [2024-10-14 19:26:35,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:35,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:26:35,365 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-14 19:26:35,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 19:26:35,365 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-14 19:26:35,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:26:35,367 INFO L85 PathProgramCache]: Analyzing trace with hash 184899197, now seen corresponding path program 1 times [2024-10-14 19:26:35,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:26:35,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277473873] [2024-10-14 19:26:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:26:35,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:26:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:26:35,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 19:26:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:26:35,396 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 19:26:35,397 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 19:26:35,397 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 47 remaining) [2024-10-14 19:26:35,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 47 remaining) [2024-10-14 19:26:35,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 47 remaining) [2024-10-14 19:26:35,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 47 remaining) [2024-10-14 19:26:35,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 47 remaining) [2024-10-14 19:26:35,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 47 remaining) [2024-10-14 19:26:35,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 47 remaining) [2024-10-14 19:26:35,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 47 remaining) [2024-10-14 19:26:35,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 47 remaining) [2024-10-14 19:26:35,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (37 of 47 remaining) [2024-10-14 19:26:35,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (36 of 47 remaining) [2024-10-14 19:26:35,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 47 remaining) [2024-10-14 19:26:35,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 47 remaining) [2024-10-14 19:26:35,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (33 of 47 remaining) [2024-10-14 19:26:35,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 47 remaining) [2024-10-14 19:26:35,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 47 remaining) [2024-10-14 19:26:35,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (30 of 47 remaining) [2024-10-14 19:26:35,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 47 remaining) [2024-10-14 19:26:35,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 47 remaining) [2024-10-14 19:26:35,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 47 remaining) [2024-10-14 19:26:35,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 47 remaining) [2024-10-14 19:26:35,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 47 remaining) [2024-10-14 19:26:35,402 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 47 remaining) [2024-10-14 19:26:35,402 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 47 remaining) [2024-10-14 19:26:35,402 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 47 remaining) [2024-10-14 19:26:35,402 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 47 remaining) [2024-10-14 19:26:35,403 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (20 of 47 remaining) [2024-10-14 19:26:35,403 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 47 remaining) [2024-10-14 19:26:35,403 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 47 remaining) [2024-10-14 19:26:35,403 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (17 of 47 remaining) [2024-10-14 19:26:35,403 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 47 remaining) [2024-10-14 19:26:35,403 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 47 remaining) [2024-10-14 19:26:35,403 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 47 remaining) [2024-10-14 19:26:35,403 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 47 remaining) [2024-10-14 19:26:35,405 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 47 remaining) [2024-10-14 19:26:35,406 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 47 remaining) [2024-10-14 19:26:35,406 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 47 remaining) [2024-10-14 19:26:35,406 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 47 remaining) [2024-10-14 19:26:35,406 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 47 remaining) [2024-10-14 19:26:35,406 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 47 remaining) [2024-10-14 19:26:35,406 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 47 remaining) [2024-10-14 19:26:35,407 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (5 of 47 remaining) [2024-10-14 19:26:35,407 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 47 remaining) [2024-10-14 19:26:35,407 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 47 remaining) [2024-10-14 19:26:35,407 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (2 of 47 remaining) [2024-10-14 19:26:35,407 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 47 remaining) [2024-10-14 19:26:35,407 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 47 remaining) [2024-10-14 19:26:35,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 19:26:35,408 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-14 19:26:35,408 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 19:26:35,408 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-14 19:26:35,478 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 19:26:35,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 230 flow [2024-10-14 19:26:35,497 INFO L124 PetriNetUnfolderBase]: 6/120 cut-off events. [2024-10-14 19:26:35,497 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-14 19:26:35,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 6/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 491 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 101. Up to 4 conditions per place. [2024-10-14 19:26:35,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 106 transitions, 230 flow [2024-10-14 19:26:35,501 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 106 transitions, 230 flow [2024-10-14 19:26:35,502 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:26:35,503 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;@1b6bab82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:26:35,503 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-10-14 19:26:35,505 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:26:35,505 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-14 19:26:35,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:26:35,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:26:35,505 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:26:35,505 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-14 19:26:35,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:26:35,505 INFO L85 PathProgramCache]: Analyzing trace with hash 516577, now seen corresponding path program 1 times [2024-10-14 19:26:35,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:26:35,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788763807] [2024-10-14 19:26:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:26:35,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:26:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:26:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:26:35,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:26:35,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788763807] [2024-10-14 19:26:35,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788763807] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:26:35,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:26:35,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:26:35,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117490670] [2024-10-14 19:26:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:26:35,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 19:26:35,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:26:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 19:26:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 19:26:35,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 106 [2024-10-14 19:26:35,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:35,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:26:35,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 106 [2024-10-14 19:26:35,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:26:42,613 INFO L124 PetriNetUnfolderBase]: 48556/74370 cut-off events. [2024-10-14 19:26:42,614 INFO L125 PetriNetUnfolderBase]: For 2090/2090 co-relation queries the response was YES. [2024-10-14 19:26:42,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142786 conditions, 74370 events. 48556/74370 cut-off events. For 2090/2090 co-relation queries the response was YES. Maximal size of possible extension queue 1737. Compared 562928 event pairs, 45529 based on Foata normal form. 0/49073 useless extension candidates. Maximal degree in co-relation 69546. Up to 67060 conditions per place. [2024-10-14 19:26:43,511 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 57 selfloop transitions, 0 changer transitions 0/97 dead transitions. [2024-10-14 19:26:43,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 326 flow [2024-10-14 19:26:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 19:26:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-14 19:26:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 146 transitions. [2024-10-14 19:26:43,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6886792452830188 [2024-10-14 19:26:43,515 INFO L175 Difference]: Start difference. First operand has 107 places, 106 transitions, 230 flow. Second operand 2 states and 146 transitions. [2024-10-14 19:26:43,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 326 flow [2024-10-14 19:26:43,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 97 transitions, 324 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-14 19:26:43,520 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 210 flow [2024-10-14 19:26:43,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=210, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2024-10-14 19:26:43,521 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -5 predicate places. [2024-10-14 19:26:43,521 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 210 flow [2024-10-14 19:26:43,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:43,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:26:43,522 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 19:26:43,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 19:26:43,522 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-14 19:26:43,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:26:43,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1787855480, now seen corresponding path program 1 times [2024-10-14 19:26:43,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:26:43,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392906912] [2024-10-14 19:26:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:26:43,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:26:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:26:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:26:43,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:26:43,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392906912] [2024-10-14 19:26:43,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392906912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:26:43,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:26:43,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:26:43,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904404106] [2024-10-14 19:26:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:26:43,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:26:43,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:26:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:26:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:26:43,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 106 [2024-10-14 19:26:43,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:43,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:26:43,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 106 [2024-10-14 19:26:43,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:26:55,038 INFO L124 PetriNetUnfolderBase]: 102347/156705 cut-off events. [2024-10-14 19:26:55,038 INFO L125 PetriNetUnfolderBase]: For 2058/2058 co-relation queries the response was YES. [2024-10-14 19:26:55,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300023 conditions, 156705 events. 102347/156705 cut-off events. For 2058/2058 co-relation queries the response was YES. Maximal size of possible extension queue 3341. Compared 1302318 event pairs, 46139 based on Foata normal form. 0/108759 useless extension candidates. Maximal degree in co-relation 300017. Up to 84446 conditions per place. [2024-10-14 19:26:56,205 INFO L140 encePairwiseOnDemand]: 91/106 looper letters, 106 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2024-10-14 19:26:56,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 149 transitions, 554 flow [2024-10-14 19:26:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:26:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:26:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2024-10-14 19:26:56,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.710691823899371 [2024-10-14 19:26:56,208 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 210 flow. Second operand 3 states and 226 transitions. [2024-10-14 19:26:56,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 149 transitions, 554 flow [2024-10-14 19:26:56,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 149 transitions, 554 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:26:56,213 INFO L231 Difference]: Finished difference. Result has 106 places, 105 transitions, 290 flow [2024-10-14 19:26:56,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=106, PETRI_TRANSITIONS=105} [2024-10-14 19:26:56,214 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2024-10-14 19:26:56,214 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 105 transitions, 290 flow [2024-10-14 19:26:56,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:56,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:26:56,215 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 19:26:56,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 19:26:56,215 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-14 19:26:56,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:26:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1787855479, now seen corresponding path program 1 times [2024-10-14 19:26:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:26:56,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852327417] [2024-10-14 19:26:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:26:56,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:26:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:26:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:26:56,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:26:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852327417] [2024-10-14 19:26:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852327417] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:26:56,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:26:56,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:26:56,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330413561] [2024-10-14 19:26:56,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:26:56,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:26:56,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:26:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:26:56,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:26:56,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 106 [2024-10-14 19:26:56,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:26:56,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:26:56,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 106 [2024-10-14 19:26:56,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:27:04,994 INFO L124 PetriNetUnfolderBase]: 71516/116622 cut-off events. [2024-10-14 19:27:04,994 INFO L125 PetriNetUnfolderBase]: For 19283/19283 co-relation queries the response was YES. [2024-10-14 19:27:05,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243626 conditions, 116622 events. 71516/116622 cut-off events. For 19283/19283 co-relation queries the response was YES. Maximal size of possible extension queue 2423. Compared 1006255 event pairs, 18951 based on Foata normal form. 10245/97398 useless extension candidates. Maximal degree in co-relation 243618. Up to 85264 conditions per place. [2024-10-14 19:27:06,095 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 94 selfloop transitions, 3 changer transitions 0/137 dead transitions. [2024-10-14 19:27:06,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 137 transitions, 562 flow [2024-10-14 19:27:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:27:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:27:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2024-10-14 19:27:06,097 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-14 19:27:06,097 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 290 flow. Second operand 3 states and 212 transitions. [2024-10-14 19:27:06,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 137 transitions, 562 flow [2024-10-14 19:27:06,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 137 transitions, 544 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:27:06,345 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 266 flow [2024-10-14 19:27:06,345 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-10-14 19:27:06,346 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -7 predicate places. [2024-10-14 19:27:06,346 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 266 flow [2024-10-14 19:27:06,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:27:06,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:27:06,346 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:27:06,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 19:27:06,346 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-14 19:27:06,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:27:06,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1314082893, now seen corresponding path program 1 times [2024-10-14 19:27:06,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:27:06,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028001131] [2024-10-14 19:27:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:27:06,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:27:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:27:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:27:06,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:27:06,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028001131] [2024-10-14 19:27:06,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028001131] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:27:06,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:27:06,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:27:06,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726109300] [2024-10-14 19:27:06,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:27:06,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:27:06,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:27:06,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:27:06,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:27:06,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 106 [2024-10-14 19:27:06,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:27:06,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:27:06,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 106 [2024-10-14 19:27:06,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand